Ext.
|
Description
|
Used by
|
A
|
ADA source code file
|
|
A
|
Library
|
Unix
|
A##
|
AlZip Compressed Files' pieces
|
|
A11
|
Graphics AIIM image file
|
|
A80
|
Assembler language source for 8080
|
|
AA, AB, ...
|
Split parts of a single whole file
|
split (Unix)
|
AAC
|
Advanced Audio Coding is a standardized, lossy compression and encoding scheme for digital audio.
|
|
AAF
|
AutoPatcher file
|
|
AAF
|
Advanced Authoring Format is an advanced media wrapper file for professional applications.
|
|
AAS
|
Animation Play Script
|
AAPlay
|
AB6
|
Datafile
|
ABStat
|
AB8
|
Datafile
|
ABStat
|
ABC
|
Document
|
ABC FlowCharter 1.0
|
ABP
|
Data
|
ABComp compressed
|
ABP
|
AVS Barcode Profile
|
AVS Barcode Source
|
ABF
|
Adobe Binary Screen Font
|
Adobe Systems Software
|
ABK
|
Automatic backup file
|
CorelDRAW
|
ABM
|
Image PALS album file
|
|
ABM
|
Album file (various programs)
|
|
ABR
|
Adobe Brush file for PhotoShop
|
PhotoShop
|
ABS
|
Abstracts (info file)
|
|
ABS
|
Data file
|
Abscissa
|
AC
|
Project backup
|
Audit Command Language (ACL)
|
ACA
|
Project
|
Project Manager Workbench
|
ACB
|
Archive
|
ACB
|
ACB
|
see ACMB
|
|
ACC
|
Program (DR-DOS - ViewMax)
|
GEM / resident
|
ACCDA
|
Data
|
Microsoft Access Database Wizard (Open XML)
|
ACCDB
|
Data
|
Microsoft Access Database (Open XML)
|
ACCDE
|
Data
|
Microsoft Access Database Wizard (Open XML)
|
ACCDT
|
Data
|
Microsoft Access Database Template (Open XML)
|
ACCDU
|
Data
|
Microsoft Access Database Wizard (Open XML)
|
ACE
|
Archive
|
ACE
|
ACF
|
Adobe Custom Filter for PhotoShop
|
PhotoShop
|
ACL
|
Project
|
Audit Command Language (ACL)
|
ACL
|
AutoCorrect List
|
Microsoft Office
|
ACM
|
Audio Compression Module add-on
|
Win
|
ACMB
|
Graphics file
|
|
ACO
|
Adobe Color Palette
|
|
ACT
|
ACTOR source code file
|
ACTOR
|
ACT
|
Animations Works Actor (Graphics cell)
|
Animation Works
|
ACT
|
FoxDoc Action Diagrams
|
FoxPro
|
ACT
|
Presentation
|
Action!
|
AD
|
AfterDark screensaver module
|
AfterDark
|
AD2
|
ADPCM 2-bit compressed voice file
|
ZFAX
|
AD3
|
ADPCM 3-bit compressed voice file
|
ZFAX
|
ADA
|
Ada source code file
|
|
ADB
|
Ada Package Body
|
|
ADC
|
Bitmap graphics (16 colors)
|
Scanstudio
|
ADC
|
Dictionary
|
Lingvo
|
ADD
|
OS/2 adapter device driver
|
|
ADF
|
Amiga Disk File
|
unADF, UAE, WinUAE etc...
