What file types can be verified by MetaDefender v4?

What is file type verification?

File type is usually represented by its file extension and associated application(s). Each file type has one or more corresponding file extensions. The file extension is appended to the end of each file name which provides a simple way for both the operating system and users to identify the file type of each file. However, file extension can be changed easily to spoof the operating system and users without modifying the content or changing the capability of the file to bypass certain security or filtering prevention systems. Our file type verification function offers an advanced mechanism to validate a given file type by analyzing the file's structure and content. With this technology, users can verify the true file type for given files and minimize the risk of file type spoofing.

What is the difference between file type and file format?

File type and file format are, in most cases, used interchangeably. But from a strict definition standpoint, file format describes how the file structures and organizes the content. It specifies how bits are used to encode information in a digital storage medium. And it is considered as a standard way that information is encoded for storage in a computer file. For example, the file type of an image file saved using JPEG compression may be defined as a "JPEG image file." The file format may be described as a binary file that contains a file header, metadata, and compressed bitmap image data.

What does MetaDefender offer for file type verification?

With MetaDefender's file type verification technology, users can process files based on their true file types, so the system can take more precautions with risky file types like EXEs, perhaps setting different policies or rules based on file type. Spoofed file types indicate potentially malicious intent, so to mitigate this risk, MetaDefender offers functionality to block files with incorrect extensions, for example, prevents an instance of EXE file which is posed as TXT file from entering the organization. Also, more strict rules, like remediation steps can be applied. For example, Data Sanitization is triggered as a post-action for the file type verification. This is highly configurable so that Data Sanitization or any other secure processes can happen based on the target file name, file format and any other recognized file property data as well.

What is the limitation of file type verification?

File type verification is not the ultimate security protection for all use cases: our engineers analyze the file format identifier (magic signature), pattern and structure of the file content . This approach is not guaranteed to work for all file types. B oth false positive and false negative incidences may potentially apply

File type verification is a validation method so it does not mean all file types that are covered for verification are supported by Multi-Scanning or Data Sanitization
You should understand your use case and the potential impact on productivity before leveraging file type verification as a secure mechanism to stop files or allow files

MetaDefender version 4 can verify more than 4,500 different file types as of writing this article. See below for a complete list of all the supported file types:

Supported file type	Description
BAM	Infinity Engine Animation (v1)
0	Hacha multipart archive (block 0)
1	CP Backup saved data (v7.x)
545	AIMutation skin
669	Composer 669 module
777	777 compressed archive
??_	Microsoft KWAJ compressed (Phil Katz's 'deflate')
@@@	DOS 2.0-3.2 Backup control info
_01	Compaq QRST disk image
{SA}PROJ	{smartassembly} project
~I	AZZ Cardfile index
000/001/999	Sage Backup
0SC/0FN	Jazz Jackrabbit font/cutscene
1SC	Bio-Rad Scan file
1TM	1tracker Module
2BIT	2BIT DNA sequences (LE)
2D	VersaCAD 2D drawing (MS-DOS)
2DA	Infinity Engine 2-Dimensional Array (v1.0)
2DC	Cadwork 2D Catalog
2DL	VersaCAD 2D Library (MS-DOS)
2MG/2IMG	2IMG Universal Format disk image (Apple II)
2SFLIB	2SF Nintendo DS Sound Format rip
3D	CAD-3D object
3D2	Cyber Studio CAD-3D v2 object
3DB	3DMark database
3DM	Cadent 3D Model
3DMF	QuickDraw 3D Metafile (binary)
3DP	3Digi Parameters
3DR	3DMark2003 Results
3DS	3D Studio mesh
3DSX	Nintendo 3DS Homebrew relocatable and eXecutable binary
3DXML	3D XML files (unzipped)
3FR	Hasselblad 3F RAW image
3G2/3GPP2	3GPP2 multimedia audio/video
3GA	Mobile phone audio
3GP/3GPP	3GPP multimedia audio/video
3MF	3D Manufacturing Format model
3MM/3TH/CHK	3D Movie Maker (generic)
4PK	Perfect Keyboard macro set
4PP/PHP	Photoparade Slideshow
5VW	5View capture
64C	C64 8x8 font bitmap
64S	Hoxs64 state snapshot
7Z	7-Zip compressed archive (gen)
8*	PhotoShop plug-in (generic)
8BF	Photoshop filter plug-in
8SVX/IFF	Amiga IFF 8SVX audio
8XK	Texas Instruments TI-8x series Calculators Program
8XU	Texas Instruments TI-8x series Calculators OS Upgrade
92I	TI bitmap
A	Binding of Isaac Rebirth packed Archive
A1WISH	Audials One Wishlist
A2D	Agros2D document
A2M	AdLib Tracker II Module
A2MENU	Aston 2 Menu
A2THEME	Aston 2 Theme
A3D/X	Amapi 3D model
A3P	Alice 3 Project
A3W	Unpackaged Authorware 3 for Windows file
A3X	AutoIt v3 compiled script
A4P/A5P	Authorware Packaged file (w/o runtime)
A4R/A5R	Authorware Packaged file (with runtime)
A4W	Apple II Oasis for Windows savestate
A5WCMP	Alpha Five Web Components
A78	Atari 7800 ROM
A8K	Atari800Win Plus Keyboard
A8S	Atari800Win Plus Snapshot (un-gzipped)
A8T	Atari800Win Plus Trainer
AA	Audible Audio
AA3	ATRAC3 encoded audio
AAC	Astrid/Quartex AAC encoded audio
AAE	Apple Sidecar data
AAM	Art And Magic module
AAS	Advanced Authoring System adventure
AAS/AOS	Archos signed / encrypted data
AAUI	Acrobat User Interface data
AAX	Audible Enhanced Audio
AB	Android adb backup (unencrypted)
AB1/FSA	ABIF - Applied Biosystems Inc. Format
ABA	Palm Address Book
ABC	ABC FlowCharter document
ABCDP	Address Book CoreData Person
ABD	The Bat! Address Book
ABF	Altair Binary Format
ABR	Adobe PhotoShop Brush
ABS	AMOS Banks group
ABW	AbiWord document
ABY	AOL Address Book
AC	AC3D geometry/model
AC_	CaseWare 2005 Compressed file
AC1D	AC1D-DC1A Packer
AC2	Banana accounting data
AC3	Dolby Digital audio
AC3D	AC3D model
ACB	Adobe Photoshop Color Book
ACCDB	Microsoft Access 2007 Database
ACCDW	Microsoft Access Database Link
ACD	ALAN game
ACDB	Audio Calibration DataBase
ACE	ACE compressed archive
ACF	DB/TextWorks Database Access Control
ACI	ACI development appraisal data
ACM	Infinity Engine Music
ACP	ArCon project
ACR	American College of Radiology file
ACS	Microsoft Agent Character
ACS2	AIMP Skin (v2)
ACS3	AIMP Skin (v3)
ACSM	Adobe Digital Editions Adobe Content Server Message
ACT	ADPCM (?) compressed file recorded by some MP3 Players/Voice recorders
AD	Anno Designer layout
AD_ASM	Alibre Design Assembly
AD_DRW	Alibre Design Drawing
AD_PRT	Alibre Design Part
AD1/E01/S01	AD Encrypted disk image
ADA	Advanced Digital Audio compressed audio
ADB/NDB/GDB/PDB	HP Phone/Database/Note database
ADC	XemiComputers Active Desktop Calendar
ADCP	Adobe Device Central Project
ADF	ARIS Document File
ADF/ADFS/ADL	ADFS disk image
ADI/ADIF	Amateur Data Interchange Format
ADL	openEHR Archetype Definition Language
ADM	Addict compiled dictionary
ADML	Group Policy Language-Specific Administrative Template
ADMX	Group Policy Administrative Template
ADR	Opera Hotlist (v2.0) / bookmark
ADT	Advantage Data Server table
ADV	Advantage spreadsheet
ADX	ADX lossy compressed audio
AEF	CA Visual Object Application Export File
AEH	iPer Advanced Embedded Hypertext
AEM	STK Azimuth-Elevation Mask format
AEP	After Effects Project
AERO	Aero Studio song
AES	AES Crypt encrypted
AF3	ABC FlowCharter chart
AFA	Astrotite compressed archive
AFB	AYFX Editor Bank
AFDESIGN	Affinity Design document
AFI	Advanced Floppy Image
AFL	X-Plane Airfoils
AFM	Outline Font Metric
AFP	ABC FlowCharter shapes Palette
AFT	ABC FlowCharter Template
AFW	ABC FlowCharter Workspace
AG	Applixware Graphic
AGR	Grace project file
AGTEMPLATE	Adobe Photoshop Lightroom template
AGX	Adventure Game eXecutable
AHX	Abyss' Highest eXperience module (v1)
AI	Adobe Illustrator graphics
AIA	Adobe Illustrator Action
AIC	Advanced Image Coding bitmap
AIF	EPOC/Symbian Application Info
AIF/AIFF	AIFF Audio Interchange File Format
AIFC	AIFF-C (Audio Interchange File Format Compressed)
AIML	Artificial Intelligence Markup Language
AIMPPL	AIMP PlayList
AIN	AIN compressed archive
AIP	Actual Installer Project
AIR	Adobe Apollo Rich Internet Application (obsolete)
AIU	Advanced Installer Updates configuration
AJP	Anfy Applet Generator Saved file
AKM	Aksharamala Keymap Binary
AKP	Akai AKP format
AKS	AkAbak Script
AKT	AKT compressed archive
ALB	Seattle FilmWorks / PhotoWorks photo album
ALBM	HP Photosmart Photo Printing Album
ALC/VLC	AcuCorp AcuCOBOL license
ALE	Avid Log Exchange
ALIAS	Find and Run Robot (FARR) alias
ALM	Aley's Module v1.0
ALN	Clustal Alignment format
ALP	AnyLogic Project
ALS	MPEG-4 ALS (Audio Lossless coding Standard)
ALTSTATE	Altirra save state
ALX	BlackBerry Application Loader
ALZ	ALZip compressed archive
AM	AmiraMesh (ASCII)
AMAD	AY Amadeus chiptune
AMB	Modular V preset
AMC	A.M.Composer 1.2 music
AMD	Amusic tracker (packed) song/module
AMF	Additive Manufacturing Format
AMG	AMGC compressed archive
AML	Abstract Markup Language
AMOS	AMOS Pro source
AMR	AMR (Adaptive Multi Rate) encoded audio
AMS	Extreme's Tracker module
AMT	ABBYY Finereader language data
AMV	MTV Movie
AMW	Anark Media Workspace
AMXD	Ableton Max Patch
AMXX	AMX Mod X plugin
AN2	AceNotes PIM data
AN8	Anim8or project
ANA	Analysis for Windows structure
ANB	Project Dogwaffle Animated Brush
ANBM	IFF ANimated BitMap
ANC	Motion Analysis Corp. ANC format
ANE	Adobe AIR Native Extension
ANI	Atari NEOchrome animation
ANIM	ClariSSA Super Smooth Animation
ANIM/ANM	IFF ANIM (Amiga delta/RLE encoded bitmap animation)
ANJUTA	Anjuta IDE project
ANK	Children of the Nile city
ANL	SimLife Animal
ANM	DeluxePaint Animation
ANM2	The Binding of Isaac: Rebirth animation
ANS	ANSYS model data
ANS/ASC	ANSI escape sequence text
ANTMPL	Adobe Edge Animate Template
ANY	AnyRail model railroad layout
AOF	Artlantis Object File
AOI	Art Of Illusion 3D scene
AOM	Adobe Download Manager
AON	Art Of Noise 4-channel module
AOS	AOS File Format
AP	ALICE: The Personal Pascal Program
APALBUM	Aperture Album
APC	Cryo Interactive APC audio
APCDOC	Ashampoo Photo Commander Document
APDISK	OS X system data
APE	Monkey's Audio
APEX	AVM APEX sample studio sound bank
APF	MightyFax
API	Adobe Acrobat Reader Plugin
APJ	ARM Project Manager Project
APK	Android Package
APKG	Exported Anki Flashcard Deck
APL	ACDSee plugin
APL/APP	Team Developer / SQLWindows application (binary)
APN	APN Wallpaper
APNX	Amazon Kindle Page Number index
APP	APP raster bitmap
APP/DL	oZone GUI executable code
APP/IMG	PSION Application/Image executable
APPLICATION	ClickOnce Deployment Manifest
APPUP	Erlang Application Upgrade
APPX	Windows 8 App package
APPXBUNDLE	Windows 8.1 App Bundle
APPXMANIFEST	Windows 8 Appx Package Manifest
APR	Apadana Project
APS	AProSys module
APT	Adaptive Prediction Tree (APT) encoded bitmap
APV	API Viewer Database
APXL	Apple Keynote Presentation data
AQM	AlpineQuest Map
AR	ACCAreader document
AR/A/LBR	ar archive
ARC	EZBIND archive
ARC/SZS/YAZ0	Nintendo Yaz0 compressed data
ARCH00	F.E.A.R. game archive
ARDUBOY	Arduboy game package
ARE	Infinity Engine Area (v9.1)
AREN	Advanced Renamer method
ARF	Active Tutor data
ARFF	Attribute-Relation File Format
ARGO	ArgoUML project
ARH	Squash compressed archive
ARI	ARRIRAW image
ARJ	ARJ compressed archive
ARK	DS Squeeze archive
ARL	Aureal Aspen sound bank
ARMODEL	Kudan AR Model
ARP	Audition Play Data
ARPBANK	ARP2600V preset
ARQ	ARQ archive
ARS	Carmageddon Saved Game
ARSC	Android Package Resource
ART	AOL ART (Johnson-Grace compressed) bitmap
ARTASK	Remedy User Tool shortcut
ARTBORDER	ArtBorder data
ARW/SR2	Sony digital camera RAW image
ARX	ARX compressed archive
AS	Applix spreadsheet
AS2PROJ	FlashDevelop ActionScript 2 Project
AS3PROJ	FlashDevelop ActionScript 3 Project
ASAR	asar Electron Archive
ASC	ASCII Encoded HP 48 Object
ASC/AEXPK/PGP/PUB/TXT	PGP public key block
ASC/PGP/TXT	PGP message
ASC/TXT	PGP clear text signed message
ASCX	Microsoft ASP.NET Web User Control
ASD	ASD Archiever compressed archive
ASDATABASE	Microsoft SQL Server Analysis Services project
ASE	3D Studio Max ASCII Export file
ASE/ASEF	Adobe Swatch Exchange File
ASF	Acclaim Skeleton File
ASF/STR	Electronic Arts ASF video (generic)
ASH	ASH compressed data
ASHPRJ	Ashampoo Burning Studio project
ASK	askSam Windows database
ASLX	Quest Adventure Script
ASM	Solid Edge Assembly Document
ASN	Atlantis Word Processor Sound Scheme
ASPX	Microsoft ASP.NET Web Form
ASS	SubStation Alpha Subtitle (Unicode)
ASS/SSA	SubStation Alpha Subtitle
ASSET	Unity YAML Scene
AST	'Need for Speed: Underground' soundtrack
ASVF	Asphyre Sphinx Archive File
ASX	Advanced Stream Redirector
ASY	LTSpice Symbol
ATA	Antenna project
ATDF	ASCII Test Data Format
ATF	ATF Texture
ATH	Alienware AlienFX Theme
ATHTUNE	athtune script
ATL	Artlantis 3D scene (gen)
ATM	TerraGen Light and Atmosphere
ATN	Photoshop Action
ATP	ATRAC encoded audio
ATR	Atari ATR disk image
ATT	Calamus ASCII Translation Table
ATTR	iPhoto image data
ATX	VAPI/ATX Atari 8-bit disk image
AU	Audacity audio block
AUD	INRS-Telecom audio (10KHz)
AUM	Adobe Update Manager data
AUP	Audacity project
AUR	AutoREALM Map
AUS	AutoREALM Symbols
