List of filename extensions / A
This list contains common file name extensions that are used in some operating systems to differentiate between file formats . In other operating systems, file type identification is mainly carried out using the file header, and the MIME type is more important than the file name extension for e-mail attachments . Systems that use the latter two approaches usually ignore the extension completely.
| Filename extension | MIME type | Full name | Remarks, usage |
|---|---|---|---|
| .a | application / octet-stream | A rchive | Program library ( Unix ); rare: file archive |
| .a01, ..., .a99 | ARJ multi-volume archive | Part of a compressed file archive | |
| .a2l | A SAM MCD 2 MC l anguage | Description files for measurement and calibration variables of motor vehicle control devices ; standardized by ASAM e. V. | |
| .a3d | A CATEC 3D viewing model | - | |
| .a3l | A uthorware 3 .x l ibrary | - | |
| .a3m | Authorware MacIntosh file | unpackaged | |
| .a3w | Authorware Windows file | unpackaged | |
| .a4l | A uthorware 4 .x l ibrary | - | |
| .a4m | Authorware MacIntosh file | unpackaged | |
| .a4p | Authorware file | packaged without runtime | |
| .a4w | Authorware Windows file | unpackaged | |
| .a5l | A uthorware 5 .x l ibrary | - | |
| .a5w | Authorware Windows file | unpackaged | |
| .aa | A udible a udio | mostly for downloadable audio books | |
| .aac | audio / aac, audio / aacp | A dvanced A udio C Oding | MPEG 2/4 audio file |
| .aam | application / x-authorware-map | Authorware shocked file | - |
| .aar | A pache-Axis2-Application - Archive | - | |
| .aas | application / x-authorware-seg | Authorware shocked packet | - |
| .aax | A udible a udio e x tended | mostly for downloadable audio books | |
| .from | A pplix- B uilder file | - | |
| .abbu | A ddress B ook B ack u p | Mac OS X address book archive | |
| .abf | A dobe B inary Screen F ont | - | |
| .ABC | text / vnd.abc | ABC (music notation) | - |
| .abk | Backup file | PrintMaster Gold | |
| .abk | Corel Draw A uto B ac k up | - | |
| .abm | Audio a l b u m file | HitPlayer | |
| .abo | A pplix B uilder Turb o | - | |
| .abp | AniMake project file | - Can only be opened with AniMake | |
| .abr | A dobe br ushes | Adobe Photo Shop | |
| .Section | abs tract | Summary of a (scientific) document | |
| .Section | - | Standard GNU compiler output for the PC platform | |
| .Section | Abs olute database | ComponentAce PDA database system | |
| .abv | Ab i w ord document | Word processor AbiWord | |
| .ac3 | - | Dolby Digital audio file | |
| .aca | HTTP animation | Microsoft Agent | |
| .aca | - | Project Manager Workbench | |
| .acb | ACB M Graphic image | Image file | |
| .acb | - | A OL C a b Launcher | |
| .acc | DR-DOS Viewmax file | - | |
| .acc | Acc essory | GEM additional program (for PC-compatible DOS and Atari ST ) | |
| .acd | Character definition | Microsoft Agent | |
| .acd | Ac i d Song File | Acid by Sony Creative Software (music composition program) | |
| .acd | A rchi C rypts a password safe file | ArchiCrypt Password Safe Version 1 to 5 | |
| .acd | PLC project file | Project file created by Rockwell PLC software | |
| .ace | application / x-ace-compressed | ace archive | Compressed file archive |
| .acf | HTTP character file | Microsoft Agent | |
| .aci | ACI development appraisal | ACIWEB | |
| .acl | A uto C orrect L is | MS Word auto-correction list | |
| .acl | keyboard ac ce l erator file | Corel Draw 6 | |
| .acl | A RCHI C rypt L ive file | ArchiCrypt Live drive version 1 to 6 | |
| .acm | Dynamic Link Library | DLL | |
| .acm | Interplay compressed sound | Fallout 1.2, Baldur's Gate | |
| .acm | - | File in the Windows system directory | |
| .aco | A r C on O bject | ArCon Eleco object file | |