|
ADG
|
Data
|
ADG 3D Scene
|
ADI
|
Graphics file
|
AutoCAD
|
ADI
|
Database Index File
|
Advantage Database Server
|
ADICHT
|
LabChart data acquisition file
|
ADInstruments
|
ADL
|
MCA adapter description library
|
QEMM
|
ADM
|
After Dark support file
|
AfterDark
|
ADM
|
ADEM file format
|
ADEM
|
ADI
|
Database Memo File
|
Advantage Database Server
|
ADN
|
Add-in
|
Lotus 1-2-3
|
ADR
|
After Dark support file
|
AfterDark
|
ADS
|
Ada Package Specification
|
|
ADT
|
WoW geographical map location file
|
Blizzard Entertainment games (various)
|
ADT
|
Datafile for cardfile application
|
HP NewWave
|
ADT
|
Dictionary
|
Lingvo
|
ADT
|
Fax
|
AdTech
|
ADI
|
Database Table
|
Advantage Database Server
|
ADV
|
GUS device driver
|
Gf166.com
|
ADX
|
Document
|
Archetype Designer
|
ADZ
|
Amiga Disk Zipped (See Amiga Disk File)
|
GZip
|
AEP
|
After Effects Project File
|
Adobe After Effects
|
AF2
|
Flowchart
|
ABC FlowCharter 2.0
|
AF3
|
Flowchart
|
ABC FlowCharter 3.0
|
AFI
|
Truevision bitmap graphics
|
|
AFL
|
Font file (for Always)
|
Lotus 1-2-3
|
AFM
|
Datafile for cardfile application
|
HP NewWave
|
AFM
|
Type 1 font metric ASCII data for font installer
|
ATM - many
|
AFP
|
Shape palette
|
ABC FlowCharter
|
AFT
|
Template
|
ABC FlowCharter 3.0
|
AFW
|
Workplace
|
ABC FlowCharter 3.0
|
AGR
|
ArcView ASCII grid
|
|
AHK
|
AutoHotkey script file
|
AutoHotkey
|
AI
|
Vector graphics file
|
Adobe Illustrator
|
AIF
|
see AIFF
|
|
AIFC
|
Audio Interchange File Format with Compression
|
|
AIFF
|
Audio Interchange File Format
|
Convert (c) Villena
|
AiM
|
Asm Text Mode Image File
|
The Ultimate Draw
|
AIN
|
Archive
|
AIN
|
AIN
|
Job schedule
|
AutoIntern
|
AIO
|
APL programming language file transfer format file
|
|
AIR
|
Adobe AIR installation package
|
The Adobe AIR runtime environment.
|
AIS
|
Array of Intensity Samples graphics file
|
Xerox
|
AIX
|
Datafile for cardfile application
|
HP NewWave
|
AKM
|
"Akai Multitimbral" sample information file
|
Akai S5000 and S6000 hardware samplers (MS-DOS-based) and compatible software samplers
|
AKP
|
"Akai Program" sample information file
|
Akai S5000 and S6000 hardware samplers (MS-DOS-based) and compatible software samplers
|
ALC
|
Molecular coordinates
|
Alchemy, RasMol
|
ALG
|
Activity Log
|
ARCSOLO
|
ALE
|
Avid Log Exchange (used in film & video editing)
|
Avid
|
ALL
|
Arts & Letters symbol and font files
|
Arts & Letters
|
ALL
|
Filelist w/ all files
|
FRQView
|
ALL
|
Format file for working pages
|
Always
|
ALL
|
General printer information
|
WordPerfect for Win
|
ALO
|
Almanac support file
|
|
ALT
|
Menu file
|
WordPerfect Library
|
ALZ
|
AlZip Compressed Files
|
|
AMD
|
Maxum chromatograph offline database
|
Siemens Maxum Chromatograph
|
AMF
|
Music (Advanced Module Format)
|
DMP
|
AMG
|
Archive
|
AMGC
|
AMG
|
System image file
|
ACTOR
|
AML
|
AutomationML
|
AutomationML Group
|
AMR
|