AUTOMATICDESTINATIONS-MS	Windows 7 Jump List
AUTOPLAY	AutoPlay Media Studio Project
AVASTSOUNDS	Avast! Soundpack
AVB	Avid Editor Bin
AVC	Kaspersky Anti-virus data base
AVF	AVF video
AVI	AVI Audio Video Interleaved
AVJ	AntiVir Job
AVL	Avira AntiVir Log status report
AVP	AntiVir Profile
AVRO	Avro serialized data
AVS	Winamp Advanced Visualization Studio File
AW	Microsoft Answer Wizard
AWD	Artweaver Document
AWL	AWL programming language (Var. 1)
AWLIVE	Active WebCam live capture
AWM	AllWebMenus project (v2.xx)
AWS	Ability Office Spreadsheet
AWSES	Active WebCam Settings
AX	DirectShow filter
AXE	AutoRoute Export file
AXF/BIN/GXB	GP32 eXecutable Binary
AXP	Avid / Pinnacle Studio Project
AXS	AXS module
AXT	ZenWorks snAPPshot ASCII Application Object Template
AXX	AxCrypt encrypted
AY/EMUL	AY chiptune
AYL	Ay Emul play List
AYM	Z80 music code with AY music
AYS	Ay Emul Skin (v2.0)
AZA	QazaR compressed file
AZF	AirZip FileSECURE format (print quality)
AZW	Amazon Kindle eBook
AZW1/TPZ	Kindle Topaz eBook
AZW3	Amazon Kindle KF8 eBook
AZZ	AZZ Cardfile card
BAK	Microsoft SQL Server backup
BAL	B4A Layout
BALZ	BALZ compressed data
BANK	FMOD 5 Sound Bank
BAR	Total Commander button Bar config
BAS	BAS VBDOS Pro 1.0 Source
BASIN	HEC-HMS Basin model settings
BATTLE	Robocode Battle
BAV	The Bat! Antivirus plugin
BAW	BrainLED AlfaWave session
BB	Artlantis BillBoard
BB/BIGBED	bigBed Track Format
BBL	BibTeX Generated Bibliography
BBSONG	Beepola chiptune
BBX	BrainBox neural net
BC	Big Crunch compressed file
BCIF	BCIF bitmap
BCK	BackupExpress Pro
BCO	Bitstream Compressed Outline font
BCPKG	Beyond Compare Settings Package
BCS	BCS Video
BCT	Adobe Bridge cache
BCW	BusinessCards MX project
BD	Benn Daglish chiptune
BDC	Babylon Dictionary
BDF	Brother Embroidery File
BDL	Grid 2 Bundle
BDOC/ASICE	Binary Document container
BDR	Microsoft Border art
BDS	Benn Daglish SID chiptune
BDSPROJ	Borland Developer Studio Project
BEAM	Compiled Erlang code
BED	UCSC BED Annotation Track
BEE	The Bee Archiver compressed archive
BFA	Blowfish Advanced CS encrypted
BFA/TMP	BigFix File Archive
BFF	AIX Backup File Format
BFI	Brute Force and Ignorance video
BFLI	Big Flexible Line Interpretation bitmap
BFX	Bitware BitFax page(s)
BGA	OS/2 Bitmap Graphics Array (generic)
BGDB	Global Virtual Accademy e-learning file
BGI	Borland Graphics Interface driver (v2.x)
BGL	Babylon Glossary
BH	BlackHole compressed archive
BHF	PCAnywhere32 Data
BHL	BlockHashLoc recovery info
BHO	Behold Organize data
BHW	Blophome published project
BIB/BIBTEX/TXT	BibTeX references
BIDULE	Bidule layout
BIF	BIF bitmap ASCII info
BIG	SGA archive - Home World 2 game data
BIG/VIV	VIV/BIGF Electronic Arts Game Archive
BIK	Bink video
BIK/BIK2/BK2	Bink2 video
BIN	AVG update package
BIN/BLI	Thomson Speedtouch serie WLAN router firmware
BINDS	Elite: Dangerous controls bindings
BINVOX	BINVOX voxel file format
BIO	BioArk compressed archive
BIP	KeyShot 3D scene
BIX	BIX Archiver compressed archive
BIZ	Division dVS 3d model
BK2	BizHawk movie capture
BKF	Windows NTBackup archive
BKG/GUL	Samsung document
BKI	IBM Softcopy Reader (Bookmanager) Bookshelf (and Book) index file
BKM	BizHawk movie capture (obsolete)
BKR	ReplaceEm fileset
BKRIFF	Brass preset
BKS	IBM Softcopy Reader (Bookmanager) book file
BLB/BLORB/GBLORB/GLB/ZBLORB/ZLB	Blorb interactive fiction package
BLD	3D Home Design Suite model
BLEND	Blender 3D data
BLI	BLINK compressed archive
BLIF	Berkeley Logic Interchange Format
BLOB	Cosmic Blobs model
BLP	Blizzard Picture (type 1)
BLSC	Blue Scan drawing
BLT	Saved AIM Buddy List
BLU	Apple Binary 2 Library Utility archive
BLUE	EVE Online data (generic)
BLUEJ	BlueJ Package
BLZ	BriefLZ compressed data
BMA	BMA Archiver compressed archive
BMD	Nintendo GameCube/Wii 3D Model
BMF	BMF v1.x bitmap
BMFC	AngelCode Bitmap Font Generator Configuration
BMG	Message string storage
BMM	Bleeper Music Maker music
BMML	Balsamiq Mockups prototype
BMP	Alpha Microsystems Bitmap
BMP/EPA	Award BIOS logo bitmap (v2)
BMS	QuickBMS script (with XML header)
BMSK	STK Body Mask format
BMU	Aurora Engine BioWare Music Unit (v1.0)
BMX/BMW	Buzz song
BND	DB2 Bind File
BNDL	Need For Speed Bundle
BNK	Adlib instruments/sound bank
BNR	BannerMania banner
BNZ	bonZai3d project
BOA/B**	BOA Constrictor Archiver compressed archive
BOM	Bill Of Materials
BONK	Bonk compressed audio
BOOK	FrameMaker book
BOOTSKIN	BootSkin Vista theme
BOT	Soldat Bot Information
BP	BP SoundMon 2 module
BP3	BP SoundMon 3 module
BPD	Buero Plus NexT FlashFiler database file
BPF	Binary Point File 3
BPG	Better Portable Graphics bitmap
BPL	Borland Package Library
BPM	Bizagi Process Modeler document
BPP	BPP bitmap
BPR	C++ Builder XML Project
BQY	BrioQuery
BR6	Bryce 6 Scene
BRAINZIP	PersonalBrain document
BRC	BlueCielo Meridian BriefCase - File Archive Library (v1.00)
BRD	BorderMaker project
BREP	Open Cascade Technology 3D model
BRN	Gabriel Knight 3 barn game data
BRP	BRender BRP
BRRES	Mario Kart Wii BRRES model data
BRSTM	BRST Audio Stream
BRT	BeRoTracker module
BS	Infinity Engine compiled character Script
BS/BIN	PrintFox (C64) bitmap (RLE encoded)
BS4	Mikogo session video recording
BSB	MapInfo Sea Chart
BSC	BinSCII encoded file
BSDIFF	bsdiff patch
BSDL	Boundary Scan Description Language
BSG	Besiege machine
BSI	Future Composer (BSI) module
BSN	BSA Packing program compressed archive
BSS	Beathoven Synthesizer module
BSX	BrickStore XML data
BT	BluffTitler Show
BTAPP	uTorrent Application
BTD	Power To-Do List Data
BTG	Binary TerraGear - FlightGear scenary data
BTPC	BTPC encoded bitmap
BTR	FrontPage Binary-tree index
BTSEARCH	BitTorrent Search engine specificiation
BTW	BarTender label format
BTX	DB/TextWorks Database Term and Word Index
BUNDLE	Krita resource Bundle
BUZ	Buzzic 1.x module
BUZ2	Buzzic 2 module
BVH	Motion Capture File
BVY	Breevy text snippet
BW	Silicon Graphics B/W bitmap
BWE	Black and White 2 Environment data
BWG	BrainWave Generator
BWS	Photo Enote (Enot) external photo viewer settings
BWW	Bagpipe notation
BX	BX Embrilliance font
BXB	BasicX compiled bytecode
BXL	Accelerated Designs PCB Library
BXU	PictureGear Studio file
BXY	NuFX archive (with Binary II header)
BZ	BZIP compressed archive
BZ2/BZIP2	bzip2 compressed archive
BZA	BZA compressed archive
C10	Virtual MC-10 tape image
C3	3D model
C32	Syslinux COM32 module (generic)
C3D	Chem3D Format
C3XML	Chem3D XML format
C4*	Clonk game data
C4D	CINEMA 4D model (generic)
C4M	Clonk Material definition
C64	CCS64 Freeze saved state
CA1	Crack Art bitmap (low-res)
CA3	Crack Art bitmap (hi-res)
CAB	InstallShield compressed Archive
CAD	CadStd drawing
CAF	Cal3D Animation File
CAG	Capella gallery data file
CAI	SeeYou flight data
CAJ	CAJ database
CAKEWALKSTUDIOWARE	Cakewalk Studio Ware panel
CAL	Microsoft Project 4.0 for DOS Calendar
CAL/CALS	CALS raster bitmap
CAMM	Crystal Alien Map Maker project (INI)
CAMPROJ	Camtasia Studio Project
CAMREC	Camtasia Studio Screen Recording
CAP	Capella sheet data file
CAPROJ	Construct 2 Project
CAPX	Construct compressed game project
CAPX/CAPXML	Capella CapXML music notation
CAQ	Aquarius Cassette tape image
CAR	Atari Cartridge
CAS	Atari Cassette tape image
CAT	Elcomsoft ADC Advanced Disc Catalog
CATALOG	Amiga Catalog translation format
CATDRAWING	CATIA Drawing (generic)
CATPART	CATIA Part Description (generic)
CATPRODUCT	CATIA Assembly (v5 r16)
CAZ	CAZIP compressed file
CBA	Chuck Biscuits/Black Artist module
CBC	Clam Antivirus ByteCode signatures
CBCX	Comic Book Creator document
CBDS	Comic Book DS
CBF	CoffeeCup Button Factory button
CBMPRJ	CBM prg Studio Project
CBOARD	Final Cut Pro X Color Board preset
CBP	Code::Blocks Project
CBPROJ	Borland C++ Builder project
CBS	Codebreaker save
CBV	ChessBase Archive file
CBXML	CodeBox snippet library
CC3D	CompuCell3D project
CCA	Multimedia Fusion - Click'n'Create file
CCB	CocosBuilder info
CCBI	CocosBuilder exported info
CCC	TeslaCrypt/Cryptowall encrypted
CCD	Elaborate Bytes/SlySoft CloneCD CDImage (description)
CCF	Component Configuration File (generic)
CCM	Creative Commons Module music
CCPROJ	Visual Studio Cloud service project
CCRF	Saba Centra Recording Studio recording
CCS	CableNut Custom Settings
CCT	Calamus Codepage Table
CCVF	CompuColor Virtual Floppy disk image
CD	Class Diagram (UTF-8)
CD5	Chasys Draw IES drawing
CDA	CD Audio track shortcut
CDB	CodeSuite DataBase - BitMatch
CDCOM	Circuit Diagram Component (compiled)
CDD	Cadifra Diagram
CDDS	Midtown Madness 3 data
CDE	MicroHof Code
CDF	Affymetrix Chip Definition File (Text)
CDF/NC	NetCDF Network Common Data Form
CDF-MS	ClickOnce Compiled Manifest
CDK	Calamus Document
CDM	NTI CD Maker image file
CDO	Crescendo Music Notation score
CDPZ	ConceptDraw Project document (Zipped)
CDR	CorelDRAW drawing (zipped)
CDRZIP	DICOM Images zipped archive
CDS	Borland Client Dataset data
CDV	Javelin Country Driver
CDW	CeledyDraw drawing
CDX	CDX Internet Archive index
CDXL	Amiga CDXL video (Std, HAM, bit planar)
CDXML	ChemDraw XML
CDZ	pSX compressed CD image
CE1	ComputerEyes Raw Data Format low-res bitmap
CE2	ComputerEyes Raw Data Format hi-res bitmap
CEB	Apabi eBook
CED	EEGLAB Channel Data
CEG	Continuous Edge Graphic bitmap
CEL	Affymetrix Probe Results (Bin)
CER	Internet Security Certificate
CER/MSI	MSI/Accelrys Cerius II
CF1	Common Loudspeaker Format binary (v1, Type 1)
CF2	Common Loudspeaker Format binary (v1, Type 2)
CFDG	Context Free design grammar
CFF	BoomTracker 4.0 module
CFG	Ableton project configuration
CFL	Compressed File Library 3 compressed data
CFM	ColdFusion Template
CFML	ColdFusion Markup Language
CFN	Calamus Font Data
CFOSSPEED	cFosSpeed registration key
CFP	CoverFactory Project
CFT	CFast Animation
CGC	Colour Genie high level tape image
CGM	Computer Graphics Metafile (Clear Text)
CGP	DVDFab Change Graphic Picture
CGR	Quest3D data
CGT	GOLD Parser Tables
CGX	CommonGraph format
CH3	Harvard Graphics Chart (v3.x)
CHAIN	Chain format
CHART	MacStitch/WinStitch design
CHESSTITANSSAVE-MS	Microsoft Chess Titans Saved game
CHI	ChiWriter document (v3.x or older)
CHK	PolySpace check results
CHL	Black and White 2 game data script
CHM	Windows HELP File
CHN	ApBasic Chain file/module
CHORDS	SuperJAM! Chords
CHR	BGI (Borland Graphics Interface) font
CHT	Harvard Graphics Chart (v2.x)
CHT/SCT	SPSS template
CHZ	ChArc compressed archive
CI	CyberTracker Instrument
CIF	BoomTracker 4.0 instrument
CIL	Clip Gallery Download Package
CINE	Phantom Cine video
CINEMA4D	Cinema 4D project
CIP	Cisco IP Phone Image bitmap
CIRC	Logisim Circuit
CIRCUIT	KTechlab circuit design
CISO/CSO/WBI	CISO Compressed ISO CD image
CIV5MAP	Civilization 5 Map
CIV5PROJ	Civilization 5 Project
CIV5SAVE	Civilization V saved game
CIV5SLN	Visual Studio Civilization 5 Solution
CKBX	Cricket Audio XML Bank Description
CKD	Cadkey Design file
CKF	Casio Keyboard File
CKT	CircuitMaker schematic
CL2	Hy-Tek Meet Results
CL2ARC	Comic Life 2 Archive
CL4	Easy CD Creator 4 Layout
CL5	Easy CD Creator 5 Layout
CLA	CLASS336 Markup Language
CLASS	Java bytecode
CLB	COM+ catalog file
CLBX	MP3 Automagic CD Cover Creator label
CLF	ListPro data
CLG	Collage Maker document
CLIPS	Programmer's Notepad text Clips
CLK	ClickFORMS data
CLKX	Crick Software Clicker File
CLMOV	Clan Lord movie - Visiostone
CLO	SPSS Chart Look
CLP	DeskMate clipart
CLPI	Blu-ray Clip AV stream
CLR	3ds UI colors
CLS	Visual Basic class definition
CMA	OCaml bytecode (library)
CMAP/PAL/IFF	IFF Color Map
CMATE	ControllerMate programming
CMB	Reason Combinator Instrument Patch
CMBL	Vernier Logger Pro data
CMC	Comic Collector Collection data
CMD5	CrystalMaker Data format (v5-6)
CMD5/CMDF/CMMF	CrystalMaker Data format (generic)
CMDF	CrystalMaker Data format (v2-4)
CML	Chemical Markup Language
CMML	Continuous Media Markup Language
CMP	AUKTOOLS 2000 compressed archive
CMPROJ	Channel Master Project
CMR	SeeYou Raster Map
CMS	Creative Music System music
CMU	CMU Window Manager bitmap
CMV	Corel Movie animation
CMX	Corel Metafile Exchange Image (Legacy)
CMZ	Compressed archive
CN	Copy Numbers format
CNC3REPLAY	Command and Conquer 3 replay
CNDF	Compressed Channel Data File
CNF	Lotus 123 configuration (V1)
CNT	Help File Contents
CNV	DB2 Conversion File
CO	Cult3D object
COB	Caligari TrueSpace Object
COD	Atlantis Word Processor encrypted document
COD/LOD	Microsoft p-code (Multiplan)
COK	Cookeo recipe
COL	Grand Theft Auto 3 collision data
COM	16bit COM executable BAT2EXEC v1.3
COMFYCAKESSAVE-MS	Comfy Cakes saved game
COMICDOC	Comic Life Document
COMICLIFE	Comic Life Document
COMPANYLOGO	CompanyLogoDesigner project file
COMPILED	Flare3D Shader Language Compiled
COMPOSITEFONT	Windows Composite Font
COMX	COMX-35 program
CONF	fswebcam configuration
CONTACT	Windows Contact
CONTROL	HEC-HMS Control specifications data
COOKIE/TXT	libwww-perl cookie_jar
COP/ET/ETC/T	E-Tracker chiptune
COR	WinArcadia Recording/macro
CORE	Core Design module
COS	WinArcadia Saved State
COW	Copy On Write disk image
CP2	PSFTools CodePage map
CPC/CPI	Cartesian Perceptual Compression Image bitmap
CPE	Windows FAX cover

CPG	Cool Page Project
CPH	Corel PrintHouse image
CPI	AVCHD Clip Information
CPIO	CPIO archive (binary)
CPJ	WinOnCD Project
CPK/CAK/FILM	Sega CPK video
CPL	Corel Color Palette
CPR	CPC Plus Cartridge image
CPS	Corel PhotoHouse image
CPT	Corel Photo Paint bitmap (new)
CPX	Atari Control Panel applet
CPX/FLT	ImgStar bitmap
CR2	Poser character rigging
CRAFT	Kerbal Space Program (KSP) spacecraft
CRASH	Mac OS X crash log
CRD	PPC Organiser Card
CRE	Infinity Engine Creature (generic)
CRF/CCRF/PRN	Calcomp raster bitmap
