| Extension |
Information |
|
AA
|
Audio Book |
|
AAC
|
MPEG-2 Advanced Audio Coding File |
|
AAX
|
|
|
ABA
|
Avant Browser Add-on (Avant Force) |
|
ABC
|
LithTech Game 3D Model (Touchdown Entertainment, Inc.) |
|
ABC
|
FlowCharter Data File (iGrafx (a division of Corel Inc.)) |
|
ABC
|
ABC Programming Language |
|
ABF
|
Altair Binary Format |
|
ABF
|
Binary Screen Font (Adobe Systems Incorporated) |
|
ABK
|
Any Automatic Backup |
|
ABK
|
AMOS Basic Data (SPSS Inc.) |
|
ABK
|
AMOS Music Bank |
|
ABM
|
Photo Impressions Album (ArcSoft, Inc.) |
|
ABM
|
Album |
|
ABM
|
Audition On-line Dance Battle Music (T3 Entertainment Co., LTD.) |
|
ABR
|
Photoshop Brush (Adobe Systems Incorporated) |
|
ABS
|
Avant Browser Skin (Avant Force) |
|
ABS
|
AB SuDoKu Sudoku Save Game (Andrei Baronov) |
|
ABS
|
Absolute Database Database (ComponentAce) |
|
ABW
|
AbiWord Document File (The AbiSource Community) |
|
AC
|
ACwin Project Data (Procedimientos-Uno, S.L.) |
|
AC
|
AC3D Geometry File (Inivis) |
|
AC3
|
AC3 Audio File Format |
|
ACC
|
Atari ST Executable |
|
ACC
|
Composer File (Microsoft Corporation) |
|
ACC
|
Graphic Accounts Accounts Data (FKJ Software) |
|
ACCDB
|
Access 2007 Database File (Microsoft Corporation) |
|
ACD
|
RSLogix 5000 Project File (Rockwell Automation) |
|
ACD
|
Sonic Foundry Acid Music File (Sony Corporation of America) |
|
ACD
|
Agent Character Definition (Microsoft Corporation) |
|
ACE
|
Jupiter Ace Snapshot |
|
ACE
|
Train Simulator Texture File (Microsoft Corporation) |
|
ACE
|
WinAce Compressed File (e-merge GmbH) |
|
ACL
|
ACL Desktop for Windows Data File (ACL Services Ltd.) |
|
ACL
|
Office AutoCorrect List (Microsoft Corporation) |
|
ACL
|
ArchiCrypt Live Secured Data Volume (Exklamate Software) |
|
ACM
|
Audio Compression Manager Driver (Microsoft Corporation) |
|
ACM
|
American Civil War File (Interactive Magic) |
|
ACS
|
Agent Character (Microsoft Corporation) |
|
ACT
|
Train Simulator Activity File (Microsoft Corporation) |
|
ACT
|
ADPCM Compressed File Recorded by Some MP3 Players/Voice Recorders |
|
ACT
|
Action! Presentation (Macromedia) |
|
ACTIVEX
|
|
|
ADA
|
ActiveDocs Answer Set |
|
ADB
|
Alphacam Diecut VB Macro (Planit) |
|
ADB
|
CorelCENTRAL Address Book (Corel Corporation) |
|
ADB
|
Ability Office Database (Ability Software) |
|
ADD
|
Advantage Database Server Data Dictionary (Sybase, Inc.) |
|
ADD
|
Alphacam Diecut Drawing (Planit) |
|
ADE
|
Access Project Extension (Microsoft Corporation) |
|
ADF
|
I-DEAS Associated Data File (EDS) |
|
ADF
|
Grand Theft Auto Vice City Radio Station (Rockstar Games) |
|
ADF
|
A.R.S.E.N.A.L. Extended Power Main Game File (Tactical Soft) |
|
ADI
|
Amateur Data Interchange Format (ADIF) File |
|
ADI
|
Advantage Database Server Database Index File (Sybase, Inc.) |
|
ADM
|
Portfolio Admin-level Acces Flag (Extensis, Inc.) |
|