Audio format for mobile phones (Nokia, SonyEricsson)
|
|
AMS
|
Adobe Monitor Setup calibration file
|
PhotoShop
|
AMS
|
Music format
|
|
ANA
|
Lumina Decision Systems Analytica file
|
|
ANI
|
Animation cursors for Win
|
Win95 - WinNT
|
ANI
|
Animation
|
IconAuthor
|
ANM
|
Animation
|
Deluxe Paint Animator
|
ANN
|
Help Annotations
|
Windows 3.x
|
Ann
|
Multi volume ARJ archive
|
ARJ
|
ANS
|
ANSI character graphics (animation) file
|
ANSView
|
ANS
|
ASCII text ANSI character set
|
NewWave Write
|
AOL
|
America On-line for Windows DLL
|
Win
|
AOS
|
Add-On Software
|
Nokia 9000
|
AP
|
Archive
|
WHAP
|
AP
|
Datafile
|
Datalex EntryPoint 90
|
APC
|
Printer driver
|
Lotus 1-2-3
|
APD
|
Printer driver
|
Lotus 1-2-3
|
APE
|
Monkey's Audio (Lossless)
|
audio media players
|
APF
|
Printer driver
|
Lotus 1-2-3
|
API
|
Adobe Printer Ink file for PhotoShop
|
PhotoShop
|
API
|
Passed parameter file
|
1st Reader
|
API
|
Printer driver
|
Lotus 1-2-3
|
APL
|
APL work space format file
|
|
APL
|
Support module used by Manugraphics APL products
|
|
APL
|
EV-Dos Application File
|
|
APM
|
Authorware Macintosh
|
Authorware
|
APP
|
Add-in application file
|
Symphony
|
APP
|
Application object file
|
dBASE Application Generator
|
APP
|
Application
|
FoxPro
|
APP
|
Application and Application Bundle
|
Mac OS X
|
APP
|
Executable workflow / macro file
|
Automator
|
APP
|
Executable application file
|
DR-DOS - NeXTstep - Atari
|
APP
|
Generated application
|
FoxPro
|
APR
|
Employee performance review
|
Employee Appraiser
|
APW
|
Authorware Windows
|
Authorware
|
APX
|
Appexpert database file
|
Borland C++ 4.5
|
AR
|
Argon - for 3D Modeling
|
Ashlar-Vellum
|
AR7
|
Archive
|
AR7
|
ARC
|
Archive
|
ARC - PKARC/PKXARC - PKPAS - PKUNPAK - QUARK
|
ARC
|
Archive
|
SQUASH
|
ARD
|
Map
|
Holux - Alan
|
ARF
|
Automatic Response File
|
|
ARH
|
Archivers definitions file
|
DN
|
ARI
|
Archive
|
ARI
|
ARJ
|
Archive
|
ARJ - ARJZ
|
ARK
|
ARC archive
|
CP/M port of ARC file archiver
|
ARK
|
Archive
|
QUARK
|
ARK
|
Managing your Money Archive File
|
|
ARR
|
Arrangement
|
Atari Cubase
|
ART
|
Gerber artwork
|
Cadence Allegro
|
ART
|
First Publisher, Designworks, Greenstreet Draw graphic file
|
All GST/Greenstreet Draw products
|
ART
|
Graphics (scrapbook)
|
Art Import
|
ART
|
Graphics format (Another Ray Tracer)
|
PFS:1st publisher - Art Import
|
ARTX
|
file format
|
Artisteer
|
ARTX
|
file format
|
belightsoft Text Art
|
ARX
|
Archive
|
ARX
|
ASC
|
ASCII text file
|
|
ASC
|
Transport armor file
|
PGP
|
ASD
|
Autosave file
|
Microsoft Word
|
ASD
|
Presentation
|
Astound
|
ASD
|
Screen driver
|
Lotus 1-2-3
|
ASD
|
Spectral Data Set
|
ASD Inc. RS3 spectral acquisition program
|
ASE
|
Velvet Studio Sample
|
AWAVE
|
ASE
|
ASCII Scene Export
|
3D Studio
|
ASF
|
Datafile
|
STATGRAPHICS
|
ASF
|
Screen font
|
Lotus 1-2-3
|
ASF
|
Advanced Streaming Format (Compressed Windows audio/video)
|
Microsoft Corporation