CRG	Calamus Raster Graphic bitmap
CRI	Calamus Raster Information
CRP	Colossal Raw asset Package
CRPLUGIN	ComicRack plugin
CRS	StepMania Course
CRT	C64 Cartridge image
CRU	Crush compressed archive
CRV	Corel PhotoPaint Tone Curve
CRV3D	Vectric Aspire 3D drawing
CRW	Canon RAW format
CRX	Google Chrome Extension
CRYPT7	WhatsApp encrypted database
CRYPTOMITE	CryptoMite encrypted
CRYSISJMSF	Crysis saved game
CRYSISPSF	Crysis Warhead saved game
CS	ColorSchemer Studio Color Scheme
CS0	Callus savestate
CSAPLAN	SPSS Analysis Plan
CSCFG	Azure Service Configuration Schema
CSCHEME	Caffeine Scheme
CSD	Cabbage script
CSDEF	Azure Service Definition schema
CSDL	ADO.NET Conceptual Schema Definition Language
CSF	Cal3D Skeleton File
CSH	Adobe Photoshop Custom Shape
CSM	CASL compiled PalmPilot program
CSO	DirectX Compiled Shader Object
CSP	AudioZip encoded audio
CSPLAN	SPSS Sampling Plan
CSPROJ	Visual Studio C# Project
CSS	Cartoon Studio Script
CSV	Weather Analytics data
CSW	Compressed Square Wave (v1.1)
CT	Cheat Engine Cheat Table
CTB	AutoCAD Color-Based Plot Style
CTD	CherryTree note (XML)
CTF	WhereIsIt? catalog file
CTG	Canon Photo Info file
CTI	Bitz and Pixels XML (ASCII)Report Template Info for collectorz.com products
CTL	Phoenix Visual Designer third party control
CTM	OpenCTM 3D mesh
CTP	CrazyTalk Project
CTS	TreeSheets project
CTT	MSN Messenger Saved Contact List
CTW	Context tree weighing (CTW) compressed file
CTX	Gasteiger group CTX
CTXT	BlueJ Class Context
CUB	Isis Cube data
CUBE	Gaussian Cube data
CUE	ISO CDImage cue/description - Data
CUEPROFILE	Corsair Utility Engine Profile (v2)
CUI	AutoCAD Custom User Interface
CUR	Windows Cursor shape
CURSORFX	CursorFX theme
CURXPTHEME	CursorXP theme
CUS	Delitracker Customplay module
CVA	Compaq Diagnostics
CVC	Cybiko Video Container video
CVD	Calamus Vector Document
CVF	Jet-VoiceMail audio data
CVG	Calamus Vector Graphic
CVP	WinFax Cover Page
CVS	Satori Paint Canvas
CVT	GEOS ConVerT container format
CVX	Covox ADPCM encoded audio
CWD	Cardwar Cards deck
CWK	Claris Works document
CWP	Cakewalk SONAR project
CWR	WrapCandy template
CWS	Combustion v2 WorkSpace project
CWW	Crossword Weaver puzzle
CWY	SongTrix Style
CXF	CTXf compressed archive
CXI	Coherent X-ray Imaging format
CXT	Adobe Director Protected Cast
CYG	CryoGen ECC data
CYP	Crocodile Physics Simulation
CZD	Crash Zone Drawing
CZIP	ZipGenius encrypted compressed archive
DAT/FH11	Freehand 11 Project
DAT/LOG	LabVIEW binary Datalog
DAT1	NeoRAGEx savestate
DATA	RHVoice data
DATABASE	SQL Server Data Tools Database info
DATATYPE	Amiga Datatype
DAV	Dahua DVR video
DAX	DAKX compressed audio
DAZIP	Dragon Age: Origins game data
DB	Everything index
DB/DIGI	DIGIBooster module
DB_INFO	Quartus DataBase Info
DB3	SeqBox SBxScan recovery info
DBA	DateBook Archive
DBB	Skype user data
DBD	Dan Bricklin's Demo 2 demo
DBF	Psion serie 3 Database
DBG	ASIC compiler debug info
DBH	PC-File database header
DBI	Isearch Database Info
DBK	Orcad Schematic Capture Backup
DBK/XML	DocBook document
DBM	DigiBoosterPro module
DBO	DB/TextWorks Database Directory
DBR	DB/TextWorks Database
DBS	DB/TextWorks Database Textbase Structure file
DBX	Outlook Express Database
DC	DeltaCad drawing
DC3	Diamond Caves 3 levels group
DC42/IMAGE	DiskCopy 4.2 1440k MFM disk image
DC5	DataCAD Drawing
DCA/RFT	IBM Document Content Architecture / Revisable Form Text
DCD	DCD binary trajectory format
DCE	DriveCam video
DCF	D-LIB bytecode (generic)
DCH	DipTrace Schematic
DCM	KiCad Documentation
DCM/DIC/DICOM	DICOM medical imaging bitmap
DCOL/IFF	IFF Direct Color bitmap
DCR	Director - Shockwave movie
DCU	Borland Delphi 6 Library
DCUPDATE	DcUpdater local configuration
DCX	Graphics Multipage PCX bitmap
DD2	Dave 2 Huffman compressed game data
DDD	ColdFusion Verity engine fields definition
DDF	GEM Driver Definition
DDOC	DigiDoc digital signature
DDP	Delphi Diagram Portfolio
DDS	DirectX DirectDraw Surface
DDT	Diagram Designer Template
DDY	ASHRAE Design Conditions Design Day data
DEB	Debian Linux Package
DEEP	IFF DEEP animation/bitmap
DEH	DeHackEd patch
DEM	Half-Life 2 Demo
DEPEND	Code::Blocks Dependencies
DEPLOYPROJ	Deployment Manager configuration
DEPOT	HP-UX Software Distributor catalog depot
DER	DER encoded X509 Certificate
DES	GRAFIT layout
DESC	Battlefield 2 map Description
DESKTHEMEPACK	Windows 8-10 Desktop Theme Package
DESKTHEMEPACK/THEMEPACK	Windows Desktop Theme Package
DESKTOP	KDE/GNOME desktop entry
DESKTOP/DXTHEME	DesktopX Theme
DEV	Bloodshed Dev-C++ project
DEVELOPERPROFILE	Xcode Developer Profile
DEVELVE	Develve data
DEX	Dalvik Dex class
DF1	Omnis Studio database
DFA	DreamForge video
DFD	ATK Data Flow Diagram
DFF	DSD Interchange File Format audio
DFM	Borland Delphi - C++ Builder Form (var.1)
DFONT	Macintosh OS X Data Fork Font
DFT	Solid Edge Draft Document
DFU	Device Firmare Upgrade format (generic)
DFW	Derive for Windows (generic)
DFXML/XML	Digital Forensics XML
DFXP	Distribution Format Exchange Profile
DGC	DGCA Digital G Codec Archiver
DGML	Directed Graph XML document
DGN	Bentley MicroStation CAD drawing
DGR	PhoneTools Internal Graphic Format
DGS	Dagesh document
DH	David Hanney chiptune
DI	XL/ST link / XLDJ Disk Image
DIA	Dia drawing (uncompressed)
DIAGCAB	Diagnostic Cabinet
DIC	Kingsoft PowerWord Dictionary
DIG	Sound Designer I (Mac) audio
DII	Summation Document Image Information Load File
DIN/BIN	DESI-III drawing
DIP	DipTrace PCB
DIS	DRI Display Manager Display
DIT	Studio Printer Dither method
DITA	DITA document
DITAMAP	DITA map
DJR	Macromedia Director Java Resource - Video
DJVU/DJV	DjVu (gen)
DJX	Fluid Entertainment Dundjinni - included Art
DL	Dave Lowe module
DLC	DLC - DIGILINEAR compressed archive
DLDI	Dynamically Linked Device Interface
DLG	Infinity Engine Dialogue (v1.0)
DLIS	Digital Log Interchange Standard well format
DLL	ATI The Compressonator plugin
DLS	DownLoadable Sound bank
DLT	DELTA binary dataset
DM	Delta Music module
DMB	BYOND game byte-code executable
DMD	Oracle SQL Developer Data Model
DMF	D-Lusion Music Format module
DMG	Macintosh Disk image (BZ2 compressed)
DMI	DMIS input data
DMK	TRS-80 DMK 5"1/4 DD disk image
DMM	DropMind Mind Map
DMP	DC2N DMP format (v0)
DMP/MDMP	Windows Minidump
DMSD	VideoWave DVD Project
DMT	DeLorme Street Atlas Map Transfer
DMU	Digital Mugician module
DMX	Data Model eXchange encoding format
DMZ	DMesh 3d model
DNH	Touhou Danmakufu script
DNL	DNL eBook / eCatalog / eCard / eBrochure
DNM	YS FLIGHT Dynamic 3d model
DNP	Eudemons Online game data
DOC	Better Working Eight-In-One Document
DOC/DCX	Microsoft Word for DOS Document
DOC/ST	1ST Word Plus Document
DOC/WS	WordStar document (gen)
DOC/WS2	WordStar 2000 document
DOC/WS5	WordStar 5 document
DOC/WS7	WordStar 7 document
DOCKERFILE	Dockerfile
DOCM	Word Microsoft Office Open XML Format document (with Macro)
DOCX	Word Microsoft Office Open XML Format document
DOCZIP	dockzip format
DOF	Delphi Options File
DOTFUPROJ	Visual Studio Dotfuscator Project
DPAL	Dragon UnPACKer color Palette
DPD	Ovation Pro document
DPK	Delphi Package
DPL	Borland component
DPLSAVE	Driver: Parallel Lines savegame
DPR	Delphi Project source
DPROJ	Delphi Project
DPS	DivX Skin
DPT	Kingsoft Presentation template
DPW	Decision Pad Worksheet (v2.x)
DPX	Digital Moving Picture Exchange bitmap (big endian)
DR	Open Digital Rights Language
DR2D/IFF	IFF 2-D Object standard format
DRC	Dirac video
DREAM	Stardock's DeskScapes animated wallpaper
DRF	Dynojet Run File
DRG	AllyCAD Drawing
DRL/DLP	Drazlace bitmap
DRN	DRAKON Editor diagram
DRO	D-Robots robot
DROID	Droid profile
DRPM	Delta RPM Package
DRR	Altium Designer Drill Report
DRU	EAGLE Design Rules
DRV	Javelin screen Driver
DRW	CADS Planner drawing
DRW/DSF	Micrografx Designer Drawing (v3.1)
DRX	DaVinci Resolve eXchange data
DRY	PPC Organiser Diary
DRZ	Drazpaint (C64) bitmap
DS	Furcadia DragonSpeak Script
DS_STORE	Mac OS X folder information
DS1/DS4	DeSmuME savestate (gen)
DS2	Dream Station 2.0 module
DS4	Micrografx Designer Graphics (ver 4)
DSA	DAZ Studio script
DSE	Dyalog APL Session
DSF	DSD Storage Facility audio
DSF/MINIDSF/DSFLIB	Dreamcast Sound Format
DSG	Doom SaveGame
DSK/CPY/CQM	CopyQM disk image
DSK/DTK	TI-99 PC99 Track Dump Format
DSK/IMG	CP Backup disk image
DSK/TIDISK	TI-99 V9T9 Sector Dump Format
DSM	DeSmuME Movie capture
DSN	ISIS Schematic file
DSP	MS Developer Studio Project
DSPACKAGE	Desktop Sidebar skin
DSR	Visual Basic Active Designer file
DSS	Digital Sound Studio module
DST	AutoCAD Sheet Set
DSW	Microsoft Developer Studio Workspace
DSX	Vivid DiffSet
DSYM	Digital Symphony relocatable module
DTB/DTBO	Device Tree Blob/Overlay
DTC	Weresc CADE drawing
DTD	TechSoft 2D Design drawing
DTF	Symantec QandA Database File
DTG	Desktop Guitarist music score
DTM	Digital Tracker 1.9 module
DTM/MBM	Digitrax module
DTP	PDP-8 DECtape tape image
DTPROJ	SQL Server Data Tools Project (ASCII)
DTQ	Visual Database Tools Query
DTS	DTS encoded audio
DTSCONFIG	SQL Server Integration Services Configuration
DTSX	SQL Server Integration Services package
DTYP	dtread Type Descriptor
DUC	Action Replay Saved gamestate
DUMP	SVN dump format (generic)
DUR	DURILCA compressed file
DV	Digital Video
DVB	AutoCAD VBA macro
DVDS	DVDStyler Project
DVF/MSV	Sony Compressed Voice File
DVG	GraphicWorks Vector Drawing
DVI	Device Independent Document (TeX/LaTeX compiled)
DVMS/VMS	Variable Slope Delta Modulation audio
DVR	DVR-Studio stream
DVR-MS	Microsoft Digital Video Recording
DVTCOLORTHEME	Xcode Color Theme
DWA	Project Dogwaffle animation (generic)
DWD	DiamondWare Digitized audio
DWF	Autodesk Design Web Format
DWFX	Design Web Format XPS
DWG	AutoCAD 2000-2002 Drawing
DWG/PCB/SCH	CIRCAD data (v3.x)
DWI	Dance With Intensity song
DWL2	AutoCAD drawing lock
DWP	DarkWave Studio module
DWS	Dyalog APL WorkSpace
DWZ	Ulead DVD MovieFactory project
DXA	DXA video
DXE	AutoCAD Data Extraction template
DXF	AutoCAD Drawing eXchange Format (binary)
DXG/CFG	Doxygen configuration settings
DXLS	DashXL Dashboard
DXM	DXM music
DXP	CDBurnerXP Data compilation
DXR	Macromedia Director Protected Movie (MAC)
DXS	DeleD scene
DYF	Audio DiffMaker file set
DYL	Psion Library
DYN	Dynamo program
DZ	Darius Zendeh module
DZPRJ	Deep Zoom Composer Project
E	STK Ephemeris format
E00	ArcInfo interchange format
E01	Expert Witness compression Format disk image
E24	Bitmapped Signum!2 printer font (screen)
E2P	PonyProg device file
E3	Emulator 3000 snapshot (binary)
E4XMI	Eclipse 4 Application Model Info
E57	LIDAR Point Cloud data
EAR	Java Enterprise Archive
EASM/EPRT	eDrawings part (v 2008)
EBC	Compiled MediaBasic Project
EBF	Efficient and Easy to use Binary Format
EBK/SAL/SCL/SLS/SME/SMEA/SPB/SPBA/SSC/SSM/SSN/SWI/SWP	Samsung Kies backup
EBO	Microsoft Reader eBook annotations
EBS2	E-Run 2.0 Script
EBUILD	Gentoo Linux ebuild package
EBX	Electronic Book Exchange
ECF	Embird Cross stitch Format
ECLIPSEPRODUCT	Eclipse product marker
ECP	EasyC Project
ECW	EclipseCrossword CrossWord
ED2K	eDonkey network download link
EDAT2	E-DataAid 2.0 data
EDB	ETABS model
EDB/SDB/STM	Extensible Storage Engine DataBase format
EDG	EDGE Diagrammer diagram
EDGE	Adobe Edge Project
EDI	UN/EDIFACT
EDMX	Entity Data Model
EDN	EDIF Netlist
EDOC	Electronically certified Document
EDX	EDraw Max drawing
EED	EEDraw Drawing
EFE	Ensoniq EPS family instrument
EFF	Infinity Engine Effect (v2.0)
EFG	Gambit Extensive Game File Format
EFP	SilkRoad effect
EFT	ChiWriter high resolution screen font
EFX	j2 Global Communications eFax
EGG	EGG compressed archive
EGISENC	egis encrypted data
EGLIB	Adobe Edge Animate Library
EGON	Egon animation
EGR	EGrid32 Form
EGRP/EOBJ/ECHR	Explorations RPG Game Engine resource
EIO	Evermore Software EIOffice document binder
EIP	Capture One Enhanced Image Package
EIT	Encharta database update
EJP	Elite Japan Crossword Puzzle
EJPG	Encrypted JPEG bitmap
EKB	ZMC VisualTablet data
ELC	Combustion 2 Particle Library
ELD	EasyLanguage Document
ELF	EurekaLog log file
ELI	DipTrace Component
ELM	FrontPage Theme-Pack
ELS/ELA	EasyLanguage Storage / Archive
EMA	EPLAN Macro
EMB	EMB Wilcom Design embroidery file
EMBL/EMB	EMBL sequence data
EMD	DATACOMP 1.0 compressed archive
EMDL	Softimage Exported 3D Model
EMF	HyperVision EMF ASCII Format
EMG	Delsys EMG format
EMI	Pocket Tanks emitter
EML	E-Mail message (Var. 1)
EMM	MindMaple document
EMOD	Quadra Composer module
EMS	Electronic Music System v6 module
EMULECOLLECTION	eMule Collection file
EMW	Resident Evil player model data
EMX	Rational Software Architect Model
EMY	Ericsson eMelody Ringtone
ENC	ENhanced Compressor compressed archive
ENC1	Kaspersky encrypted trace
ENCRYPTED	EasyCrypto encrypted
ENEX	Evernote Exported XML
ENF	EndNote Filter
ENG	Live For Speed Engine sound
ENL	EndNote Library
ENS	EndNote Style
ENW	Endnote Export Format
ENZ	EndNote Connection
EOC	EncryptOnClick encrypted
EOP	EveryonePiano music score
EOPM	EOP Music Master music score
EOT	ExamView Online Test
EOT/FNTDATA	Embedded OpenType font
EP	Pencil sketch
EP/EPW/EZP/TXT	EasyPlot save file
EPA	Award BIOS logo bitmap (136x126) (v1)
EPITASK	Telestream Episode Task
EPM	Electric Pipes Music
EPP	EasyPrint Preview
EPS	Adobe Encapsulated PostScript
EPS/PS	Encapsulated PostScript (with DOS style preview)
EPUB	Open Publication Structure eBook
EPV	IPLAY Enterprise Video
EPW	EnergyPlus Weather data
EPX	Rational Software Architect Profile
EQCONFIG	EQATEC Profiler configuration
EQF/Q1	Winamp EQ Settings File
EQG/PAK/PFS/S3D	EverQuest Game data
ER1/ERX	AllFusion ERwin data
ERD	Entity Relation Diagram
ERF	BioWare Entity Resource File