ADM
|
Alphacam Diecut Parameter Macro (Planit) |
|
ADM
|
Windows Policy Template (Microsoft Corporation) |
|
ADP
|
Access Project (Microsoft Corporation) |
|
ADP
|
Alphacam Diecut Post (Planit) |
|
ADR
|
After Dark Random Screen Saver Module |
|
ADR
|
Address Book |
|
ADR
|
Opera Default Bookmark File (Opera Software ASA) |
|
ADS
|
ADA Package Specification |
|
ADT
|
Alphacam Diecut Tools (Planit) |
|
ADT
|
ACT! Document Template (Best Software CRM Division) |
|
ADT
|
Troj/Agent-GCO |
|
ADV
|
GUS Virtual Device Driver |
|
ADV
|
TAPCIS Advanced Commands (User Entered) |
|
ADX
|
Approach Index File (IBM) |
|
AEP
|
ArcExplorer Project (Environmental Systems Research Institute, Inc. (ESRI)) |
|
AEP
|
Alphacam Wire EDM Post (Planit) |
|
AEP
|
After Effects Project File (Adobe Systems Incorporated) |
|
AES
|
AES Crypt Encrypted File (Packetizer, Inc.) |
|
AEX
|
Alpha Five Compiled Add-in Library Script (Alpha Software, Inc.) |
|
AFM
|
Abassis Finance Manager Data File (SmartMedia Informatica) |
|
AFM
|
LOUT File |
|
AFM
|
Outline Font Metric (Adobe Systems Incorporated) |
|
AFP
|
Prismo Graphics ActiveFile Proxy (Apple Inc.) |
|
AFP
|
Alphacam Flame Post (Planit) |
|
AFP
|
IBM Transactional Data Format (Advanced Function Print) |
|
AFS
|
Filter Factory Photoshop Filter |
|
AFT
|
Ancestry Family Tree Data File (MyFamily.com Inc.) |
|
AHK
|
AutoHotkey Script (AutoHotkey) |
|
AI
|
AIwin Project Data (Procedimientos-Uno, S.L.) |
|
AI
|
EARS Component File |
|
AI
|
Illustrator Vector Graphic (Adobe Systems Incorporated) |
|
AIF
|
Audio Interchange File |
|
AIF
|
SymbianOS Application Information File |
|
AIF
|
OS/2 Program Information File (IBM) |
|
AIFF
|
Audio Interchange File |
|
AIR
|
SeeYou Airspace (Naviter) |
|
AIR
|
AIR Rich Internet Application (Adobe Systems Incorporated) |
|
AIR
|
Flight Simulator Aircraft Performance Info File (Microsoft Corporation) |
|
AJAX
|
|
|
AJP
|
Alphacam Water Jet Post (Planit) |
|
AJP
|
JPEG2000 Digital Surveillance Recorder Video |
|
ALB
|
Image Commander Album (Corel Corporation) |
|
ALB
|
Alphacam Laser VB Macro (Planit) |
|
ALB
|
Alpha Five Data Dictionary (Alpha Software, Inc.) |
|
ALL
|
Cubase or VST Song File (Steinberg) |
|
ALL
|
1-2-3 Always Working Page Format File (IBM) |
|
ALL
|
OS/2 Program List (IBM) |
|
ALX
|
Alpha Five Library Index (Alpha Software, Inc.) |
|
ALX
|
BlackBerry Application Loader File (Research in Motion Limited) |
|
ALX
|
ActiveX Layout File (Microsoft Corporation) |
|
ALZ
|
Game File |
|
ALZ
|
ALZip Compressed File (ESTsoft, Corp.) |
|
AMP
|
Alphacam 3D Mill, 2D Mill Post (Planit) |
|
AMP
|
Photoshop Arbitrary Map Settings (Adobe Systems Incorporated) |
|
AMP
|
Connectivity Memory Model AMPA and NMDA Parameters Input File |
|
AMR
|
Adaptive Multi-Rate ACELP Codec |
|
AMV
|
MTV Movie File |
|
AMZ
|
The Amazon Trail Saved Game |