|
ASK
|
SYSGEN answer file
|
RT-11
|
ASH
|
Assembly language header file
|
TASM 3.0
|
ASI
|
ASIC language source
|
ASIC
|
ASI
|
Assembler include file
|
Turbo C - Borland C++
|
ASM
|
Assembler language source
|
TASM, MASM, NASM, Yasm, FASM
|
ASMX
|
ASP.NET Web Service
|
Microsoft Corporation
|
ASO
|
Assembler object (object-oriented) file
|
Turbo Assembler
|
ASP
|
ASPECT source code file
|
Procomm Plus
|
ASP
|
Association of Shareware Professionals OMBUDSMN.ASP notice
|
|
ASP
|
Active Server Pages of Microsoft.Net
|
Microsoft Corporation
|
ASPX
|
ActiveX Server Pages of Microsoft.Net
|
Microsoft Corporation
|
ASS
|
Amalgam Scene Specification
|
Halo 2 Map Editor
|
ASS
|
Advanced SubStation Alpha (Subtitles)
|
|
AST
|
Adobe Color Separation table for PhotoShop
|
PhotoShop
|
ASV
|
Autosave File
|
MATLAB
|
ASW
|
Authorware Star
|
Authorware
|
ASX
|
Advanced Stream Redirector file, redirects to an ASF file (see ASF)
|
Microsoft Corporation
|
ASZ
|
Skin
|
AltDesk
|
AT2
|
Auto template
|
Aldus Persuasion 2.0
|
AT3
|
Atrac 3 Sound/music file
|
All Sony devices and programs with the Atrac 3+ specification
|
ATM
|
Adobe Type Manager data/info
|
|
ATN
|
Adobe Photoshop action
|
Adobe Photoshop
|
ATT
|
AT&T Group
|
GCGW
|
ATY
|
Produced when an association type is exported by 3D Topicscape
|
3D Topicscape
|
AU
|
Sun/NeXT/DEC Audio file
|
AWAVE, GoldWave
|
AU
|
Sound (audio) file
|
Sun Microsystems - Convert (c) Villena
|
AUD
|
Audio file
|
AudioRack
|
AUP
|
Audacity project file
|
Audacity
|
AUX
|
Auxiliary dictionary
|
ChiWriter
|
AUX
|
Auxiliary references
|
TeX/LaTeX
|
AUZ
|
Ableton Live File
|
Authorization File for Ableton Live
|
AVA
|
Publication
|
Avagio
|
AVB
|
AntiViral Toolkit Pro Bases
|
|
AVI
|
Audio Video Interleaved animation file
|
Video for Windows
|
AVR
|
Audio Visual Research
|
AWAVE
|
AVS
|
Audio Video Software
|
AVS Video Editor (video editing software)
|
AVT
|
AVATAR-coding files
|
A3E
|
AW
|
Text file
|
HP AdvanceWrite
|
AWA
|
Animations Works Accelerated Movie
|
Animation Works
|
AWD
|
Microsoft Fax At Work Document
|
Microsoft Fax At Work
|
AWK
|
AWK script/program
|
|
AWM
|
Animations Works Movie (as .AVI)
|
Animation Works
|
AWS
|
Data
|
STATGRAPHICS
|
Ax
|
Directshow filter file format
|
|
AXF
|
ARM Executable Image generated by the ARM tools.
|
|
AXM
|
Axmedis object
|
Axmedis Tools
|
AZD
|
Amazon Software Download
|
Amazon Software Download
|
AZW
|
DRM enabled eBook
|
All models of Amazon Kindle
|
AZW1
|
DRM enabled eBook with embedded fonts
|
All models Amazon Kindle
|
AZW2
|
Program file
|
All models of Amazon Kindle excluding Kindle 1
|
AZZ
|
Data file
|
AZZ Cardfile
|
Ext.
|
Description
|
Used by
|
B&W
|
Black and white graphics file
|
atari - mac
|
B&W
|
Mono binary screen image
|
1st Reader
|
B
|
Batch list
|
APPLAUSE
|
B
|
Grand Theft Auto saved game
|
Any of the 3D Grand Theft Auto games in either III or IV era.