ERS	Earth Resource Mapping Raster
ERV	Earth Resource Mapper Vector
ERWIN	ERwin model
ES	E-Studio 1.x experiment
ES2	E-Studio 2.x experiment
ES3	e-Szigno signed document
ESB/WBD	eBeam Whiteboard
ESP	ESP - Extension Sort Packer compressed archive
ESQ/FIL	Yamaha e-SEQ music
ESS	Ekahau Site Survey File
EST	Microsoft Streets and Trips map
ESU	ESU electronic sounds
ESY	EmEditor Syntax file
ET	Easiteach lesson
ETA	Keyhole - Google Earth Overlay
ETD	Acrobat eBook Reader EBX Transfer Data
ETHERPAD	Etherpad document
ETL	Window tracing/diagnostic binary log
EU4	Europa Universalis IV saved game
EV2	Emblaze Video 2 video
EV3	LEGO Mindstorms EV3 project
EV3P	LEGO Mindstorms EV3 Program
EVO	Enhanced Video Object
EVT	Windows Event Viewer Log
EVTX	Vista Event Log
EVY	Envoy document
EWB	EasyWorship Bible text
EWNET	Ultiboard netlist data
EWPRJ	Compressed Electronics Workbench project
EX	Fashion Tracker module
EX_	Microsoft SZDD compressed (Haruhiko Okumura's LZSS)
EX4	MetaQuotes Language 4 compiled program
EXAM	ProfExam Exam
EXB	CAXA drawing
EXE	16bit DOS EXE ApBasic
EXE/COM	SymbOS Executable
EXE/OBJ	QDOS executable
EXM	HP Palmtop 95/100/200LX Sys.Manager compliant Executable
EXR	OpenEXR High Dynamic-Range bitmap
EXSD	Eclipse Extension Point Schema
EYB	Encarta Encyclopedia Yearbook and Web Links update
EYETVP	EyeTV scheduling metadata
EYETVR	EyeTV Recording metadata
EYW	EyesWeb patch
EYWX	EyesWeb patch (XML)
EZLOG	Skype Extras Manager log
EZP	GoLabel document
EZPX	GoLabel document (XML)
F01/F02/F99	HEC-RAS Flow file
F3D	Flare3D binary model
FA/FZA/MZA	Novastorm Media video
FABBPROJECT	netfabb Project
FACE	Facer watch Face
FACE/FAC	FaceSaver bitmap
FACET	Facet file
FACT	ElectricImage 3D file
FACTORY	Simplify3D Factory session data
FAMILYX	My Family Tree Family
FAR	Farandole Composer module
FARCONFIG	Far settings
FAS	AutoCAD Fast-load AutoLISP (FAS4)
FASTA	FASTA DNA sequence
FASTQ/FQ	FASTQ format
FAV	Outlook Shortcuts
FAXX/FAX/IFF	IFF Facsimile image
FB	Slim! compressed archive
FB2	FictionBook 2.0 eBook
FB2K-COMPONENT	foobar2000 component
FBC	FamilyTree Maker compressed backup
FBF	Free Backup Fix backup
FBI	Spring Engine unit Info
FBK	FamilyTree Backup File
FBL	iGO map
FBM/CBM	Fuzzy Bitmap
FBP7	FinalBuilder 7 Project
FBS	FBIde session
FBX	Autodesk - Kaydara FBX 3D format (Binary)
FC	Future Composer v1.4 module
FC0	FCE Ultra FC0 savestate
FC3MAP	Far Cry 3 map
FC7	FastCAD for Windows drawing (V7)
FCA	Omnis Web Client Form Cache
FCD	FidoCAD drawing
FCF	Thrustmaster TARGET profile
FCLR	Flowgorithm Color scheme
FCO	FIASCO image/video
FCP	Final Cut project
FCPXML	Final Cut Pro X XML project
FCS	Flow Cytometry Standard format
FCSTD	FreeCAD Standard document
FCV	ColecoVision Font
FCW	FastCAD for Windows drawing (generic)
FD2	EasyPrint PictureMate borders
FDAT	Fiasco Database: data file
FDB	FT/Pro Form
FDD	FlexiDATA Database
FDF	Acrobat Forms Data Format
FDI	Formatted Disk Image (gen)
FDM	Floppy Disk Manager disk image
FDNEUT	FIDAP Neutral format
FDP	FMOD Designer Project
FDR	Final Draft document
FDS	FireDAC database
FDT	FormDocs template
FDX	Final Draft Script
FE_LAUNCH	FCS Express Layout Link
FEA	PLS-CADD Feature code
FEATURE	Gherkin Feature
FED	FORMIK form
FEM	Algor FEMPRO model
FET	FET Timetable
FF	Call of Duty game data
FFDATA	ABBYY eForm Filler data
FFE	Microsoft DirectInput Force Feedback Effect
FFL	Fast Find document List
FFN	FIFA game serie Font
FFP	FLAC Fingerprint
FFS_GUI	FreeFileSync configuration
FFT	IBM Final-Form Text document
FFX	Microsoft Fast Find Index v1.x
FFXML	Filter Forge filter
FG	Fred Gray module
FH*	Freehand (MX) Project (generic)
FH10	Freehand 10(MX) Project
FH3	Freehand drawing (v3)
FIB/FID/FIH/FIP/FIV	File Investigator data (generic)
FIC	Hyper File database
FID	Felix format spectra
FID/SPC/2D/001/002/003	NUTS format
FIDX	Fiasco Database: index File
FIF	Fractal Image Format bitmap
FIG	Cabri figure
FIL	AVG Antivirus Vault file
FILM	Amiga Murder video
FILTERS	Visual Studio C++ project Filters
FIM	Paul van Keep's Icon Heaven icons package
FIN	Corel saved find/search
FIT	Mechwarrior FIT data
FITS/FIT/FTS/FZ	Flexible Image Transport System bitmap (gen)
FLA	Flash Authoring / source material
FLAC/FLA	FLAC lossless compressed audio
FLAME	Fractal Flame Parameters
FLC	FIGfont control file
FLD	AVS Field data
FLF	FIGfont
FLI	Autodesk Animator
FLIPCHART	ActivInspire Flipchart
FLL	TextPipe Filter List
FLM	Adobe FilmStrip
FLOW	Expression SketchFlow data
FLP	Activstudio Flipchart
FLSX/FLWX	FileLocator Pro workspace/search (v8.0)
FLV	Flash Video
FM	Art Of Noise MF instrument (v1.x)
FM2	FCEUX movie capture
FM3	Formatting Data for Lotus 1-2-3 worksheet (V3)
FMB	Oracle Binary Form
FMD	Cumulate Draw's editable FMD format
FMK	FM-Kingtracker module
FML	FCEditor XML project
FMP	The Fractal Mapper map
FMP12	FileMaker Pro database (v12)
FMT/FJ3	Formatting data for Lotus 1-2-3 worksheet (V2)
FMX	FileMaker Pro 32-bit plug-in
FMZ	Form*Z Project
FN	STK Facility Network
FN3	Harvard Graphics Font (v3.x)
FNC	Vue D'Esprit 4 function definition
FNF	PTC FEM Neutral Format model
FNK	FunkTracker module
FNS	Free Notes document
FNT	BMFont Font control data (text)
FODP	OpenDocument Flat XML Presentation
FODS	OpenDocument Flat XML Spreadsheet
FODT	OpenDocument Flat XML Document
FON	Beyond Words Composer Font
FONT	Amiga bitmap Font
FORM	Gambas form (v2)
FOS	Fallout 3 save game
FOT	Win 3.x Installed TrueType Font
FOUNTAIN	Fountain Script
FOX	Furcadia Art
FP	FinePrint saved - output file
FP2/FUN	Funpaint 2 bitmap
FP3	FileMaker Pro 3 database
FP5	FileMaker Pro database (v5)
FP7	FileMaker Pro database (v7-11)
FPAGE	XPS FixedPage object
FPF	IKEA Kitchen Planner Document
FPG	DIV Games Studio Graphics Library
FPK	PerFORM Communicator File Packet
FPL	foobar2000 playlist
FPPX	Fresh Paint Painting
FPRG	Flowgorithm Program
FPT	Farandole Composer pattern
FPX	Kodak FlashPix bitmap
FR3	FastReport 3 report
FREC	Fiasco Database: frequencies files
FRED	Fred Editor module
FREF	Freenet node Reference
FRESHROUTE	Navigon Fresh route data
FRF/FRL/FRP	PerFORM compressed database
FRG	Sound Forge project
FRL	FormFlow 1.x form
FRL/FRP/FRZ	FormFlow 2.x form
FRO	A-Robots Fighting Robot Object
FRX	Microsoft Visual Basic Form
FS	Final Burn savestate
FSB	FMOD Sample Bank Format
FSC	SimCity 3000 Freshness Score
FSD	COCO/COFE Flowsheet Document
FSF	Quartus Software Build Settings File
FSH	Electronic Arts graphics
FSM	Farandole Composer sample
FSN	Greeting Card Factory
FSP	Flash Slideshow Builder project
FSPROJ	Visual Studio F# Project
FST	FAST input
FSTF	Flexible Stream Transport Format
FSY	FileSync profile
FTC	FluxTime Clip
FTF	Sony FlashTool Firmware
FTI	FamiTracker Instrument
FTL	Family Tree Legends data
FTM	Face The Music module
FTR	File-Type Rule
FTS	Windows Help Full-Text Search index file
FTW	Family Tree Maker Family Tree
FUCHS/FT	Fuchs Tracker module
FUN	Cubify Invent model
FUZ	Bethesda Softworks FUZE voice
FVF	Fluke View data
FW	Forgotten Worlds custom music format
FW2	Framework II file
FW3	Framework III file
FX	Age of Wonders: Shadow Magic Effects
FXB	HALion Sampler patch - bank
FXCOP	FxCop project
FXCPROJ	FX Composer Project
FXE	GP32 Free eXecutable Encrypted
FXG	Flash XML Graphics
FXM	Fuxoft AY Language module
FXP	Steinberg Plug-in
FXR	WinFax Sent / Received document
FZ	Flexible Image Transport System bitmap (compressed)
FZB	Fritzing Bin module
FZBZ	Fritzing Bundled Bin
FZIP	Foxit Reader Add-on
FZP	Fritzing Part
FZPZ	Fritzing Bundled Part
FZZ	Fritzing shareable project
G	MicroPlanet Gravity news database
G01/G02/G99	HEC-RAS Geometry file
G2W	GeoplanW data
G3	raw Group 3 FAX bitmap
G3A	Casio Prizm add-in
G3W	GeospaceW data
G64	G64 1541 raw disk image
G8	Cubicomp PictureMaker green channel image data
G9B	G9B graphics format bitmap
GA/PG	STK Great Arc Propagator format
GA3	Graphical Analysis 3 document
GAB	WinDev Controls' Styles description
GADGET	Microsoft Vista Sidebar Gadget (CAB - Obsolete)
GAI	Adobe SING Glyphlet
GAL	GenePix Array List
GAM	Cyberboard Game
GAM/VEC	Vectrex game ROM
GAMBAS	Gambas application (v2)
GAN	GanttProject project
GAU	MS Flight Simulator Gauge
GAX	MS Age of Empires II: The Conquerors Expansion v1.0 Saved Game
GB/GENBANK/GP/GBK	GenBank sequence record
GBA	Game Boy Advance ROM
GBAP	GLBasic Project (XML)
GBC	GameBoy Color ROM File
GBD	Graphtec Binary Data
GBI	gBurner Image
GBP	gBurner Project
GBR	GameBoy Sound System GBR dump
GBS	GameBoy Sound System dump
GBT	GFI Backup Task
GBX	Cyberboard Gamebox
GCA	G Compression Archiver
GCAT	GUI Design Studio Catalogue
GCD	Garmin firmware update
GCF	ArcSoft Greeting Card Creator project
GCG	GCG Sequence Chemical file
GCL	DISGCL script
GCT	GenePattern GCT format
GCW	Microsoft Math worksheet
GCZ	GameCubeZip image
GD	STK database update information
GDB	GVA/GVA2000 Author lecture
GDF	General Data Format for biosignals
GDFMAKERPROJECT	Game Definition File Editor project
GDG	GDevelop Game project
GDL	Game Description Language
GDM	General DigiMusic module
GDOC	Google Drive Document link
GDP	GUI Design Studio Project
GDS	GDSII stream format layout (binary)
GDTB	gretl Binary Data
GEANY	Geany project
GED	Arts and Letters Graphics file
GEM	GEM metafile
GEMSPEC	Ruby Gem::Specification
GENERICTEST	Visual Studio Generic Test
GEO	GeoWorks GEOS FAX driver
GEO/V3D	Videoscape GEO mesh
GEOJSON	GeoJSON format
GETVIEWPORTINFO	Google Maps API data
GEXF	Graph Exchange XML Format
GFA	GFA-BASIC Amiga tokenized source
GFAR	Greenfoot Archive
GFF3	Generic Feature Format Version 3
GFI/GFIE	Greenfish Icon Editor Pro
GFS	GGFileSPlit File Fragment
GFT	GSP Family Tree
GFX	Explorations RPG Game Engine resource - Bitmap
GG	Google Gadget
GGP	GemCom Graphic bitmap
GGR	GIMP Gradient
GGZ	Garmin Zipped geocache
GHLAYOUT	Grasshopper custom Layout
GHO	Norton older Ghost image (first file)
GHS/001/002/003/999	Norton older Ghost image (split file)
GHX	Grasshopper program (XML)
GID	GID Help index
GIF	GIF animated bitmap
GIG	GigaSampler Sound bank
GIM	Playstation 3 icon
GIR	GObject Introspection information
GISE	ISE Project generated data
GITMODULE	git submodule properties definition
GLA	Sothink SWF Easy Project
GLADE	Glade UI design
GLIF	Glyph Interchange Format
GLL	EASE GLL loudspeaker format
GLOX	Microsoft Office SmartArt Graphics Layout
GLUE	GlueMon module
GLY/GLX	Microsoft Word for DOS Glossary
GM	Game Music
GM/GM2/GM4	Autologic bitmap
GM6	Game Maker 6 project
GMANIFEST	Google Desktop Gadget manifest
GMBL	Logger Lite data
GMC	Game Music Creator Music
GME	DexDrive memory card save game
GMI	GPS Tuner map calibration data
GML	Graphlet File Format
GMO/MO	GNU Gettext Machine Object file
GMP	GUEmap document
GNUMERIC/XML	GNUMERIC spreedshet (XML, ungzipped)
GO/PRB	Ishi Format Go game
GOB	Dark Forces Game data archive
GOCAD	GOCAD ascii data format
GOE	GOES Satellite bitmap
GOOMOD	World of Good addin
GOZ	ZBrush GoZ export template
GP3	Guitar Pro v3 tablature
GP4	Guitar Pro v4 tablature
GP5	Guitar Pro v5 tablature
GPD	Generic Printer Description - Unidrv minidriver
GPG	GNU Privacy Guard public keyring
GPI	Garmin Point of Interest
GPJ	jGRASP Project
GPL	GIMP Palette
GPM	Crossword Puzzle
GPOL	Bruker binary pole figure format
GPR	GenePix Results
GPX	GPS eXchange format
GQ	QLFC compressed archive
GRA	Chasys Draw IES Gradient
GRAFFLE	OmniGraffle Drawing
GRAMMAR	Synalyze It! Grammar
GRAMPS	GRAMPS XML
GRAPHML	GraphML graph
GRB/GRIB/GRIB1	Gridded Binary data
GRB/GRIB/GRIB2	Gridded Binary data 2
GRD	Adobe Photoshop gradient
GREENFOOT	Greenfoot Project
GREENSHOT	Greenshot screenshot bitmap
GRF	ExpressGraph Graph
GRID	GridMove grid template
GRINDX	Juice Grinder recipe
GRLE	Farming Simulator terrein data
GRO	Allegro MIDI music
GROUPPROJ	Borland Group Project
GRS	GetRight Skin
GRX	GetRight File List
GRXML	XML Grammar
GRZ	GRZip compressed archive
GSC	GS-Calc workbook
GSF	Grand Smeta data
GSF/GSFLIB/MINIGSF	Gameboy Sound Format
GSHEET	Google Drive Spreadsheet link
GSI	GPS Tuner map slices calibration data
GSLIDES	Google Drive Presentation link
GSM	ArchiCAD Library Object
GSN	Cyberboard Scenario
GSO	GoldenSection Organizer database
GSP	Geometer's Sketchpad Document
GSS	Geometer's Sketchpad Script
GT2	Graoumf Tracker 2 module
GTK	Beaver Sweeper module
GTKW	GTKWave Saved session
GTM	GPS TrackMaker map
GTP	Guitar Pro Tablature (v1.x)
GTR	Spectrum Global Tracker chiptune
GTX	Genetica 1.0 Texture
GUI	GUI Design Studio design
GUIDE	Amigaguide hypertext document
GUIKIT	Shapeshifter theme
GVI	Google Video
GVP	Google Video pointer
GW1/GW2/GW3	HomeBrew File Folder game data archive
GWB	InterWrite Reader document
GWI	Novell Groupwise File link
GWP	GoodWay Flight Planner flight plan
GWS	GateWay Settings
GX1	GX1 bitmap
GXD	General CADD Pro (generic)
GXF	General eXchange Format video
GYM	Sega Genesis/Mega Drive sound/music data
GZA	GZA compressed archive
H/HRP	Hrip compressed
H17	HDOS H-17 portable dump disk image
H264	Raw H.264/MPEG-4 AVC Video
H2P	Zebra2 Preset
H2PATTERN	Hydrogen Pattern
H2SONG	Hydrogen song
H5	HDF5 data file
H8T	H8 Tape image
HA	HA compressed archive
HAR	HTTP Archive format
HASH	EnCase forensics Hash
HCC	HydroCAD Data for prefabricated storage Chambers
HCD	HCD format firmware
HCG	HCLab document
HCOM	Huffman Compressed audio
HCP	HydroCAD Project
HCX/HQX	BinHex encoded
HDB	PC-File data (gen)
HDP	MAGIX Hard Disk Project Audio
HDP/JXR/WDP/WMP	JPEG XR bitmap
HDR	InstallShield setup header
HDR/PIC/RGBE/XYZE	Radiance High Dynamic Range bitmap
HDZ	KeyShot environment
HE5	Hierarchical Data Format Release 5