|
AMZ
|
Amazon MP3 Downloader Download/Control File (Amazon.com, Inc.) |
|
ANB
|
Analyst's Notebook Analytical Chart (i2 Ltd.) |
|
ANI
|
NeroMix File (Nero AG) |
|
ANI
|
NEOchrome Animation |
|
ANT
|
calcAnt Saved Calculation (SFR GmbH) |
|
APA
|
AlfaPad Notes Organizer Document (AlfaAlfa Software) |
|
APE
|
Monkey's Audio Lossless Audio Compression Format (Matthew T. Ashland) |
|
APF
|
Acrobat Profile File (Adobe Systems Incorporated) |
|
APF
|
ATO Profile Editor File (E2S n.v.) |
|
APF
|
Lotus Printer Driver Fonts (IBM) |
|
API
|
WebObjects Interface (Apple Inc.) |
|
API
|
Lotus Printer Driver Info (IBM) |
|
API
|
1st Reader Passed Parameter File |
|
APK
|
Train Simulator Packaged Activity (Microsoft Corporation) |
|
APK
|
Android Package (Open Handset Alliance) |
|
APK
|
GameSpy Arcade Service (IGN Entertainment, Inc.) |
|
APL
|
APL Workspace/Source |
|
APL
|
Monkey's Audio Image Link File (Matthew T. Ashland) |
|
APM
|
AutoPlay Menu Studio Configuration (Indigo Rose Software) |
|
APM
|
Alphacam Punch Parameter Macro (Planit) |
|
APM
|
Aldus Placeable Metafiles (Adobe Systems Incorporated) |
|
APP
|
Clarion for Windows Application (SoftVelocity) |
|
APP
|
Alphacam Punch Post (Planit) |
|
APP
|
Ca Visual Objects Platform for Developer (CAVO) Project File (CA) |
|
APPLET
|
|
|
APPLICATION
|
ClickOnce Deployment Manifest (Microsoft Corporation) |
|
APR
|
Approach 97 File (IBM) |
|
APR
|
Employee Appraiser Performance Review File |
|
APS
|
Flash |
|
APS
|
Advanced Patching Systems with Error Checking |
|
ARB
|
Alphacam Router VB Macro (Planit) |
|
ARC
|
Insight II Cartesian Coordinate Archive File (Accelrys Software Inc.) |
|
ARC
|
FreeArc Compressed File |
|
ARC
|
Archive |
|
ARCHIVE
|
|
|
ARD
|
Alphacam Router Drawing (Planit) |
|
ARF
|
Flexible Image Transport System Bitmap |
|
ARF
|
AOL Instant Messenger (AIM) Resource File (America Online, Inc.) |
|
ARF
|
Active Tutor Data (4C Media, Inc.) |
|
ARJ
|
Compressed Archive |
|
ARM
|
Alphacam Router Parmeter Macro (Planit) |
|
ARM
|
Acorn ROM/Disk Image File |
|
ART
|
AOL Johnson-Grace Compressed File (America Online, Inc.) |
|
ART
|
ArtCAM Pro and ArtCAM Insignia Model Data (Delcam plc) |
|
ART
|
Alphacam Router Tool (Planit) |
|
ARV
|
Arsiv |
|
ARV
|
Eschalon Setup Archive (Eschelon Development (24-2979 Panorama Dr., Coquitlam BC V3E 2W8, Canada)) |
|
ARV
|
AutoRoute User Information (Microsoft Corporation) |
|
ARW
|
Sony RAW Image File (Sony Corporation of America) |
|
AS
|
Flash ActionScript Source Code (Adobe Systems Incorporated) |
|
AS
|
AppleSingle Encoded File (Apple Inc.) |
|
ASA
|
Active Server Document |
|
ASC
|
3D Point File |
|
ASC
|
ASCII Text |
|
ASC
|
Flash Server-Side ActionScript (Adobe Systems Incorporated) |
|
ASD
|
Advanced Streaming Format Description (Microsoft Corporation) |
|
ASD
|
Lotus Screen Driver (IBM) |
|
ASD