|
B_W
|
Black and white graphics file
|
Atari - mac
|
B1N
|
Both mono and color binary screen image
|
1st Reader
|
B30
|
Printer font (JLaser - Cordata)
|
Corel Ventura Publisher
|
B8
|
Raw graphics file (one byte per pixel) plane two
|
PicLab
|
BA
|
Binary Archive
|
Scifer Archiver and Compression [External Header Mode]
|
BAC
|
Compiled BASIC
|
RT-11 BASIC-11
|
BAD
|
Bad file
|
Oracle Corporation - many
|
BAD
|
File which covers bad blocks on disk volume (not to be moved)
|
RT-11
|
BAK
|
Backup file
|
|
BAL
|
Music score
|
Ballade
|
BALANCE
|
Balance accounting sheet file
|
Balance
|
BAP
|
Blaze Audio Wave Information File
|
BlazeAudio MadCap Software
|
BAR
|
Horizontal bar menu object file
|
dBASE Application Generator
|
BAR
|
Info Bar for GFX2EXE
|
GFX2EXE
|
BAR
|
Broker Archive. Compressed file containing number of other files for deployment.[1]
|
IBM WebSphere Message Broker
|
BAS
|
BASIC language source
|
QuickBASIC - GW-BASIC - FreeBASIC
|
BAT
|
Batch file
|
MS-DOS, RT-11
|
BB
|
Database backup
|
Papyrus Design Group
|
BBL
|
Bibliographic reference file
|
TeX/BibTeX
|
BBM
|
Brush
|
Deluxe Paint
|
BBP
|
Playlist
|
BassBox
|
BBS
|
Bulletin Board System announce or text info file
|
|
BBS
|
Hudson-style messagebase
|
FTN software
|
BC!
|
Unfinished download
|
Unfinished BitComet download (a BitTorrent client)
|
BCF
|
Card data
|
Bingo Card Creator
|
BCH
|
Batch process object file
|
dBASE Application Generator
|
BCH
|
Datafile
|
Datalex EntryPoint 90
|
BCO
|
Outline font description
|
Bitstream Inc.
|
BCP
|
Borland C++ makefile
|
|
BCT
|
Backup dictionary
|
Clarion
|
BCW
|
Environment settings
|
Borland C++ 4.5
|
BDB
|
Bookends database
|
Bookends
|
BDC
|
Dictionary
|
Lingvo
|
BDEF
|
Builder Definition
|
Websphere Portlet Factory
|
BDF
|
Adobe Glyph Bitmap Distribution Format
|
Adobe Software
|
BDF
|
Binary update file
|
BUPDATE.EXE (c) TNT Techn.
|
BDF
|
Bitmap Distribution Format font file
|
X11
|
BDF
|
Datafile
|
Egret
|
BDM
|
Videoclip
|
AVCHD
|
BDMV
|
BluRay Video Data Content file
|
Media players / software that supports BluRay structure
|
BDR
|
Border
|
Microsoft Publisher
|
BDT
|
Dictionary
|
Lingvo
|
BEF
|
Bleck Encrypted File
|
|
BEZ
|
Outline font description
|
Bitstream
|
BF
|
Brainfuck sourcefile
|
|
BF2
|
Bradford 2 font
|
|
BFC
|
Briefcase Win95
|
Win95
|
BFM
|
Font metrics
|
unix/Frame
|
BFX
|
Fax
|
BitFax
|
BGA
|
Bitmap graphics
|
|
BGI
|
Borland Graphics Interface device driver
|
Turbo C - Turbo Pascal
|
BH
|
Blackhole
|
data compression format
|
BI
|
BASIC include file
|
Visual Basic - FreeBASIC
|
BIB
|
Bibliography (ASCII)
|
|
BIB
|
Database - not compatible with TeX format
|
Papyrus
|
BIB
|
Literature database
|
TeX/BibTeX
|
BIF
|
Binary Image Format b&w graphics file
|
Image Capture board
|
BIK
|
Bink video file (RAD Video)
|
|
BIN
|
Binary file, usually zero-start (.com analog)
|
|
BIN
|
SGI Powerflip
|
|
BIN
|
Text mode memory dump
|
The Draw - TUD - ACiDDraw - etc.
|
BIO
|
BioniX Wallpaper playlist file
|
BioniX Wallpaper Changer
|
BIO
|
OS/2 BIOS
|
|
BIT
|
Bitmap X11
|
|
BK!