HEAD	HEAD AFNI medical metadata
HEARTSSAVE-MS	Microsoft Hearts Saved game
HEIC	HIEF bitmap (heic)
HEIF	HIEF bitmap (mif1)
HES	Hudson Entertainment System Sound Format dump
HEXDWC	Free Hex Editor Neo layout
HF2	L3DT compressed Heightfield Format
HFA	ERDAS Imagine Hierarchical File Architecture
HFE	HxC Floppy Emulator disk image
HFF	L3DT HeightField File
HFZ	HollywoodFX Plug-In
HG1	Hellgate London save game
HHB	LigPlot Hydrogen-Bonds data
HHP	Microsoft HTML Help Project
HIN	HyperChem molecule format
HIPC	Hippel COmpressed SOng module
HIR	C64 Hires bitmap
HIV/DAT	Windows NT Registry Hive (generic)
HJT	TreePAD document
HL7	Health Level-7 data (pipe delimited)
HLE	HomeBrew Level
HLF	FAR help
HLP	C-Worthy Help Librarian Data (v1.x)
HLX	Help Magician text file
HMK	Hallmark Card Studio file
HMP	Frontier 2 First Encounters Music
HMT	HighMAT file
HND	HNSKY Deep Sky Database
HNM	CRYO HNM4 video
HNM/HNS	CRYO HNM6 video
HNT	Magnetic Hint
HONMOD	HoN Modification Manager package
HOT	Anders Oland music
HPD	HP Document
HPGL/HPG	Hewlett-Packard Graphics Language
HPI	Hemera Photo-Object Image
HPK	HPACK compressed archive
HPKG	Haiku Delta Package
HPR	RoboHelp data
HPROJ	HOBOware Project
HPT	RoboHelp Topic Export
HPUB	HPub HTML Publication
HRF	Hitachi Raster Format bitmap
HRM	Polar Heart Rate Monitor format
HRU	HRU bitmap
HSB	HandStory eBook
HSC	HYSYS Simulation Case
HSF	HOOPS 3D Stream Format
HSI/JPG	HSI JPEG bitmap
HSM	HelpSmith Project
HT	HyperTerminal data file
HTC	HTML Component (ASCII)
HTM/HTML	HyperText Markup Language with DOCTYPE
HTML	HyperText Markup Language
HTR/HAPTAR	Haptek Compressed file
HUD	HUD Maker
HUH	HydroCAD Unit Hydrograph definitions
HUS	Husqvarna Designer I Embroidery Machine Format
HV	Amiga HAM Video
HVL	Hively Tracker module
HVS	High Voltage SID Collection update info
HWP	HWP document
HWT	Huawei EMUI Theme
HXN	Hexagon model
HXS	Microsoft compiled help format 2.0
HXT	Help Table of Contents
HYP	Acrobat spelling dictionary
HZF	neosat fixes
HZP	CrossStudio project
I3D	Instant3D document
I3F	I3 Fax file
IAF	Outlook 97 and 2000 E-mail Account Settings
IB3	ICDRAW group icon bitmap
IBCC	Apple Application Information Table
IBG	NASA PDS labeled bitmap
IBI	ICDRAW single icon bitmap
ICA	Citrix Independent Computer Architecture
ICC	Art Icons Pro - IconCollection
ICC/ICM/CC	ICC Color profile (generic)
ICL	Icons Library
ICN	DEGAS Elite Icon Definition
ICN/XBG	HP Palmtop 100/200LX Icon
ICNS	Mac OS X icon
ICO	OS/2 Icon
ICPR	Art Icons Pro - IconProject
ICR	NCSA Telnet Interactive Color Raster bitmap
ICS/VCS	iCalendar - vCalendar
ICSPKG	Intellitools Classroom Suite Package
IDF	Microsoft Instrument Definition File
IDML	Adobe InDesign Markup Language
IDN	Alpha Four Index Definition
IDW	AutoDesk Inventor drawing
IDX	Java Applet cache index
IES	IESNA Photometric data
IFF	"The Sims" object
IFICTION	iFiction Metadata
IFL	IncrediFlash animation
IFO	DVD Info file
IFS	DIV Games Studio Font Source
IFX	Imagine Effect
IGC	IGC Flight Track
IGM	Indigo Renderer Material
IGR	Intergraph SmartSketch Drawing
IGS/IGES	Initial Graphics Exchange Specification (IGES) data
IGTX/ITX/TXT/TEXT	IGOR Pro Text document
IGX	iGrafx document
IIF	QuickBooks Import/Export Interchange File
IIM	InShape IIM bitmap
IIQ	Intelligent Image Quality - Phase One RAW image
IKMP	IK Multimedia Preset
IL3	particleIllusion library
ILBM	IFF ILBM bitmap (variant)
ILBM/LBM/IFF	IFF InterLeaved BitMap
ILD/ILDA	ILDA image data transfer format
ILK	Microsoft Incremental Linker data
ILM	Opus Creator multimedia file
ILV	ILOG View
ILX	Interlex vocabulary
IMA	IncrediMail animation
IMA/IMG	Old DOS disk image
IMB	IncrediMail Address Book
IMD	ImageDisk disk image
IME	IncrediMail emoticon
IMF	Imago Orpheus module
IMG/DMF	Distribution Media Format disk image
IMG/RLE	ADEX bitmap
IMG/XDF	eXtended Density Format disk image
IMI	IncrediMail image
IMN	IncrediMail notifier
IMO	iMON Setting file
IMOVIEPROJ	iMovie project
IMQ	NASA Planetary Data System image
IMR	Impromptu report
IMS	IMS Content Package
IMW	IncrediMail sound (MIDI music)
IMX	iMindMap Map
IMY	iMELODY sound/music
IMZ	Compressed Disk Image (password protected)
IND	AOL thumbnails index
INDD	InDesign Document
INF	Adobe Type Manager Font Information
INFO	Amiga icon file (NewIcons type)
INI	Generic INI configuration
INP	InPage document
INS	InstallShield Script
INSTRUMENT	SuperJAM! Instrument
INT	Borland Interface unit
INX	Inkscape extension descriptor
IOBJ	Visual Studio Intermediate Object
IOC	Indicator Of Compromise
IOM	ZEMU IO Map
IP	IconPackager theme
IP2	Interpress format
IPA	iOS Application
IPD	BlackBerry Backup
IPDB	Visual Studio Internal Program Data Base
IPE	Microth Stroke Set
IPF	Interchangeable Preservation Format floppy disk image
IPJ	Autodesk Inventor project
IPR	InstallShield Project
IPS	Image Analyst MKII Pipeline
IPT	Inventor Part
IPUZ	ipuz puzzle open format
IPX	Ipix Spherical Panorama
IPYNB	IPython notebook
IQY	Microsoft Web query
IRCP	IRIDAS Composite playlist
IRP	InfraRecorder Project
IRR	Irrlicht 3D scene
IRRMESH	Irrlicht static Mesh
IS	Sound Invasion Music System module
IS20	Sound Invasion Music System 2.0 module
ISF	Inspiration Software data
ISM	ISAM table handler data
ISO	Apple ISO9660/HFS hybrid CD image
ISPRO	InstallSimple Project
ISS	Inno Setup Script
ISS/XARC	FunCom ISS audio
IST	Adobe Image Styler file
ISTG	Imagine Staging File
ISU	InstallShield Uninstall Script
ISZ	ISo Zipped format
ITA	IconTweaker theme
ITC	iTunes CoverFlow data
ITC2	iTunes Cover Flow Data (v2)
ITL	iTunes Music Library
ITM	Diablo 1 Item safe file format
ITMX	XMILE XML Model Interchange Language
ITR	Icy Tower Replay
ITW	BMW TIS grayscale bitmap
ITX	Imagine Texture
IUM	infoUSA Network Meter file
IV	SGI Open Inventor Scene Graph (ASCII)
IVE	OpenSceneGraph native binary format
IVF	Intel Indeo Video File
IVML	INDENICA Variability Modelling Language
IVR	RealNetworks Internet Video Recording
IVU	ImmerVision XML user interface
IVY	Ivy module descriptor
IW2	Information Workshop 2000 data file
IW5DLC	Call of Duty Modern Warfare 3 DLC
IWC	WaveL bitmap
IWD	Call Of Duty map - game data archive
IWI	Infinity Ward Image bitmap
IXL	DB/TextWorks Database Indexed List
IXS	Ixalance module
J	JAR Compressed Archive
JACKSUM	Jacksum fingerprints
JAD	Java Application Descriptor
JAM	JAM Archive
JAP	Nonogram puzzle
JAR	JARCS compressed archive
JAS	Cheetah3D format
JBA	Jabaco project
JBEAM	BeamNG vehicle definition format
JBF	PaintShop Pro Browser cache
JBG/JBIG/BIE	JBIG raster bitmap
JBI	Motoman Relative Job
JCE	JWPce document
JCEKS	Java SunJCE KeyStore
JCF	JTAG Chain File
JCI	JTAG Chain Information
JCLIC	JClic project
JCP	JCreator Project
JDF	Job Definition Format Job File
JDP	BlackBerry JDE Application Project
JDT	Capture Classic Filler - Accelio JetForm
JDX/DX	JCAMP-DX format
JED	CUPL format
JEF	Janome NH10000 Sewing Machine Stitch
JG6	BigJig Jigsaw
JGCSCS	EditPad Pro Custom Syntax Coloring Scheme (ASCII)
JHM	JavaHelp map
JIF	Jeff's Image Format bitmap
JIG	GameHouse Jigsaw Game
JKS/KEYSTORE	Java KeyStore
JLS	JPEG-LS bitmap
JMF	Janko Mrsic-Flogel module
JMX	Hot Potatoes JMix project
JNB	Sigma Plot Workbook
JNG	JPEG Network Graphics bitmap
JNILIB	JNI Library
JNLP	Java Web Start application descriptor
JNT	Windows Journal
JO	FlowJo Mac Workspace
JOB	Compass and Ruler Job
JOBOPTIONS	Acrobat Distiller Job Options
JP2	JPEG 2000 bitmap
JPC/J2C/J2K	JPEG-2000 Code Stream bitmap
JPF/JPX	JPEG 2000 eXtended bitmap
JPM	JPEG 2000 Multi-layer bitmap
JPO	Jason Page audio format (old)
JPS	JPEG Stereoscopic bitmap
JPX	JBuilder Project
JQZ	JQuiz quiz
JR2	Fishing Simulator 2 addon
JRC	JRchive compressed archive
JRPRINT	JasperReports Print
JRSR	JPC-RR rerecording
JRXML	JasperReports JRXML report definition
JSB	JavaScript Bean file
JSD	eFAX Jet Suite Document
JSF	Jahshaka Scene File
JSON	Coriolis.io ship loadout
JSONLZ4	Mozilla JSON compressed bookmark
JSPF	JSON Playlist File
JSPROJ	Visual Studio JavaScript Project
JSRC	Jabaco Source
JST	Jnes save state
JSXBIN	Binary ExtendScript Script
JT	JT 3D visualization format
JTD	Ichitaro document
JUCER	JUCE project
JUI	Qt Jambi User Interface
JVEROM	ParaJVE ROM
JVX	JavaView JVX geometry
JWC	JewelCase Maker project
JWL	Easy CD Creator's media label
JWR	LegaSuite GUI Runtime
JZLIB	Lemur Module
JZML	Lemur Layout
K64	Kernal64 save state
K7	DCMO5 emulator tape image
KA	Karma Asset
KAL	Hondata K-Manager Calibration data
KAP	MapInfo Sea Chart
KAR/MID	Karaoke MIDI
KAW	Karma Workspace
KBDX	3DS MAX keyboard shortcuts (XML)
KCH	KChess saved match
KCM	KonyvCalc file
KCX	Kea Coloring Book page
KD1	ProHance Mouse Keys Definition table
KDB/KDBX	KeePass Password Safe database
KDC	Kaspersky Anti-Virus signature bases
KDELNK	KDE desktop Link
KDH	KDH document
KDS	KD Player Skin
KDX	Google Earth import definition
KDZ	LG smartphone firmware archive
KES	Kurzweil 3000 document
KEXI	Kexi database
KEY	H-BEDV - AVIRA product key
KEYBOARD	SuperJAM! Keyboard
KEYSTORE	Gnome Keyring Store
KFA	Voxlap Frame Animation
KFG	Indiana Jones and the Infernal Machine keys configuration
KFM	Gamebyro KFM data
KFN	KaraFun Karaoke Song
KFR	Kalles Fraktaler parameters
KGB	KGB Archiver compressed archive
KI	Klystrack Instrument
KICAD_PCB	KiCad PCB
KID	Kidspiration file
KIF/KIFF	Kt Interchange File Format compressed bitmap
KIN	Kinemage protein language
KK3	Kaleidoscope Kreator 3 workspace
KLA	KLARFF map-data
KLC	Microsoft Keyboard Layout Creator source (UTF-16-BE)
KLIP	KlipFolio Klip
KLQ	Kaspersky Anti-Virus quarantined
KMAP	BeebEm Keymap
KML	Emu48 keyboard configuration
KMN	Keyman keyboard source
KMP	IBM i (Client) Access Keyboard Map
KMY	KMyMoney XML data (decompressed)
KMZ	Google Earth saved working session
KOA	Koala Paint (C64) bitmap
KODU	Kodu game world
KP	KeyKit Page
KPJ	Keyman Project
KPL	Kazaa Playlist
KPP	Kid Pix Presentation
KPR	KOffice KPresenter Presentation
KPX	Kid Pix project
KR1/KRZ	Kurzweil K2-serie sample
KRA	Krita document
KRC	Chinese KuGou ResourCe (KuGou Music lyric)
KSF	Korg Trinity/Triton sample
KSP	KeyShot Package
KSV	Kheops Studio Video
KSY	Kaitai Struct language
KT	Klystrack chiptune
KT3	Battery 3 Drum Kit
KTN	KToon project
KTS	KT-Tech compressed audio
KTZ	Kahootz Project
KV	Kv design language
KV6	Voxlap voxel sprite
KVA	KVIrc Addon
KVK	Keyman Virtual Keyboard
KVT	KVIrc Theme
KVTML	KWordQuiz learning file
KW3	KanjiWORD document
KWD	KWord document
KWO	KeyWallet Object - encrypted data
KWS	KeyWallet Skin
KX	KiXtart tokenized script
KXF	Koda Form Designer Form
KZ	Chinese kuaiya kzip compressed archive
L01	Encase Logical Evidence
L2R	Lineage II Replay
L30	Bitmapped Signum!2 printer font (Laser/Inkjet)
L64	64LAN container
L6T	Line 6 Tone
L86	CP/M-86 library
LA	La Lossless Audio compressed (generic)
LAB	Bar-One Lite label
LAN/GIS	ERDAS Image bitmap (v7.x)
LAS	CWLS Log ASCII Standard
LAUNCH	Eclipse Launch configuration
LAV	DNA Sequence Alignment
LAY	Sprint Layout Printed Circuit Design (v6.0)
LAYOUT	Code::Blocks Workspace Layout
LAZ	LASzip compressed LAS LiDAR data
LB	Low Bitrate Packer compressed audio
LB6/LBX	CODESYS Library
LBL	Planetary Data System info (v3)
LBS	Omnis Studio Library
LCD	Lucid 3-D spreadsheet (v2.x)
LD	Polycom SoundPoint IP firmware
LDF	LuraDocument Format bitmap
LDIF	LDAP Data Interchange Format
LDP	Altium Designer Layer Pairs export data
LDR	GoDot C64 Image Processing - Loader
LDW	Little Draw Drawing
LDX	Lingoes Dictionary
LEF	LEN Exchange Format
LEX	Polar SpellChecker dictionary
LFD	LucasFilm Data - LucasArts game resource
LFM	Lazarus Form
LFP	Lytro Light Field Picture web format
LG	ARHANGEL compressed archive
LG32	GFA-BASIC 32 library
LGO	Modern ListGeo Output
LGX	Logistix spreadsheet
LHA	Amiga WHDLoad package (lha compressed)
LIB	CIRCAD source library (v4.x)
LIB4D	Cinema 4D Preset Library
LIBR	Music-X patch Library
LIBRARY-MS	Microsoft Windows library description
LIBZIP	Camtasia Studio Zipped Library
LIC	ESET NOD32 Antivirus License data
LID	Lextek Language Identification Module
LIF	Life cellular automata format
LIFT	Lexicon Interchange FormaT
LIGHTHOUSE-PROJECT	Lighthouse Project
LIGT	Caligari TrueSpace Light (v2.x)
LIM	Limit compressed archive
LIN	X-Plane Painted Line
LIQ	Liquid Tracker module
LIST	JAR Index
LIT	Microsoft Reader eBook
LITEMOD	Minecraft LiteLoader Mod
LIVECODE	LiveCode stack
LKD	Pioneer OEL screensaver
LL	Combit List and Label printer setup file
LLSD	Linden Lab Structured Data
LMA	Learning Mobile Author (LMA) Project
LME	Leggless Music Editor module
LMF	Quartus Library Mapping File
LMK	Sothink Logo Maker logo
LMU	RPG Maker 2000/2003 Map
LMX	Route 66 Landmarks
LNG	SourceEdit Language Definition
LNK	Windows Shortcut
LNX	Atari Lynx ROM
LOADTEST	Visual Studio LoadTest project
LOC	Topografix's EasyGPS/TerraByte Location file
LOG	Cabrillo Log (v2.0)
LOG/LOG1/LOG2	Windows NT Registry Hive (transaction 1)
LOGICX	Logic Pro X project
LOGONVISTA	LogonStudio Vista logon image
LOGONXP	LogonStudio theme
LOOK	SpeedGrade Look
LP	LaTeX-CAD drawing
LPAQ	lpaq compressed data (generic)
LPD	Lecturnity Player file
LPI	Lazarus Project Information
LPK	Lazarus Package
LPMD	LPMD Molecular Data
LPS	Lazarus Project Session
LPU	Passolo Localization Project
LQM/JLQM	LG QuickMemo note
LQT	Liquid Audio
LRC	Lyric file (with ID tags)
LRF	Unencrypted BBeB - BroadBand eBook
LRPREV	Lightroom preview data
LRTEMPLATE	Adobe Photoshop Lightroom Template
LS3PROJ	Visual Studio LightSwitch (V3) Project
LSA	Domino Designer Agent
LSC	LOGO!Soft Comfort Circuit
LSD	ABBYY Lingvo dictionary
LSIM	LogicSim circuit (Java ver.)