| .acp | A r C on P roject | ArCon Eleco project file | |
| .acp | Assistant Preview | Microsoft Office | |
| .acr | A merican C ollege of R adiology | - | |
| .acs | Character structured storage | Microsoft Agent | |
| .act | Act ion presentation | - | |
| .act | Foxdoc Act ion Diagram | Microsoft Visual FoxPro | |
| .act | Assistant Act or | Microsoft Office | |
| .acv | - | used to (de) compress audio data | |
| .acxml | A rchi C rypts a password safe file | ArchiCrypt Password Safe Version 6 | |
| .acyl | A rchi C r y pt L ive file | ArchiCrypt Live drive version 7 and 8 | |
| .ad | A fter D ark | Screen saver | |
| .ada | Ada source text | non-GNAT | |
| .adb | Ad a source text b ody | GNAT | |
| .adb | A ppointment d ata b ase | HP 100LX Organizer | |
| .adc | Color bitmap graphic | Scan studio 16 | |
| .add | OS / 2 ad apter d river | Used during the boot process | |
| .adf | A miga d isk f ile | - | |
| .adf | A dapter D escription F ile | Definition file from IBM | |
| .adi | A utoCAD d evice- i ndependent | binary plotter format | |
| .adi | Driver Description | Novell NetWare | |
| .adi | AOMEI Backupper | Backup Image File | |
| .adl | QEMM Mca a daptor d escription l ibrary | - | |
| .adm | A fter D ark M ultiModules | Screensaver (Microsoft) | |
| .adm | Windows NT policy template | - | |
| .adn | Lotus 1-2-3 add-in | - | |
| .adp | Astound Dynamite | - | |
| .adp | A ccess D atabase P roject | Microsoft Access project | |
| .adp | D ynamic P age | AOLserver | |
| .adp | FaxWorks Faxmodem setup file | - | |
| .adr | A fter D ark R andomizer | Screen saver | |
| .adr | Smart Ad d r ess address book | - | |
| .adr | Opera bookmark | Opera browser bookmarks | |
| .ads | Ada a source text s specification | GNAT | |
| .ads | AD I S | ADIS: Animal Data Interchange Syntax | |
| .adt | AdT ech fax | - | |
| .adt | data file for card applications | HP NewWave | |
| .adx | Archetype Designer Document | - | |
| .adx | Dynazip Active Delivery script | - | |
| .adx | Lotus Approach dBase Index | - | |
| .adz | Packed ADF | Zip compatible | |
| .ae | A uthor / E ditor | SoftQuad | |
| .aep | A rc e xplorer p roject | - | |
| .aep | Adobe A fter E ffects p roject | Animation project with Adobe After Effects | |
| .af2 | ABC FlowCharter 2.0 flowchart | - | |
| .af3 | ABC flowchart | - | |
| .afc | Apple sound file | - | |
| .afi | Truevision bitmap graphic | Image file | |
| .afm | A dobe f ont m etrics | Files that belong to a PostScript font | |
| .afm | Cardfile application | HP NewWave | |
| .ag | A pplix graphic | - | |
| .Conditions | Game Boy Advance ROM image | Dump a Nintendo - Game Boy Advance -Spiels for use in an emulator , rarely common extension, rather .gba | |
| .agr | Xmgrace project | Project file of the plot program Xmgrace | |
| .ahk | A uto h ot k ey | Script file of the AutoHotkey script language | |
| .ahn | Ahn en sheet file | Ahnenblatt | |
| .ahn | - | Win ancestors | |
| .ai | application / postscript | A dobe I llustrator drawing | - |
| .ai | Corel trace drawing | - | |
| .aif, .aiff | audio / aiff, audio / x-aiff | A udio I nterchange F ile F ormat | Audio file |
| .aifc | audio / aiff, audio / x-aiff | A udio I nterchange F ile F ormat c ompressed | compressed audio interchange format |
| .ail | A ndorra 2D- I mage- L is | Stringing together of images in any format, which are supplemented by meta information | |
| .aim | application / x-aim | A OL I nstant M essenger start file | - |
| .ain | AIN Compressed archive | - | |
| .aio | APL transfer file | - | |
| .ais | A CDSee I mage S equence | - | |
| .ais | Velvet Studio Instruments | - | |
| .ais | A rray of I ntensity S amples | Graphics file - Xerox | |
| .aix | Card file application data | HP NewWave | |
| .akw | - | Contains A keywords for RoboHELP Help Project Index Designer | |