|
Document backup
|
WordPerfect for Win
|
BK
|
Faxbook
|
JetFax
|
BK?
|
Backup file
|
|
BKn
|
Timed backup file for document window n
|
WordPerfect for Win
|
BKP
|
Backup file
|
Write - TurboVidion DialogDesigner
|
BKW
|
Mirror image of font set
|
FontEdit
|
BLD
|
BLoaDable picture
|
BASIC
|
BLD
|
SYSGEN Build procedure file
|
RT-11
|
BLEND
|
Blender3D Project File
|
Blender
|
BLG
|
Backup Log
|
ARCSOLO
|
BLK
|
Temporary file
|
WordPerfect for Win
|
BLP
|
Blizzard Game Picture
|
Blizzard Entertainment games (various)
|
BM
|
BitMap graphics file
|
|
BM3
|
UIQ3 Phone backup
|
|
BMK
|
Help Bookmarks
|
Windows 3.x
|
BMP
|
OS/2 or Win graphics format (BitMap Picture)
|
QPeg - CorelDraw - PC Paintbrush - many
|
BMPW
|
bitmap world-file - geo-references info
|
|
BMT
|
Ami Pro Button
|
Ami Pro
|
BNA
|
Data
|
Atlas Boundary
|
BNK
|
Adlib instrument bank file
|
|
BNR
|
Graphics Banner
|
Banner - Poster
|
BOK
|
Shamela Library book
|
Shamela Library Program
|
BOO
|
Book-format
|
READIBM
|
BOO
|
Compressed file ASCII archive created by BOO (msbooasm.arc)
|
msbooasm.arc
|
BOO
|
Boo programming language source file.
|
Boo Programming Language
|
BOT
|
Bot files, these go with JKB files
|
Quake 3 Engine
|
BPC
|
Chart
|
Business Plan Toolkit
|
BPOLY
|
Data
|
Prisms binary 3D object
|
BPP
|
Backup application
|
Clarion
|
BPT
|
Bitmap fills file
|
CorelDRAW
|
BR
|
Script
|
Bridge
|
BRD
|
Eagle Layout File
|
|
BRD
|
Tanzzle board file
|
Tanzzle
|
BRD
|
Cadence Allegro board file
|
Cadence
|
BRF
|
Braille
|
Braille embossers and refreshable displays
|
BRK
|
Fax
|
Brooktrout Fax-Mail
|
BRK
|
The Brake! Mailer REXX script
|
The Brake!
|
BRL
|
CAD
|
Ballistic Research Laboratory CAD
|
BS2
|
Archive
|
BS2.EXE
|
BSA
|
Archive
|
BSArc
|
BSC
|
Compressed Apple II file archive created by BINSCII
|
BINSCII
|
BSC
|
Database
|
Source Browser
|
BSC
|
Pwbrmake object file
|
Microsoft Fortran
|
BSP
|
Half-Life\Half-Life 2 map files
|
Valve Corporation
|
BSS
|
Casio Phone base
|
PC-LINK
|
BST
|
BiblioTex file (BiblioTex=bibliography file)
|
TeX
|
BSY
|
Busy flag
|
FTN soft
|
BTM
|
Batch-to-memory (quick batch)
|
4dos -ndos
|
BTN
|
Makeover Button file
|
|
BUFR
|
Binary Universal Form for the Representation of Meteorological Data
|
|
BUG
|
Bugs and Problems
|
|
BUN
|
LucasArts Bundle File
|
|
BUP
|
Backup file
|
|
BUT
|
Button definitions
|
Buttons!
|
BUY
|
Datafile format
|
movie
|
BVn
|
Overflow file below insert point in Doc n
|
WordPerfect for Win
|
BWB
|
Spreadsheet application
|
Visual Baler
|
BWR
|
Beware (buglist)
|
Kermit
|
BYU
|
BYU Movie
|
BYU
|
BZ2
|
Archive
|
bzip2
|
BZM
|
Map
|
Blitzkrieg
|