LSL	SuperMap World GIS Line Style Library
LSM	Linux Software Map entry (gen)
LSMV	Lsnes movie capture
LSPROJ	Visual Studio LightSwitch Project
LSS/16	LSS16 SYSLINUX Splash image
LST	CUPL error Listing
LSXPROJ	Visual Studio LightSwitch Project
LSXTPROJ	Visual Studio LightSwitch project
LSZ	Litestep theme
LTF	Frogans Short-cut
LTN	LinkTreeNote document
LUACODEC	Reason Remote Lua Codec
LVA	Logitech Video Effects Avatar
LVF	Lightweight Video Format video
LVLX	PGE Extendable Level
LVM	LabVIEW Measurement
LVW	Livewire Document
LW	LiteWave compressed audio
LWF	LuraWave Format bitmap
LWO/LW	LightWave 3D Object
LWS	LightWave 3D Scene
LWTP	LimeWire theme
LXF	LEGO Exchange Format - Digital Designer
LXFML	LEGO Digital Designer XML data
LXO	Luxology 3D scene
LXXPLOT	LXBeams Light Plot
LY/ILY	LilyPond music score
LYR	Project Dogwaffle layered bitmap
LYT	PCB Layout
LYX	LyX document
LZ	LZIP compressed archive
LZC	Need for Speed game data
LZH/LHA	LHARC/LZARK compressed archive (generic)
LZMA	LZMA compressed archive
LZO	lzop compressed
LZS	LArc compressed archive
LZT	LzTurbo compressed
LZX	LZX Amiga compressed archive
M	Maple Common Binary file (generic)
M01/P01/R01/S01	MicroStation Modification resource file
M15	thinEdge model
M2	Mesa 2 spreadsheet
M2I	MMC2IEC mapping/container format
M2S	Maxthon skin (MX2)
M2TS/MTS	MPEG-2 Transport Stream video
M3G	Mobile 3D Graphics
M3U	Extended M3U playlist
M3U8/M3U	Extended M3U playlist (UTF-8)
M4	m4 preprocessor / macro source
M4A	Apple Lossless Audio Codec
M4A/MP4	AAC Audio in MP4 container
M4B	iTunes Audio Book
M4P	Protected iTunes Music Store audio track
M4V	iTunes Apple TV Video
M5P	Motus MachFive Preset
M8M	8mam8 model
M99	M99 compressed data
MA	Maya ASCII Scene
MAB	Mozilla Address Book
MAC	MegaCAD Macro
MAE	Maestro molecular model
MAF	Multiple Alignment Format
MAFF	Mozilla Archive Format (gen)
MAFF/ZIP	Mozilla Archive Format (Firefox)
MAG	MAG v2 bitmap
MAKI	Compiled Winamp Maki script
MAL	MadAppLauncher configuration
MAN	Man page
MANI	Mine-imator Project
MANIFEST	Windows Manifest - Visual Stylesheet XML file
MAP	3by5 Index
MAP/CSF	PCRaster map
MAR	MAr compressed archive
MASSEFFECTSAVE	Mass Effect save game
MAT	3D Studio Max Material Library
MATERIAL	OGRE Material
MATHML	Mathematical Markup Language
MAUD/IFF	IFF MacroSystem Audio
MAX	3D Studio Max Scene
MAXC	MaxCrypt encrypted
MAXPAT	Max Patch
MAZ	Hover! maze data
MB	Maya Binary Scene (32bit)
MB1/MBD	BS-DOS MB1 disk image
MB2/MBD	BS-DOS MB2 disk image
MBC	ModBus Configuration
MBD	Multimedia Builder Data
MBF	Microsoft Money Backup file
MBI	MBasic source
MBM	EPOC/Symbian MultiBitMap
MBOX	Standard Unix Mailbox
MBP	Mobipocket eBook Auxiliary data
MBPV2	Amazon Kindle ebook metadata
MBSA	Microsoft Baseline Security Analyser report
MBX	MapInfo MapBasic application eXtension (generic)
MBZ	Moodle Backup
MC	Macrocell format
MC4D/C4D	Maxon Cinema 4D v4.x object
MC9	Mastercam 9 geometry
MCADDON	Minecraft Add-on
MCD	Mathcad document
MCD/MCR	Playstation Memory Card savestate
MCDX	Mathcad Prime Document
MCL	MCell Cellular Automata format
MCLIB	MaxonCAD Library
MCMD	MCMD module
MCML	Media Center Markup Language
MCO	MSN Messenger Wink
MCP	CodeWarrior Project (Big Endian)
MCPACK	Minecraft resources Package
MCR	Compass and Ruler Macro
MCW	MPLAB IDE Workspace
MCW/DOC	Word for the Macintosh/Write for Atari ST document (v1.0)
MCWORLD	Minecraft World
MD	MDCD compressed archive
MD2	Quake 2 model
MD3	Quake III Arena model
MD5ANIM	Doom 3 MD5 Animation
MD5MESH	Doom 3 MD5 Mesh
MD8	Mediator Project
MDA	MicroDesign Area bitmap (AREA2)
MDAT	The Final Musicsystem eXtended module (pattern)
MDB	Microsoft Jet DB
MDC	Merkaartor Document
MDD	MDict resource
MDF	Microsoft SQL Server database (generic)
MDI	Microsoft Document Imaging format
MDJ	StarUML Model
MDL	CA-Compete! Model (v4.0)
MDR	MagicDraw UML project
MDS	Media Descriptor
MDSX	MonoDevelop Solution
MDU	D-Flow FM Model Data
MDV	QLAY MDV image
MDW	Microsoft Jet DB Workgroup Information
MDXML	Magic Draw UML model
ME	TROFF markup
ME/MEW	Multi Edit configuration
ME1	MagicEngine savestate
ME3	Arcsoft MultiMedia Email 3.0 message
MEB	Open eBook
MED	Music Editor module
MED/MMD0/MMD1/MMD2/MMD3/MMDC	MED/OctaMED Amiga module
MEG	MEGA data format
MEI	Music Encoding Initiative format
MELLEL/MELL	Mellel document
MEM	Mnemosyne database
MER	Entity-Relationship (ER) Diagram
MERLIN2	Merlin Project
MET	HEC-HMS Metereologic model configuration
META	Unity asset Meta data
METALINK	Metalink file
MEX	Macro Express Macro
MEXW32	MATLAB Windows 32bit compiled function
MEXW64	MATLAB Windows 64bit compiled function
MF	Java Manifest
MFA	MultiMedia Fusion 2 Application
MFCRIBBON-MS	MFC Ribbon definition
MFIL	Blzzard Manifest
MFL	Mozilla XUL FastLoad File
MFT	Battlefield Bad Company package manifest
MG1/MG2/MG4/MG8	MultiArtist bitmap
MGB	Paragon 5 Gameboy Tracker module
MGF	L3DT Map Group File
MGOURMET3	MacGourmet 3 document
MGR	MGR bitmap (modern, 8bit aligned)
MGS	MSX Gigamix MGSDRV3 music
MGT	Megatracker module
MHD	MetaImage MetaHeader
MHT	MIME HTML archive format
MHT/MHTML	MIME HTML archive format (var 2)
MID	MIDI Music
MIDNAM	MIDI patch name
MIF	Maker Interchange Format
MIF/MIFF	ImageMagick Machine independent File Format bitmap
MIG	Mighty Draw drawing
MINI2SF	2SF Nintendo DS Sound Format rip (Mini)
MINIBANK	Mini V preset
MININCSF	NCSF Nitro Composer Sound Format rip (Mini)
MINIPSF	PSF1 Playstation Sound Format rip (Mini)
MINIPSF2	PSF2 Playstation 2 Sound Format rip (Mini)
MINIQSF	QSF Capcom QSound Format rip (Mini)
MINISNSF	SNSF Super Nintendo Sound Format rip (mini)
MINISSF	SSF Saturn Sound Format rip (mini)
MINIUSF	USF Ultra64 Sound Format rip (mini)
MIO	MIO compressed audio
MIS	McGrath Information Solution metadata
MITSU	Mitsubishi S340-10 bitmap
MIX	Atari Digi-Mix module
MIZ	DCS Mission
MJ2/MJP2	Motion JPEG 2000 video
MJP	J.River Media Center plugin
MK2/MKII	Mark II Sound-System module
MKA	Matroska Audio stream
MKD	CAD6 Drawing
MKF	KaraBox Karaoke song
MKL	CAD6 Library
MKV	Matroska Video stream
MKW	mkwACT lossless compressed audio
ML	Musicline module
MLAPPINSTALL	MATLAB app installer
MLB	MyLittleBase database
MLL	Maya plug-in (generic)
MLM	MolMeccano molecule
MLP	Meridian Lossless Packing audio
MLPKGINSTALL	MATLAB support package
MLR	MK Jogo Replay
MLS	Skype localization data
MLV	Magic Lantern raw Video format v2.0
MLX	MeshLab filter script
MM	FreeMind mind map
MM8	MusicMaker v8 module
MMAP	MindManager Brainstorm and Process Control Map
MMD	Cumulate Draw's editable MMD format
MMDB	GeoLite2 IP geolocation database
MMF	MathMagic equation File
MML	Aleph One Marathon Markup Language
MMM	Adobe Type Manager Multiple Master Metrics
MMMS	MetaMind Machine Sequence
MMO	Hyper File memo
MMP	LMMS Project
MMPZ	LMMS Project Zipped
MMW	AceMoney data
MMZ	MiraMon compressed data
MN	MuPAD Notebook
MNC	MINC1 Medical Imaging format
MND	Fractal Forge 2.x fractal parameters
MNG	Multiple-image Network Graphics bitmap/anim
MNU/IN1/MB0/MB1/PB0/PB1	UltraEdit Menu
MO3	MO3 module
MOBI/PRC	Mobipocket - PRC Palm e-Book
MOD	Digital Tracker 4-channel module
MOD/TEXT/TOOL	Oberon System 3 text document
MODD	Picture Motion Browser data
MODE1V3	Xcode project data
MODE2V3	Xcode project data
MODEL	CATIA model
MODFEM	Femap Model
MOFLEX	Mobiclip for Nintendo CTR
MOGG	Rock Band multi track music
MOGRT	Adobe Motion Graphics Template
MOL2	Tripos Mol2
MOLDEN	Molden Format
MON	M.O.N New module
MOP	MOP report
MOS	Infinity Engine compressed graphic (v1)
MOTIF	MacStitch/WinStitch Motif
MOU	WinMount archive
MOV	Knowledge Adventure MoVie video
MOV/QT	QuickTime Movie
MP2S	Max Payne 2 saved game
MP4	ISO base media container
MP4/STEM	Native Instruments Stems audio
MPB	MyPhoneExplorer Backup
MPC	Electronic Arts MPC video
MPCPL	MediaPlayer Classic Playlist
MPD	DASH Media Presentation Description
MPEX/TXT	Mass Properties Exchange data
MPF	MainActor project
MPG	MPEG2 Video File recorded by ProgDVB
MPG/MPEG	MPEG video
MPHBIN	COMSOL Multiphysics mesh (bin)
MPHTXT	COMSOL Multiphysics mesh (txt)
MPI	InstallJammer Project
MPK	Project64 Memory Pack
MPL	AVCHD Playlist
MPO	Multi-Picture Object bitmap
MPP	Microsoft Project
MPPZ	MagicPlot Project
MPS	Garmin MapSource data
MPW	WordPerfect Executive Spreadsheet
MPX	Microsoft Project exported data
MQ4	MetaQuote / MetaTrader indicator
MQL	MetaTrader indicator
MQO	Metasequoia 3D scene
MQV	Sony / Mobile Quicktime Video
MRB	Multiple Resolution Bitmap
MRF	Meta Raster Format XML metadata
MRP	China Mobile application
MRT	Stimulsoft Reports report
MRW	Minolta Dimage RAW image
MRX	DCMOTO save state
MS1	VirtualBus Map
MS3D	MilkShape 3D model
MS8/MS9/MS10	MultiSim Design (generic)
MSA	Atari MSA Disk Image
MSC	Microsoft Management Console Snap-in control file
MSCX	MuseScore music score
MSCZ	MuseScore compressed music score
MSDVD	Windows DVD Maker project
MSE-INSTALLER	Magic Set Editor Installer
MSE-SET	Magic Set Editor Set
MSF	Mozilla Mail Summary file
MSH	Fluent mesh
MSI	Microsoft Windows Installer
MSKIN	Maxthon skin (MX1)
MSL	Mapping Specification Language (ASCII)
MSM	Windows Installer Merge Module
MSO	ActiveMime object
MSQ	Mario Sequencer song
MSRCINCIDENT	Remote Assistance Request
MSS	Advanced Mario Sequencer Song
MSG	Mail Message
MST	Room Arranger design
MSU	Windows Update Package
MSWMM	Windows Movie Maker project
MT2	MadTracker 2 module
MT5	Poser Material (V5)
MTC	MTC chiptune
MTE	TargetExpress target
MTF	Mediatek Font
MTL	Alias\|Wavefront material
MTM	MultiTracker module
MTP	EasyBuilder8000 project
MTS	AVCHD video clips - MPEG Transport Stream
MTV	MTV video
MTW	Minitab Worksheet
MTX	Matrix spreadsheet
MTZ	MIUI Theme
MUG	Digital Mugician 2 module
MULIB	Muse Library
MULTISAMPLE	Bitwig Studio multisample
MUM	Windows Update Package
MUP	MindMup Mindmap
MUS	Doom/Heretic music
MUS/ETF	Finale ETF Enigma Tansportable File
MUS/MYR	Myriad Harmony / Melody assistant music
MUSE	Emacs Muse project
MUSIC	SuperTux Music
MUSINK	Musink music score
MUX	MUX video
MV	Miva Script
MV/MOVIE	SGI movie format
MV3	AUPEC encoded audio
MVA	Setup Program Archive
MVB	Multimedia Viewer Book
MVC	Collectorz.com Movie Collector data
MVDX	MindView Windows Document
MVE	Interplay MVE video
MVEX	Muvee autoProducer 6 project
MVG	Magick Vector Graphics
MVM	MVX Module
MVPL	Microsoft Visual Programming Language project
MVS	MusicMatch JukeBox Visualization (v1.0)
MW	Maple XML Worksheet
MW2	MicroWorlds LOGO Activity
MW4	MechWarrior 4 game data
MWB	MySQL Workbench model archive
MWD	Mariner Write Document
MWDECK	Magic Workstation Deck
MWM	Space Engineers Model
MWP	STEP7-Micro WIN PLC Program
MWS	Maple worksheet
MWZ	Maple compressed Worksheet
MXD	ArcMap GIS project
MXF	Material Exchange Format
MXMF/XMF	eXtensible Music File Format
MXP	Macromedia Extension Package
MXR	MatrixREDUCE 2.0 PSAM XML format
MXS	Maxwell Render Scene
MXTX	MaxTrax module
MYAPP	VisualStudio MyApp
MYI	MySQL MyISAM tables index
MYO	MYOB data
MYS	Mystic BBS install package
MZ	MOZART Music Document
MZF	MediaZip compressed archive
MZML	MzML
MZP	MOZART Percussion map
MZTAB	mzTab format
MZX	MegaZeux game
MZXML	mzXML format
N2P/N2V	Nebula Program / Vector
N3M	Nokia 3D Map
NAB	Novell Groupwise Address Book
NAP	NAPLPS graphics
NAS	Nastran input data
NATVIS	Visual Studio Natvis visualization
NB	Mathematica Notebook (headerless)
NB/NBP	Mathematica Notebook
NBF	NVIDIA Scene Graph binary
NBI	Ahead Nero BackItUp file (v1.x)
NBKT	Native Instruments BATTERY kit
NBM	NetBeans Module
NBU	Nokia phone BackUp
NBZ	C64 NBZ disk image
NC	mcrypt encrypted
NCB	Microsoft C/C++ program database
NCC	NI Controller Configuration
NCD	Nero CoverDesigner
NCER	Nintendo Cell Resource
NCM	NI MASCHINE template
NCM2	NI MASCHINE MK2 template
NCMM	NI MASCHINE MIKRO template
NCMM2	NI MASCHINE MIKRO MK2 template
NCP	Nikon Custom Picture Control
NCS	KOTOR (Knight Of The Old Republic) compiled script
NCSFLIB	NCSF Nitro Composer Sound Format rip
NCT	Ahead Nero CoverDesigner Template
NCX	Navigation Control file for XML
NDB	SeeYou Waypoint
NDF	Channel Data File
NDM	Enemy Territory: Quake Wars demo
NDPA	NanoZoomer Annotation
NDPI	Hamamatsu NanoZoomer Digital Pathology Image
NDX	WinDev Index
NED	Nerdtracker II module
NEF	Nikon raw image
NEO	Atari NeoChrome bitmap
NEPPRJ	NEPLAN Project
NES	Nintendo Entertainment System ROM
NET	Epanet data file
NEU	Gambit Neutral file
NEX/NXS	NEXUS format
NEXE	Google NaCl Executable (x86)
NF	Faase Paint-by-Numbers puzzle format
NFC	Nokia PC Suite Content Copier file
NFF	Haines NFF scene
NFG	Gambit strategic N-player Game File Format
NFM8	Native Instruments FM8 patch
NFO	Folio Views Infobase
NFZ	JB BAHN vehicle
NG	Norton Guide
N-GAGE	N-Gage 2.0 on-device installation
NGB	NonoPocket nonogram
NGC/NGD/NGM	Xilinx Netlist
NGC/NGP/NPC	NeoGeo game cartridge (var 1)
NGG	Nokia Group Graphics bitmap
NGRR	Native Instruments Guitar Rig 5 preset
NGS	NGPocket savestate
NIB	Apple Interface Builder NIB archive (XML)
NIC	NeoDesk icon (compressed)
NII	NIfTI-1 data format (big endian)
NITF/NTF	NITF National Imagery Transmission Format image (generic)
NJA	Seifert ASCII pole figure format
NK	Nuke script
NK2	Outlook Nickfile
NKPLE	Nuke script (encrypted)
NKTRL_SET	KORG Kontrol Editor Settings
NKTRL2_DATA	KORG nanoKONTROL2 Editor data
NL2PARK	NoLimits 2 Park
NL2PKG	NoLimits 2 Package
NLM	Netware Loadable Module
NLTRACK	NoLimits Track
NM2	Navitel 3.1 Map
NMEA/NMA	NMEA GPS log data
NMF	Nikon Movie File
NML	Traktor collection
NMSV	Native Instruments Massive Sound
NMV	Nintendulator movie capture
NNB	LigPlot Non-Bonded contacts data
NOA	Nancy Codec video
NOL	Nokia Operator Logo bitmap
NOTEBOOK	SMART Notebook
NOV	Battery 3 quick load sample data
NPK	MikroTik RouterOS Upgrade Package
NPL	Xilinx Integrated Software Environment Project
NPM	Corel Custom Natural Media Stroke
NPP	Art Explosion Publisher Pro document
NPS	Natron Node Preset
NPW	nPassword DataBank (w/o password)
NPY	NumPy data
NQI	ESET Smart Security Quarantined file Information
NR3	Nero MP3 ISO Compilation
NRA	Nero Audio-CD Compilation
NRG	Nero BurningROM CDImage
NRI	Nero ISO Compilation
NRKT	Native Instruments Reaktor sample
NRRD	Nearly Raw Raster Data
NRV	Nero Video-CD compilation
NS1	NetStumbler NS1 log
NS2P	Nord Stage 2 Program
NS2PB	Nord Stage 2 Program Bundle
NSF	Lotus Notes database
NSFE	Extended Nintendo Sound Format chiptune
NSI	NSIS script (with rem)
NSL	Nokia Startup Logo Editor bitmap
NSLA	Nero Scalable Audio
NSMP	Nord User Sample
NSP	Computerized Speech Lab NSP audio
NSPG	Nord Stage Classic/EX Program
NST	Nestopia savestate
NSV	Nullsoft Streaming Video
NSX	Index Apollo Database Engine
NT	Startrekker 1.x module info
NT3	JB BAHN layout
NTF	Font descriptor
NTH	Nokia theme
NTM	Navitel 2.0 Map
NTP	NovoTrade Packer module
NTT	Neato MediaFACE label template
NTW	Lode Data Network
NUMBERS	Numbers spreadsheet
NUNIT	NUnit project
NUP	NOD32 Antivirus Update file
NUPKG	NuGet Package
NUSPEC	NuGet Specification
NUT/SAN	Smush Animation format (old)
NUV	NuppelVideo (MythTV) video
NV	Juno address book