| .akz | Accent file | - | |
| .alaw | European Telephony audio | - | |
| .alb | Alb to | JASC Image Commander | |
| .ale | A vid L og E xchange | is required by the AVID (TM) editing program, * .ale files are the basis
for the batch capture process d. H. Loading / digitizing of media data (from tapes, among other things) with the help of lists in which the exact In and Out points of the "clips" to be loaded are listed by time code (hh: mm: ss: frfr). Contains, among other things, In and Out points, name of the clip, description / comment, band name ... |
|
| .ali | document | SAP proprietary format | |
| .alias, .als | Alias Image | ||
| .as | A Bleton L ive S ongfile | Ableton audio recording software | |
| .Alles | A rts & L etters L ibrary | - | |
| .Alles | General printer information | WordPerfect for Windows | |
| .Alles | Song and Style Files | GEM WS series keyboards | |
| .Alles | Steinberg Cubase | Cubase song file | |
| .alo | Alamo file | Representation of models in the computer game Star Wars: Empire at War | |
| .old | WordPerfect Library Menu | - | |
| .old | old version | Backup copy of a file | |
| .alv | (MIS) Al ea V iew | MIS ALEA view definition, now part of PM Office Plus (manufacturer Infor) | |
| salt | ALZ ip | Compressed files with this filename extension can be processed with the 'ALZip' program. | |
| .at the | A pplix SHELF M acro | - | |
| .at the | A pp- M agic | - | |
| on the 1st | Adventure maker | - | |
| .amc | A nt M ovie C atalog | - | |
| .amdb | A pp- M agic- D ata b ank | - | |
| .amf | A sylum ( m odule / music) ( f ormat / file) | Tracker module ( music format ) of the Digital Sound and Music Interface | |
| .amf | A dvanced M odule F ormat | Music file | |
| .amg | ACTOR system image | - | |
| .amg | AMG C Compressed archive | - | |
| .ami | Annotation file | CoCreate OneSpace Designer | |
| .aml | A SAM MCD-2 MC m eta l anguage | Description file for interface-specific sizes (see .a2l); standardized by ASAM e. V. | |
| .aml | AutomationML | XML format for object-oriented description of system planning data; IEC 62714 | |
| .amlx | AutomationML | Compressed format for the object-oriented description of plant planning data; standardized in IEC 62714-1 Ed 2.0 | |
| .ampp | A pp- M agic P rogramm- P aket | - | |
| .amr | A daptive M ulti R ate | Audio data | |
| .ams | text / x-ansi (unofficial) | A NSI m u s ic | ANSI BBS - text file with ANSI music |
| .ams | Extreme's tracker module | - | |
| .ams | Velvet Studio music module | - | |
| .amz | Am a z on Digital Music Download | Meta information for the Amazon MP3 Downloader in the form of XML , formerly Base64 data | |
| .on | Text file | Sterling Software: Groundworks COOL Business Team Model | |
| .an8 | An im 8 or | Human readable (!) file format of the 3D animation program Anim8or | |
| .anc | Canon Computer Pattern Maker | List of color swatches | |
| .ani | application / x-navi-animation | Animated cursor | Mouse pointer graphic |
| .anim | anim ation | Animation (Amiga) | |
| .anm | DeluxPaint- An i m ation | - | |
| .anm | A bstract N etwork M odel | Exchange format for traffic network data between the traffic simulators VISSIM and VISUM | |
| .ann | Windows 3.x Help ann otation | - | |
| .ans | text / x-ansi (unofficial) | ANS I | Text file with ANSI escape sequences , e.g. B. ANSI Art |
| .ant | Sim Ant saved game
XML Apache ANT file |
-
Apache Ant Build Script file in XML format |
|
| .aob | A udio ob jects | On DVD-Audio discs | |
| .aoi | Art of Illusion - 3D scene | - | |
| .aol | A merica O n l ine file | - | |
| .aos | application / x-nokia-9000-communicator-add-on-software | A dd o n s oftware | Nokia 9000 |