|
Word Automatic Backup (Microsoft Corporation) |
|
ASF
|
Electronic Arts Music File (Electronic Arts, Inc.) |
|
ASF
|
Advanced Streaming Format (Microsoft Corporation) |
|
ASF
|
Lotus Screen Font (IBM) |
|
ASL
|
Quest Adventure Game (Axe Software) |
|
ASL
|
AppSight Console Log (Identify Software Ltd.) |
|
ASM
|
Pro/ENGINEER Assembly File (PTC) |
|
ASM
|
Solid Edge Document (UGS PLM Solutions) |
|
ASM
|
Assembler Source Language |
|
ASP
|
Active Server Page |
|
ASP
|
Alphacam Stone Post (Planit) |
|
ASP
|
Aspen/2 Data Manager (Tekton Software, Inc.) |
|
ASPX
|
ASP.NET Source File (Microsoft Corporation) |
|
ASS
|
ASS I/O |
|
ASS
|
Aegisub Advanced SubStation Alpha Subtitle File (Rodrigo Braz Monteiro) |
|
ASS
|
Flash |
|
ASV
|
Train Simulator Computed Activity File (Microsoft Corporation) |
|
ASV
|
MATLAB Autosave File (The MathWorks, Inc.) |
|
ASV
|
DataCAD Autosave File (DATACAD LLC) |
|
ASX
|
Alpha Five Temporary Index (Alpha Software, Inc.) |
|
ASX
|
Advanced Stream Redirector File (Microsoft Corporation) |
|
ASX
|
ActiveSite Extension (Jonathon Rossi) |
|
ATN
|
Daqarta Extended Audio Data (Interstellar Research) |
|
ATP
|
Automise Project File (VSoft Technologies Pty Ltd.) |
|
ATP
|
Alphacam Lathe Post (Planit) |
|
ATP
|
Anti Tracks Plug-in (RIGHT Utilities, Inc.) |
|
ATT
|
SeeYou Waypoint (Naviter) |
|
ATT
|
Alphacam Lathe Tool (Planit) |
|
ATT
|
Web Form Data (POSTDATA.ATT) |
|
ATX
|
A ZIP-formatted Compressed Archive |
|
AU
|
Audacity Audio Block |
|
AU
|
uLaw/AU Audio File |
|
AUD
|
DTS Audio Data Stream (Digital Theater Systems Inc.) |
|
AUD
|
Audio File Used by Westwood Studios for Various Games |
|
AUP
|
Audacity Project File |
|
AUP
|
Windows Update File |
|
AUX
|
ChiWriter Auxilliary Dictionary File |
|
AUX
|
MegaHAL (Ai Research) |
|
AUX
|
Geospatial Imaging ERDAS IMAGINE and LPS Data File (Leica Geosystems LLC) |
|
AUZ
|
|
|
AVB
|
Accpac Macro Archive (Sage Software) |
|
AVB
|
Avid Bin File (Avid Technology, Inc.) |
|
AVC
|
Kaspersky Anti-virus Toolkit Database (Kaspersky Lab) |
|
AVCHD
|
|
|
AVD
|
DOS7 File |
|
AVI
|
Audio Video Interleave File |
|
AWD
|
Artweaver Painting (Boris Eyrich) |
|
AWD
|
FaxView Document (Microsoft Corporation) |
|
AWK
|
AWK Script |
|
AWS
|
ActiveWords System File (ActiveWord Systems, Inc.) |
|
AWS
|
AutoCAD Work Space (Autodesk, Inc.) |
|
AWS
|
Ability Office Spreadsheet (Ability Software) |
|
AWW
|
Ability Office Write Document (Ability Software) |
|
AWW
|
AWW WML Website Administrator Configuration File |
|
AX
|
DirectShow Filter (Microsoft Corporation) |
|
AX
|
MPEG-4 DVD Filter |
|
AX
|
ATI DA Interface Handler (ATI Technologies Inc.) |
|
AXD
|
ASP.NET Web Handler File (Microsoft Corporation) |
|
AXD
|
Actrix Technical 2000 (Autodesk, Inc.) |
|
AXX
|
AxCrypt Encrypted File (Axon Data) |
|
AZW
|
Kindle eBook Format (Amazon.com, Inc.) |