NVB	NVIDIA Scene
NVDL	NVDL script
NVF	Creative Nomad II series MP3 players Voice File audio
NVRAM	VMware BIOS state
NWC	NoteWorthy Composer song
NWD	NavisWorks Document
NWP	Neo Content file
NX1	NexusDB database
NXV	NXV video
NY	Audacity Nyquits plug-in
NYF	myBase database
NZ	NanoZip compressed archive
NZB	Newzbin Usenet Index
O	ELF Executable and Linkable format (generic)
O/OBJ	Intel 80386 Common Object File Format (COFF) object
O2C	Objects to See 3D object
OAD	Notaro document
OB3	ORTIM Zeit data
OBD	Office Binder Document
OBJ	Blender 3D object
OBJ/A	Common Object File Format (COFF) Library
OBML	Opera Binary Markup Language
OBML16	Opera Mini saved page
OBO	PSI MI format
OBP	Bryce Object Presets
OBPACK	ObjectBar theme
OBSP	Oberheim SEM V preset
OCC	DB/TextWorks Database Terms and Words
OCD	OCAD map
OCF	Oberon/F Code File
OCI	OpenCanvas Image
OCT	Radiance Octree
OCX	Windows ActiveX control
ODB	OpenDocument DataBase (generic)
ODC	Oberon/F Document
ODCL	Open Dialog Control Language for AutoCAD
ODEX	Optimized Dalvik Executable
ODF	OpenDocument Formula
ODG	OpenDocument Graphics document
ODM	OpenDocument Master Text document
ODP	OpenDocument Presentation
ODS	OpenDocument Spreadsheet document
ODT	MindRender VREK Object File Format
ODTTF	Obfuscated subsetted Font
ODV	Ocean Data View data (TXT)
OEMODEL	Seene 3d model (v2)
OFC	Open Financial Connectivity
OFF	OFF geometry definition
OFM	OmniForm Form
OFNT	IFF Outline Font
OFP	Origin Function Plot
OFR/OFS	OptimFROG encoded audio
OFT	Outlook Form Template
OFW	TopLevel Forms Form
OGG	OGG Vorbis audio
OGM	OGG Media stream
OGP	PlayStation RSD Object Group (gen)
OGV	Ogg Vorbis Video
OGV/OGG	Ogg Theora video
OHT	Oracle Help for Java mapping
OIV	OpenIV mod package
OKT/OKTA	Oktalyzer module
OLB	OrCAD PSpice Capture Symbols Models
OLEO	Oleo spreadsheet
OLRW/OLR	Openlab Raw Format
OMA	Sony OpenMG Audio (SonicStage)
OMF	Onyx Music File module
OMF/OMFI	Open Media Framework Interchange
OMOD	OpenMRS Module
OMP	OpenMusic Patch
OMR	openMSX replay (ungzipped)
OMX	OMAX Make tool path data
ONB	OpenModelica NoteBook
OND	Lotus Notes Encapsulated Memo
ONE	Microsoft OneNote note
ONEPKG	Microsoft OneNote Package
ONETOC2	OneNote table of contents
OOM	PowerDesigner Model
OOP	OOP compressed archive
OPA/OPO/APP	Psion Object/OPL Output
OPAM	OPAM package info
OPC	Office Upgrade Control file
OPD	Durango Interferometry data
OPF	Obsidium Project File
OPJ	OrCAD Project
OPK	Origin Pack file
OPL/OPH/OXH	EPOC OPL source
OPML/XML	Outline Processor Markup Language
OPO	EPOC OPL Object module
OPPC/OPPS3	Darksiders game data package
OPS	Office Profile-Settings (v1.1)
OPUS	Opus compressed audio
OPX	EPOC OPL eXtension
OPY	OptiY Model
ORA	OpenRaster bitmap
ORC	Csound Orchestra
ORF	Olympus digital camera RAW image (IIRO)
ORG	Creative Music System Intelligent Organ music
OSF	Oberon/F Symbol File
OSG	Open Scenegraph scene
OSM	OpenStreetMap XML Data
OSP	OpenShot Project
OSQ	Original Sound Quality audio
OST	Outlook Exchange Offline Storage
OSU	Osu! script
OTF	OpenType Font
OTP	OpenDocument Presentation Template
OTRKEY	OnlineTVRecorder (OTR) Keyfile
OTS	OpenDocument Spreadsheet template
OTT	OpenDocument Text Document template
OTZ	OpenLP Theme
OUT	Lua 4.0 bytecode
OUT/TXT	Wireshark traffic log
OUTJOB	Altium Designer Output Job
OVA	Open Virtualization Format package
OVD	ObjectVision Datafile
OVE	Cakewalk Overture Score
OVF	OOMMF Vector Field 1.0 format
OVL	C-Worthy Machine Dependant Overlay (v1.x)
OVPN	OpenVPN profile (var.1)
OVR	Borland Overlay
OVX	Psion OVAL Control
OXP	OmniRush eXtended Package
OXPS/XPS	Open XML Paper Specification
OXT	OpenOffice Extension
OXYGENE	Oxygene Project
OZF	Mozart functor
OZF2	OziExplorer Map
OZV	ORTIM Zeit project
P	MATLAB p-code
P00/S00/R00/U00	PC64 flexible container format
P24	Bitmapped Signum!2 printer font (24 Pins)
P2F	Eclipse Plugin list
P2G	Power2Go project
P2I	Power2Go Image
P3T	PlayStation 3 Theme
P40	The Player 4.0a module
P41	The Player 4.1a module
P4X	The Player 4.x Music
P5D	Planner 5D Project
P5M	Image Packaging System Manifest
P5P	Solaris Image Packaging System
P60	The Player 6.0a module
P65	Adobe PageMaker document (v6.5)
P7	Xv's Visual Schnauzer bitmap
P7S	PKCS #7 Signature
P8	PICO-8 cartridge
P9	Bitmapped Signum!2 printer font (9 Pins)
PA	PrintArtist project
PACK	Git pack format
PACKAGE	Maxis package/archive
PAD	Boeing Calc WorkPad (v3.x)
PAE	PowerArchiver Rijndael Encrypted file
PAG	RealTick page
PAGES	Pages document
PAK/ARC	PAK/ARC Compressed archive
PAL	DIV Games Studio Palette
PAL/PSPPALETTE	JASC format Palette
PAM	Portable Arbitrary Map bitmap
PAN	Panorama database
PANDO	Pando Package
PAP	Fractal Design Painter Paper texture
PAQ8F	PAQ8F compressed archive
PAQ8JC	PAQ8JC compressed archive
PAQ8O	PAQ8O compressed archive
PAR	Aerofly model parameters
PAR2	Parity Archive Volume Set (Par2)
PAT	Adobe Photoshop Pattern
PATCH	RCS/CVS diff output
PAX	PAX password protected bitmap
PBC	Parrot ByteCode
PBD	PowerBASIC debugger symbols
PBF	Paragon Backup Format image
PBI	PC-BSD Installer Package
PBIX	Power BI report
PBJ	Pixel Bender bytecode
PBK	Microsoft PhoneBook
PBLIB/SLL	PowerBASIC Static Link Library
PBN	Portable Bridge Notation (gen)
PBP	Phoenix Visual Designer project
PBR	PowerBASIC resource
PBT	PocketBook Theme
PBTX	PowerBuilder .NET Target
PBU	PowerBASIC/DOS Compiled Unit
PBW	Pebble Watchface
PBXPROJ	Apple Project Builder Xcode Project
PBXUSER	Apple Xcode User data
PBZ	Pebble firmware
PC1	DEGAS low-res compressed bitmap
PC3	AutoCAD Plotter Configuration
PCB	ACCEL Printed Circuit Board (ASCII)
PCBDOC	Altium Designer PCB Document
PCBLIB	Protel PCB 3.0 Binary Library
PCD	Kodak PhotoCD bitmap
PCF	Cisco VPN Profile Configuration File
PCG	Korg Trinity/Triton instruments bank (generic)
PCH	IFF binary Patch
PCH2	Nord Modular G2 Patch
PCL	Pencil project
PCL/PRN	HP Printer Command Language (ESC+E)
PCM/PCS	Pfaff Compatible design card
PCO	PC-Outline outline
PCP	AutoCAD Plotter Configuration
PCS	Microsoft PowerPoint Picture Storage
PCSAV	Mass Effect 2 save game
PCT/PICT/PIC	QuickDraw/PICT bitmap (v1)
PCU	XProfan Compiled Unit
PCV	MozBackup backup file
PD	PipeDream document
PD3	Denso BHT PD3 Image File / Program
PDB	BGBlitz position database
PDC	Pebble Draw Command image
PDD	PhotoDeluxe image
PDE	Prescription Drug Event format
PDF	Adobe Portable Document Format
PDFXML	Adobe PDFXML document
PDG	Chaoxing SSReader Digital Library e-Book
PDM	PowerDesigner Model
PDM/ACC	DeskMate Program/Accessory executable (v3.x)
PDN	Paint.NET Image (v3)
PDO	Pepakura Designer work
PDS	PALASM Design Description
PDSPRJ	Proteus Project
PDT	PDT structure definition
PDU	Protocol Data Unit message data
PDX	Adobe Portable Document Catalog Index 2.0
PE	PETSCII Editor screen
PE4	Ulead thumbnail
PEC	Brother/Babylock/Bernina Home Embroidery format
PECOM	Pecom 64 program
PEF	Pentax raw image
PEG	Peggle replay
PEGN	Peggle Nights replay
PEK	Adobe Premiere Peak Waveform
PERLAPP	PerlApp settings
PERSPECTIVE	Xcode perspective
PERSPECTIVEV3	Xcode perspective (V3)
PES	Brother/Babylock/Bernina Home Embroidery Format
PEZ	Prezi Desktop presentation
PF	Microsoft Windows 8 Prefetch data
PF2	GRUB2 font
PFA	Postscript Type 1 Font
PFB	Adobe PostScript Type 1 Font
PFD	Playstation 3 savegame control data
PFF	Formatta Portable Form File
PFG	jEEPers Program Configuration file (with rem)
PFL	PhotoFilter plugin
PFM	Adobe Printer Font Metrics
PFT	ChiWriter Printer Font
PFV	PhotoFiltre path
PGC	PGN (Portable Gaming Notation) Compressed format
PGM	Opentech Digital STB main software
PGML	Precision Graphics Markup Language
PGMX	ProbModelXML model
PGN	Portable Gaming Notation
PGO	Papagayo lipsync info
PGS	PageStream document
PGX	PGX JPEG 2000 bitmap
PHB	CMN Phonebook
PHC	Home Embroidery Format
PHF	Photo Font
PHJ	PhCNC project
PHN	Phun scene
PHO	Gerber Photoplot
PHP	PHP source
PHPPROJ	Visual Studio PHP Project
PHPRJ	RadPHP Project
PHR	iGO Phoneme data
PHX	Advanced Gravis Phoenix configuration
PI	Pi bitmap
PIB	PIM Backup
PIC	Bio-Rad Image(s) bitmap
PIC/CLP	PC Paint/Pictor bitmap
PICT	Macintosh Quickdraw/PICT Drawing
PIF	Program Information File (Windows)
PIGM	Packaged Indigo Renderer Material
PIKA	Pika Software Builder Project
PIM	PIM compressed archive
PIS	Beni Tracker module
PISKEL	Piskel sprite
PIT	Odin Partition Information Table
PIXEXP	PIX Experiment
PIXICODE	Pixilang compiled byte-code
PJG	packJPG compressed JPEG bitmap
PJM	PSXjin movie capture
PK3	Quake 3 game data
PKE/PKN	Extron IP Link driver
PKG	BeOS installation package
PKINFO	ArcGIS Package Info
PKM	GrafX2 bitmap
PKPASS	iOS Passbook Pass
PKPROJ	Visual CCScript Project
PKR	Pretty Good Privacy (PGP) Public Keyring
PL	PROGRESS Procedure Library (v11)
PLAN	Chief Architect plan
PLANNER	Planner project
PLAYER	2D Fighter Maker 2nd player data
PLB	PhotoLine browse index
PLBM	IFF Planar Bitmap
PLD	CUPL PLD Program format
PLE	Messenger Plus! Encrypted chat log
PLG	Aston Shell plugin
PLIST	XML Property List
PLM	Disorder Tracker 2 module
PLN	Microsoft Flight Simulator Flight Plan
PLP	Messenger Plus! Sound Pack
PLS	PenCell Spreadsheet
PLSC	Messenger Script Pack
PLSK	Messenger Plus! Skin Pack
PLT	Gerber Scientific plot
PM0	DeLorme map data
PM3	Crouzet Logic Software M3 project
PM4	Aldus PageMaker document (v4)
PM5	Aldus PageMaker document (v5)
PM6	Adobe PageMaker document (v6)
PMA	PMarc compressed archive
PMB	Print Magic Banner
PMC	Print Magic Card
PMD	PMDraw drawing/presentation
PME	Pixela Digital Picture
PMF	Print Magic Font
PMG	Photomerge Composition
PML	Palm Markup Language
PMP	AutoCAD Plotter-Modell Parameter
PMR	PhotoModeler project
PMS	AliceSoft PMS bitmap
PN	PokeyNoise chiptune
PNA	TomTom PNA map info
PNACH	PCSX2 Patch
PNC	Panasonic Network Camera compressed images
PNF	Windows precompiled INF
PNML	Workflow Petri Net Designer project
PNPROJ	Programmer's Notepad Project
PNPS	Programmer's Notepad State
PNT	DeskMate Paint image
POD	Plain Old Documentation format
PODSPEC	Pod Specification
POF	Programming Object File
POL	InnovMetric Software Polygon Model
POLY	Caligari TrueSpace Polyline (v2.x)
POM	Maven Project Object Model
PONT	Protege classes
POR	SPSS Portable ASCII Data
POSTBUILD	Xenocode Postbuild settings
POT	Fractint Continuous Potential Image
POV-STATE	Persistence of Vision state
PP1/PP2/PP3	Picture Packer bitmap
PP2	Ping Plotter Sample file
PP3	RawTherapee Postprocessing Profile
PPAM	PowerPoint Macro-enabled Open XML add-in
PPD	PostScript Printer Description
PPENC	Ashampoo Magical Security encrypted
PPF	Micrografx Picture Publisher document
PPG	Programmer's Notepad Project Group
PPJ	Premiere project
PPK	PuTTY Private Key
PPM	Portable PixMap bitmap (ASCII)
PPN	packPNM compressed BMP bitmap
PPP	CyberLink PowerProducer Project
PPR	Photodex ProShow Workspace
PPRJ	Protege Project
PPS/PPT	Microsoft PowerPoint document
PPT	Microsoft PowerPoint (v2.0)
PPTM	PowerPoint Microsoft Office Open XML Format document (with Macro)
PPTX	PowerPoint Microsoft Office Open XML Format document
PPV	Pocket PowerPoint
PPX	PingPlotter script
PPZ	PowerPoint Presentation
PQF	Corel Presentations file
PR	Javelin Printer driver
PR0	DCS device Profile
PR2	Aldus Persuasion Presentation (v2)
PR4	Harvard Graphics Presentation
PRC	PMD 85 emulator recording
PRD	Microsoft Printer Definition
PREFS	Amiga Preferences
PREXPORT	Premiere Export preset
PRF2	Nord Modular G2 Performance
PRFPSET	Adobe Premiere Effect Preset
PRJ	3D Project file (generic)
PRJPCB	Altium Designer project
PRM	The Print Shop Deluxe graphic
PRO	APE ProSystem Atari 8-bit disk image
PROCSPEC	SpectraSuite data
PROJ	BeOS CodeWarrior Project
PROJECT	Gambas Project
PROJECTMGR	ISE Project configuration
PROPERTIES	HSQLDB configuration
PROVBANK	Prophet V preset
PRPRESET	Adobe Premiere Preset
PRPROJ	Premiere Project
PRS	SNS-HDR Preset
PRT	MegaCAD Project
PRTL	Adobe Premiere Title
PRU2	Prorunner 2.0 Music
PRX/WME	Windows Media stream profile
PRZ	Lotus Freelance Graphics
PS	Postscript document
PS1XML	Windows PowerShell formatting
PSC	Spectrum Pro Sound Creator chiptune
PSCI	PETSCII character graphics
PSD	Adobe Photoshop image
PSEG/PSE	IBM Printer Page Segment
PSESS	Visual Studio Performance Session
PSF/PSFLIB	PSF Playstation Sound Format rip
PSF2/PSF2LIB	PSF2 Playstation 2 Sound Format rip
PSH	Photodex ProShow Show file
PSI	PCE Sector Image disk image
PSID/SID	SID tune
PSK	Unreal Engine character
PSL	Pattern Space Layout format
PSM	Epic Megagames MASI module (new format)
PSMDCP	NuGet Package Service MetaData Core Properties
PSO	Particle Systems 3D Object
PSO/VSO	Direct3DX9 Shader (4.09.00.1126)
PSP/PSPIMAGE	Paint Shop Pro Image
PSR	PowerSoft DataWindow - DataStore
PSSG	EGO Engine Textures
PST	LightWave 3D Preset
PSU	PSU Designer 2 project
PSV	Playstation 2-3 Save game
PSWX	Portable Password Depot XML data
PSX	Playstation single game save
PSY	Psycle module
PSYEXP	PsychoPy 2 Experiment
PT	Kodak Precision Transform
PT2	Picatune 2 soundtrack
PT3	Spectrum Pro Tracker 3 chiptune
PT36	ProTracker 3.6x module
PTB	Power Tab Guitar and Bass Tablature Editor
PTCOP	PxTone Collage module
PTF	LiveNote Portable legal Transcript File
PTG	Ambient Design ArtRage project
PTK	Pro Trekkr 2.0 module
PTL	Premiere title
PTM	Microsoft MapPoint map
PTN	TrendMicro HouseCall Cleaner database
PTO	Hugin Project
PTP	PMD 85 emulator tape image
PTS	PTgui project
PTTUNE	PxTone Collage module (protected)
PTX	RealLegal E-Transcript
PUB	ClickArt Personal Publisher document
PUBLISHPROJ	MSBuild website Project
PUBXML	Visual Studio Publish profile
PUD	WarCraft map (v2)
PUMPKIN	Pumpkin Shop stencil
PUP	Puppy Linux DotPup installer package
PURBLEPAIRSSAVE-MS	Microsoft Purble Pairs Saved game
PURBLESHOPSAVE-MS	Microsoft Purble Shop Saved game
PUT/INS	Microfox Company PUT compressed archive
PUZ	Across crossword puzzle
PVC	Panasonic Voice Container
PVD	PV3D scene description data
PVE	GoBe Productive Document (gen)
PVM	OSTA.org MusicPhotoVideo
PVN	Design and Print Business Edition document
PVR	Dreamcast PVR texture format
PVR/SPR	Dreamcast VR texture
PVSM	ParaView state
PVT	PlayStation RSD Pivot (gen)
PW	Pathetic Writer document
PWB	Password Boss data
PWC	Piecewise-Constant Image Model bitmap
PWD	Password Commander Pro database (v2.x)
PWF	PageWunder document
PWI	Pocket Word document
PWL	Windows 95 passwords
PWM	Seattle FilmWorks / PhotoWorks photo Meta file
PWP	Seattle FilmWorks / PhotoWorks photos
PX	PC-Axis data (var 1)
PXD	Pxlab experiment Design
PXE	Preboot Execution Environment
PXF	Phoenix RC simulator flying site
PXI	Pixie drawing / paint
PXL	Pocket Excel sheet
PXM	PCSX movie capture
PYA	PlayReady audio
PYC	CPython 1.x bytecode
PYD	Python Dynamic module
PYO	Python optimized code
PYV	PlayReady video
PZ	pzip compressed
PZ2	Poser pose
PZ3	Poser scene
PZA	Roxio/MGI PhotoSuite Album
PZF	GraphPad Prism project
PZFX	GraphPad Prism XML document
PZP	Roxio/MGI PhotoSuite Project
PZX	Perfect ZX Tape image
Q/PAK	Quantum compressed archive
Q3C	Quick 3D Cover project
Q3O	Quick3D Model
Q4	XLD4 bitmap