| .aot | A pplication bindery o bject t emplate | Bindery version of the .axt file created by Novell SnAppShot. This file is read by Novell ZENworks for software distribution. | |
| .ap | Ap PLIX Presents | - | |
| .ap | WHAP Compressed Amiga archive | Compressed file archive | |
| .ap4 | Process file | ibo Process Designer | |
| .apc | Compiled ap pli c ation | Centura Team Developer | |
| .apc | Printer driver | Lotus 1-2-3 | |
| .apd | Dynamic application library | Centura Team Developer | |
| .apd | Printer driver | Lotus 1-2-3 | |
| .ape | Ape (English for monkey ) | Monkey's Audio files, losslessly compressing audio format | |
| .apf | Printer driver | Lotus 1-2-3 | |
| .apf | A llaire P roject F ile | created by Homesite | |
| .api | A pplication P rogram I nterface | used by Adobe Acrobat | |
| .api | Printer driver | Lotus 1-2-3 | |
| .apk | application / vnd.android.package-archive | A ndroid P ac k age | Installation file for Android applications |
| .apl | APL workspace file | Workspace in APL | |
| .apl | A rc P ad L ayer file | Project file from ArcPad, a mobile application from the ArcGIS product group | |
| .apl | Ap p l ication library | Centura Team Developer | |
| .app | App lication generator Object | dBase | |
| .app | Executable app lication | Executable files for GEM / ViewMAX ( PC-compatible DOS and Atari ST ) | |
| .app | Executable app lication | Container for programs or application bundles under macOS (or OS X, Mac OS X, Rhapsody , OPENSTEP , NeXTStep) | |
| .app | Generated app lication | Microsoft Visual FoxPro | |
| .app | Normal mode app lication | Centura Team Developer | |
| .app | Symphony add-in app lication | - | |
| .appcache | text / cache-manifest | App lication Cache | Cache Manifest |
| .apr | A rcView- Pr ojektdatei | ArcView GIS 3.x | |
| .apr | Employee Ap p r aiser Performance Review | - | |
| .apr | Lotus Ap p r oach View | View file from the IBM / Lotus Approach database management program | |
| .aps | application / mime | A dvanced p atching s ystems | similar to IPS with error control |
| .aps | - | Microsoft Visual C ++ file (Resource Editor) | |
| .apt | Lotus Approach Data view | - | |
| .apt | Text mode application | Centura Team Developer | |
| .apx | Ap pe x pert database | Borland C ++ | |
| .apx | Lotus A pproach P arado x -Specific information | - | |
| .aq | Applix data | - | |
| .aqf | A nalyzer Q ueries and F ilters | Actix | |
| .arc, .ark | application / octet-stream | SQUASH / Alexa archive | Compressed file archive |
| .arf | Automatic response | BMC Remedy Action Request System | |
| .arff | Attribute-Relation File Format | Weka machine learning file | |
| .ari | ARI Compressed archive | Compressed file archive | |
| .ari | Ari stotle audio | - | |
| .arj | application / arj, application / octet-stream | A rchive R obert J ung | Compressed file archive |
| .arl | AOL v4.0 organizer | - | |
| .arr | Steinberg Cubase | Cubase arrangement file | |
| .art | image / x-jg | AOL Image | Image file compressed using the Johnson Grace compression algorithm |
| .art | image / x-jg | Canon Crayola art | Image file |
| .art | Clip art | - | |
| .art | First Publisher Raster graphic | Image file | |
| .art | Ray tracer file | - | |
| .art | Xara Studio drawing | - | |
| .artx | Artisteer | - | |
| .artx | belightsoft Text Art | - | |
| .arw | Sony RAW | Image file in raw data format | |
| .arx | ARX Compressed Archive | Compressed file archive | |
| .arxml | AUTOSAR language | XML file in accordance with the AUTOSAR standard | |
| .arv | Automatic response | BMC Remedy Action Request System | |
| .as | A pplix S preadsheet | Spreadsheet | |
| .as | A ction S cript | Actionscript file ( Flash script language) | |
| .asa | - | Microsoft Visual InterDev | |
| .asc | text / plain, application / pgp-signature |
ASC II file | Text file, ASCII-encoded (possibly PGP-encrypted or contains PGP keys) |