QAT	Office Quick Access Toolbar info
QBB	Intuit QuickBooks Backup
QBW	Intuit QuickBooks for Windows
QCF	Q-emulator Configuration
QCOW/IMG	QCOW disk image (gen)
QCOW2/IMG	QCOW2 disk image
QCP	QualComm PureVoice
QDA	Quadruple D Archiver compressed archive
QF	Ovi Maps info
QFILTER	Apple Quartz Filter
QIC	Windows 98 MSBackup backup set
QIF	Quality Information Framework document
QIP	Altera Quartus IP
QLB	Microsoft Basic 7.x Quick library
QLI	Statler Stitcher
QLPAK	Q-emuLator Package
QM	Qt Message
QMBL	LabQuest results
QMG	Qmage encoded data
QOP	3ds Quad colors
QP03	qpress compressed archive
QPU	Microsoft QuickPascal Unit
QPW	Quattro Pro for Windows spreadsheet
QR2	Delphi QuickReport
QRC	Qt Resource Collection
QRM	Allen Communications Quest Released Module (v5)
QRP	QuickReport Report
QRS	SlickRun MagicWord Pack
QSD	Quicken Win Data
QSF	Quintessential Player Family Skin
QSFLIB	QSF Capcom QSound Format rip
QSK	Quintessential Player Kid Skin
QST	HeroQuest Quest
QSYS	Qsys System
QTCH	Quicktime Cached data
QTIF/QIF	QuickTime Image Format bitmap
QTL	QuickTime Media Link
QTP	QuickTime Preferences
QTT	Qtracker Theme
QTZ	Quartz Composer data
QUERY	Microsoft PCHealth query
QUEST	Quest adventure
QVW	QlikView document
QW	QandA Write for Windows document (v3.0)
QWC	QuickBooks Web Connector configuration
QWK	QWK offline mail packet (ZIP compressed)
QWS	Quartus Workspace
QX	Quexal sourcecode
QXD	Quark XPress document
QXM	Quexal macro
QZD/QZE/QZS	QuizPro quiz data
R	Twist 2 Report
R2D	Reflex 2 Database
R2R	Reflex 2 Report
R2SKIN	Rainlendar 2 Skin
R3D	R3D data stream
R8	Cubicomp PictureMaker red channel image data
RA	RealAudio audio
RA3REPLAY	Red Alert 3 replay
RAC/RAW	Rdos Raw OPL Capture music
RAD	Reality ADlib tracker module/song
RAF	Fujifilm Raw image
RAM	RealMedia meta file
RAP	Raptor flowchart
RAR	RAR compressed archive (gen)
RAS	Max Payne data file
RAS/IM1/IM24/IM32/IM8/RAST/RS/SR/SUN	Sun Raster bitmap
RAT	PICS Rating System
RATDVD	ratDVD DVD image
RAV	Rave Reports Project
RAW	CT Raw disk image
RB	RocketBook eBook
RBC	Easy Resume Creator Pro resume
RBF	Raw Bitmap Font
RBFRM	REALbasic Form/Window
RBJ	Redcode Object XRA PC (v1.x)
RBN	Richard's Bridge Notation
RBP	REALbasic/Xojo Project
RBS	Propellerhead Software ReBirth Song
RBT	LEGO NXT Brick
RBVCP	REALbasic Project
RBX	Richard's Bridge Notation (inline)
RBXL	Roblox Location
RBXM/RBXMX	Roblox Model
RCAD	RealCADD drawing
RCD	Oloneo HDR preset
RCL	Easy CD Creator Layout
RCM	LigPlot Residue Centres-of-Mass data
RCS	RadDeveloper color scheme
RD	R documentation
RDATA	R saved work space
RDC	IDRISI Raster image Documentation
RDF	Friend of a Friend (FOAF) Resource Description Framework
RDG	RDCMan config
RDI	RIFF Device Independent Bitmap
RDL/RDLC	SQL Server Reporting Services Report Definition Language
RDOC_OPTIONS	Ruby RDoc Options
RDP	Remote Desktop Connection Settings
RDS	Ray Dream Studio
RDW	Real-DRAW Project
REAPEAKS	REAPER media peak information (v1.0)
REASON	Reason song
RED	REDway DER (Dynamic Elements Resource)
REDIF/RDF	ReDIF template
REF	Atari ST Guide ref links
REG	Windows Registry Data
REKO	REKO cardset
RELS	Open Office XML Relationships
REMOTEMAP	Reason Remote Mapping
REP	Business Objects Report
REPORT/TXT	GENSCAN output results
REPX	DevExpress Report layout (v1)
RESX	Microsoft .NET XML Resource template
REV	Revolution MetaCard stack
REX	ReCycled Audio Loop Export
REZ	LinTech resource
RFA	Revit Family Architecture project
RFL	Propellerhead Software Reason SoundBank
RFLW	Edge Reflow data
RFN/RFP/RFX	RoboForm saved data
RFX/G3X	RealFlight data
RGE	R.A.G.E. Driver
RGFX/RGX	IFF Retargetable Graphics bitmap
RGO	RepliGo virtual print
RGP	RealArcade Game Package
RGS	InstallShield Script for Windows Registry
RH	Rob Hubbard chiptune
RHL	Rathole compressed data
RIB	Renderman RIB
RIDL	RAD Studio Active X RIDL data
RIFF	Riff Raff module
RIP	Rocky Interlace Picture bitmap
RIR	Satori RIR scaled raster
RIX/SCX/SCI	ColoRIX bitmap
RJS	RealSystem Skin
RK	RK compressed archive
RKA	RK Audio lossless compressed audio
RLA	Alias Wavefront Raster bitmap
RLC	Radiant LoopCAD Project
RLE	Autodesk Screencast video (intermediate format)
RLF	ArtCAM 3D Relief model
RLG	RegCleaner v4.3 Language File
RLI	RealWorld Layered Image bitmap
RLL	Microsoft Resource Library
RLN	Alpha Four field rules
RM	Real Media stream
RM/RA	Real Audio
RMF	Rich Map Format
RMI	RMI RIFF MIDI Music
RMP	Magellan Raster Map
RMT	RASTER Music Tracker module
RMTL	Rhino 3D Material
RMVB	RealVideo Variable Bit Rate
RMX	RealMedia Secure clip
RND	AutoCAD Autoshade rendering slide
RNG	RELAX NG
RNQS	Pokemon Randomization Quick Settings
ROC	SpaceCAD rocket model
RODL	RemObjects Definition Language
ROL	AdLib Visual Composer music
ROM	Cloanto Amiga OS encrypted ROM
ROM/BIN	BIOS ROM Extension (IA-32)
ROQ	Id Software RoQ video
ROR	ROR Structured Feed
ROSE	Rosegarden musical notation (RV21)
ROT	Home World 2 - ROT graphics
ROTACT	ROT Object 3D Action
ROTOBJ	ROT Object 3D
RP2	RetroPlatform Player archive (old)
RP9	RetroPlatform Player archive
RPL	ARMovie video
RPM	RPM Package (generic)
RPMSG	Restricted-Permission Message
RPP	REAPER Project
RPROJ	RStudio Project
RPS	Propellerhead Software Reason Song
RPT	Crystal Reports output file (Report)
RPX	ActiveReports Report
RRA	Windows Installer temp data
RRD	RRD4J Round Robin Database
RRH	BlackBerry resource
RSDOC	DesignSpark Mechanical 3D Document
RSG	Drakan: Order Of The Flame Saved Game
RSH	Warhammer 40K textures
RSM	Resume
RSN	RAR packaged SPC soundtrack
RSND/IFF	IFF RSND audio
RSO	LEGO NXT brick audio
RSRC	BeOS Resource data
RSY	FLEXIT Multishot Survey Raw Data file
RT	RealTime subtitles
RTAB	RandyTab guitar tablature
RTBW	Syzygy tablebase win/draw/loss
RTBZ	Syzygy tablebase distance-to-zero
RTC	Office Live Meeting Connection
RTD	RagTime document
RTE	Autodesk Revit Template
RTF	Rich Text Format
RTI	Okino plugin Run Time Information
RTL	HP Raster Transfer Language
RTP	GROMACS Residue Topology
RTS	Roytal TS remote connection
RTST_PAK	Recursion Real-Time Stat Tracker Package
RTTEX	Robinson Technologies Textures
RTZ	RedTitan Zip
RULE	Golly Rule
RUN	AppImage Portable Linux App
RUS	Navitel 1.1 Map
RVD	Raster-Vector Hybrid Drawing
RVF	RichView Format (Unicode)
RVIZ	RViz workspace
RVL	Muvee project
RVPROJ	RPG Maker VX Project
RVPROJ2	RPG Maker VX Ace Project
RVT	Autodesk Revit Project
RW2/RAW	Panasonic RAW image
RW3	Regressi Win data
RWL	Leica RAW image
RWT	ReadWriteThink data
RWX	RenderWare 3d model
RWZ	Rawzor compressed raw image
RX2/REX	REX2 audio sample loop
RXDATA/RVDATA2	RPG Maker data
RXF	Recipe Exchange Format
RXM	GisRX GPS Navigator map
RXN	MDL Reaction format
RXO	Receiver Independent Exchange Format
RXT	X-Stitch Designer Gold Template
RZX	File Crypt encrypted
S	Digital Micrograph Script
S00	MEKA savestate
S01	Expert Witness compression Format SMART disk image
S10W	S10 WebAlbums project
S2	Stranded II Mapfile
S2A	SEAL 2 Application
S2K	Sasami Script subtitles
S2M	The Settlers 2 Map
S2MA	StarCraft 2 Map data
S2MH	StarCraft 2 Map Header
S2ML	StarCraft 2 Map Localization
S2QH	StarCraft 2 Localization Header
S2QL	StarCraft 2 Unit Localization
S3D	SEAM 3D Project
S3I/SMP	Scream Tracker/Digiplayer sample
S3M	Scream Tracker 3 module
S3O	Spring Engine 3D model
S4MI	skinner4moto module
S8THEME	Start8 menu Theme
S98	PC88/PC9801 sound logs rip
SA	Sonic Arranger module
SA2	Surprise! AdLib Tracker 2.0 module
SAC	Adobe Shared Asset Catalog
SAD	Black and White sounds data
SAF	Helix Stronghold Encrypted file
SAM	AMI Pro / Word Pro document
SAMI/SMI	SAMI captions
SAR	SAPCAR CAR compressed archive
SAS7BDAT	SAS v8+ data
SAT	ACIS Solid Model
SAV	Anacreon savegame
SAV/POW	Windows NT Registry Hive (SAV/POW)
SAV/SPV	American's McGee's Alice Saved Game File
SAVE	Doom 3 Savegame
SAZ	Fiddler Session Archive Zip
SB	Frostbite SuperBundle
SB2	Scratch 2.0 project
SBC	SBC compressed archive
SBGF	Grapher Graph
SBJ	Superbase Project
SBK	Emu Sound Font v1.0
SBL	Limbo Symbol table
SBMI	Space Engineers ModInfo
SBPF	Small Business Publisher document
SBQ	Superbase Query definition
SBT	Duxbury Scrub Table
SBV	Superbase form
SBW	Savings Bonds Wizard data
SBX	SeqBox container (gen)
SBZ	ShowBiZ project
SC	IRIS Showcase drawing / presentation
SC2	SimCity 2000 save game
SC2REPLAY	StarCraft 2 game replay
SC6	RollerCoaster Tycoon 2 scenario
SC68	sc68 soundchip music
SCC	Scenarist Closed Caption data
SCD	Agfa/Matrix SCODL bitmap
SCDOC	SpaceClaim Document
SCEN	Caligari TrueSpace Scene (v2.x)
SCENE	3D Master Scene
SCF	ChemWindow Standard Chemistry File
SCH	DProtel for Windows schematic
SCHDOC	Protel for Windows schematic capture (binary)
SCHEME	Programmer's Notepad Scheme
SCHLIB	Protel Schematic Library editor binary v1.2-2.0
SCHREPX	DevExpress Scheduler Report layout
SCL	FrontDesigner Scale setting
SCM	GIMP Script-Fu Script
SCM/SCX	StarCraft Map
SCN	Children of the Nile Scenario
SCNTOC	Softimage Scene TOC
SCO	Csound Score
SCP	Alpha Four Script
SCPT	Compiled AppleScript script
SCR	CA-Compete! Script
SCREEM	SCREEM project
SCRIPT	Aegis Animator Script
SCRIPTTERMINOLOGY	AppleScript Terminology
SCRIVX	Scrivener XML document
SCRPT	Genesis - The Third Day Script
SCT	Form Memo MS Visual FoxPro 7
SCUT	Easy Cut Studio project
SCW	Movie Magic Screenwriter document
SCX	Form MS Visual FoxPro 7
SCZ	Wingz script
SDA	Self-Dissolving compressed Archive
SDAT	Nintendo DS Sound Data
SDATA	MusicMaker Song Data
SDB	Pegasus SPS encoded audio
SDC	ArcGIS geospatial and attribute data
SDD	CBM .prg Studio Screen Designer Data
SDEF	Scripting Definition
SDF	Kawai music score
SDF/SDO	IEEE DASC Standard Delay Format
SDI	ArcGIS spatial and attribute indexes
SDINSTALL	Speckie Dictionary Installation
SDLPPX	SDL Trados Studio Project Package
SDLPROJ	SDL Trados Studio Project
SDLXLIFF	SDL Trados XLIFF Localization data
SDO	DB/TextWorks Database Deferred Update Directory
SDP	Session Description Protocol
SDR	Dell System Information
SDT	Siemens mobile theme
SDTID	SecurID Soft Token
SDW	StarOffice StarWriter document
SDX	CaptiveWorks satellite channel database
SDXML	SimpleDiagrams diagram
SDZ	Spring Engine Zipped mod
SE1	Swiss Ephemeris data
SEA	Mac Stuffit Self-Extracting Archive
SEARCHCONNECTOR-MS	Windows Search Connector
SEARCH-MS	Microsoft Vista Saved Search
SEEXPL	Spec Explorer results
SEG	SEG-2 data
SEP	ChemSep project
SEQ	Cyber Paint Sequence
SER	SER format video
SES	Cool Edit / Audition Session
SESSION	Session Manager Firefox Backup
SESX	Adobe Audition Session
SET	Alpha Four record Set
SEW	Janome (New Home) Sewing Machine stitch
SEX	SExtractor configuration
SF2	Standard SoundFont
SFARK	sfArk compressed SoundFont
SFB	PlayStation 3 Disc data
SFC	GEMPACK data management info
SFD	Mozilla Spam Filter Definition
SFF	Elecbyte M.U.G.E.N. sprites
SFL/SFP/SFT	LaserJet Soft Font
SFPACK	SFPack compressed SoundFont
SFS	sfxr Sample
SFT	ChiWriter Screen Font
SFVIDCAP	Sony Foundry Video Capture project
SFW	Seattle FilmWorks / PhotoWorks photo (SFW93)
SFX	Self-Extracting LHA Archive
SFX2	SoundFX 2 module
SFZ	SFZ Sample definition
SGA	SGA archive - game data
SGF	Smart Game Format
SGI	Silicon Graphics 24bit compressed bitmap
SGM/SGML	EAD - Encoded Archival Description
SGPBPRJ	SGP Baltie Project
SGPG	SGP Model Group
SGRIDDLER	SGriddler Paint-by-Number puzzle
SGT	Microsoft DirectMusic Segments Type
SH	Linux/UNIX shell script
SH3	Harvard Graphics presentation (v3.x)
SHAPE	Dia shape
SHEET	Dia sheet
SHFB	Sandcastle Help File Builder project
SHFBPROJ	Sandcastle Help File Builder Project
SHG	Segmented Hypergraphics bitmap
SHIPSECTION	Swords of the Stars Ship
SHK	NuFX archive
SHN	Shorten lossless compressed audio
SHO	ShroomPlayer module
SHP	ArcView Shape
SHPROJ	Visual Studio Shared Code project
SHPRST	LuSH-101 global Preset
SHR/SHAR/SHA	shar SHell self-extracting aRchive
SHS	Shell Scrap object
SHTMBR	LuSH-101 Timbre preset
SHV	Viking Designer 1 embroidery file
SHX	ArcView DataBase Index
SIA	Silo 3D model (ascii)
SIAG	Siag spreadsheet
SIARD	SIARD format
SIB	ShipInBottle compressed file
SID	LizardTech MrSID photo
SID2	Sidmon II module
SIF	SkyOS Installation File
SIG	IDA Signatures
SIM	ITI-SIM Model
SIMP	Software Ideas Modeler Project
SIMS2PACK	The Sims Compacted Resource file
SIMS3PACK	The Sims 3 game package
SIMSS	Software Ideas Modeler Style Set
SIMT	Software Ideas Modeler Template
SIS	EPOC Installation package (rel. 2,3,5)
SISX	Symbian Series 3 Installation file
SIT	Stuffit compressed archive
SITE	GoLive Website project
SITX	Stuffit X compressed archive
SIX	DEC SIXEL Graphic bitmap
SJAM	SuperJAM! song
SK	Skencil drawing
SK1	sK1 vector graphic
SKC	ISIS sketch
SKCHR	SketchChair document
SKD	AutoSketch Drawing
SKEIN	Skein replay data
SKF	skincrafter skin
SKI	Motorola phone skin info
SKL	Hondata S-Manager calibration
SKM	STarKos tune
SKN	Blaze Media Pro Skin
SKN/FHS	RoboHelp / FlashHelp skin
SKP	SketchUp model
SKR/GPG/PGP	Pretty Good Privacy (PGP) Private/Secret Keyring
SKS	Creature House Expression Skeletal Stroke
SKYT	SKYT/Drifters Packer song
SLA	Scribus document
SLDASM	SolidWorks Assembly
SLDDRW	SolidWorks Drawing
SLDPRT	SolidWorks (generic)
SLE	Surfplan kite project
SLK	SYLK - SYmbolic LinK data
SLOGO	StarLogo project
SLTNG	StarLogo TNG Project
SLTX	MATLAB Simulink model Template
SLX	MATLAB Simulink model
SM	SMath Studio worksheet
SMALI	Smali assembly source
SMC	Super Nintendo game - ROM Image
SMD	MicroMap map data
SMDLPROJ	SQL Server Report Model Project
SME	Samsung Kies Messages backup
SMENT	StarMade Entity
SMF	3D World Studio mesh
SMI	Lotus Smart Icon
SMI/SMO	Siemens archived SMS messages
SMK	Smacker movie/video
SMM	Smart Install Maker project
SMOD	Future Composer v1.0-v1.3 module
SMOL	Spartan molecule data
SMT	Memo File Apollo Database Engine
SMUFI	Picatune soundtrack
SMUS/SONG	SMUS IFF Simple Musical Score
SMV	Snes9x movie capture
SMW	SIMPL Windows source
SMX	SysMetrix skin
SMZIP	StepMania music package
SN	Sound Club module
SN2	Sound Club 2 module
SNAG	SnagIt capture
SNAGPROF	Snagit Profile
SNAPPY	Snzip compressed (comment-43 format)
SNB	S-Note document
SNC	Sonarc compressed RAW PCM audio
SND	Dalet Sound format audio (old)
SNDT	SndTool sound/audio
SNF	Starry Night Document
SNF/TRC	Sniffer capture
SNG	DeskMate song
SNK	Strong Name Key
SNM	Netscape Mail Message
SNOOP	snoop verbose trace
SNS	SNS-HDR project
SNSF/SNSFLIB	SNSF Super Nintendo Sound Format rip
SNSX	SNS-HDR 2.x project
SNT	Amnesia: T.D.D. sound entity
SNZ	Snzip compressed (snzip format)
SOBJ	Caligari TrueSpace 3D object (v2.x)
SOF	Quartus II Project
SOFT	Simple Omnibus in Text Format
SOL	Flash Shared Object file
SOLITAIRESAVE-MS	Microsoft Solitaire Saved game
SONG	AudioSauna Song
SOS	Adventure SOS compiled walkthrough
SOU	SBStudio II sounds
SOUND	The Music Studio Sound (Amiga)
SPA	Spectral Data file
SPARC	Skype Extra
SPC	Crimson Editor language specification file
SPC/SPS	Spectrum 512 compressed/smooshed bitmap
SPD	Bitstream Speedo font
SPE	Princeton Instruments WinView CCD image format
SPECCY	Speccy snapshot