| .ascx | ASP.NET Control | - | |
| .asd | Astound Presentation | - | |
| .asd | Display driver | Lotus 1-2-3 | |
| .asd, .asf | video / x-ms-asf | A dvanced S treaming F ormat | Audio / video file |
| .asd | A uto S AVE D atei | WinWord | |
| .ase | Swatches | Adobe file (Adobe Swatch Exchange) | |
| .ase | Velvet Studio Sample | - | |
| .asec | Android secure encrypted file | Format for encrypting Android applications (.apk files) introduced with version 2.2 in May 2010. | |
| .asf | Screen font | Lotus 1-2-3 | |
| .asf | StratGraphics data file | - | |
| .ash | Assembly language header | TASM 3.0 | |
| .asi | Assembler include file | Borland C ++ / Turbo C | |
| .asl | Style file | Adobe Photoshop | |
| .asm | text / x-asm | As se m bler source code | - |
| .asm | Pro / E assembly | - | |
| .asm | Solid Edge Assembly | - | |
| .asmdot | Assembly template | Assembly template SolidWorks , CAD | |
| .aso | As tound Dynamite O bject | - | |
| .asp | A ctive S erver P ages | Server script file | |
| .asp | As to and P resentation | - | |
| .asp | text / asp | Setup and connection script | Procomm Plus |
| .aspx | ASP.NET page | - | |
| .ass | A dvanced S ub S tation Alpha | Advanced SubStation Alpha Subtitle File | |
| .ast | Ast and multimedia file | - | |
| .ast | as sis t ant | Claris Works | |
| .asv | DataCAD Autosave file | - | |
| .asv | Matlab A uto s a v e file | - | |
| .asx | CA BrightStor ARCserve Backup script | - | |
| .asx | application / x-mplayer2, video / x-ms-asf, video / x-ms-asf-plugin | Microsoft Advanced Streaming Redirector | - |
| .at2 | Auto template | Aldus Persuasion 2.0 | |
| .atf | A PL transfer f ile | Export format for APL (programming language) | |
| .atm | A dobe T ype M anager data / info | - | |
| .atm | atm osphere | Atmosphere settings for Terragen | |
| .atn | A k t io n endatei | Adobe Photoshop | |
| .atr | - | Floppy image for 8 bit Atari emulators | |
| .att | AT & T Group 4 bitmap | Image file | |
| .atw | A ny T ime Delu x e for Windows | - | |
| .au | audio / basic, audio / x-au | A udio U -law | Audio file (Sun format) |
| .au | - | AICC course description | |
| .aud | Aud io file | Westwood Studios (Kyrandia 3, C&C, RedAlert, C&C: TS) | |
| .aup | easyLEARN Au thor P roject | Project file of the easyLEARN authoring system SDN AG | |
| .aup | Au dacity - P rojektdatei | Project file of the music program Audacity | |
| .aut | Aut oIt Script | AutoIt script file up to v. 2.64 | |
| .aut | easyLEARN Aut hor-Learning Resources Description | Description of the learning materials in easyLEARN author projects SDN AG . | |
| .au3 | Au toIt v 3 Script | AutoIt script file from v. 3.x | |
| .aux | Aux iliary Dictionary | ChiWriter | |
| .aux | Aux iliary Reference | TeX / LaTeX | |
| .aux | Geospatial Imaging ERDAS IMAGINE and LPS Data File | Metadata for non-ERDAS IMAGINE raster file formats | |
| .ava | Ava gio Publication | - | |
| .avb | Virus infected file | Inculan Anti-Virus | |
| .ave | Ave nue script | ArcView GIS 3.x | |
| .avi | application / x-troff-msvideo, video / avi, video / msvideo, video / x-msvideo | A udio V ideo I nterleave | Container file for video and audio streams (Windows) |
| .avp | Symbol palette | ArcView GIS 3.x | |
| .avr | A udio V isual R esearch | - | |
| .avs | A pplication V isualization S ystem | - | |
| .avs | video / avs-video | Stardent AVS-X Image | - |
| .avx | Extension | ArcView GIS 3.x | |
| .aw | A pplix W ords | - | |
| .aw | Text document | HP AdvanceWrite | |
| .awd | FaxView Document image | - | |
| .awdb | A ccess W alkerdesign D ata b ank | - | |
| .awk | AWK Script / Program | - | |
| .awm | A nimation W orks M ovie | - | |
| .awr | Telsis | Audio data | |
| .aws | StatGraphics Data | - | |
| .axe | Microsoft AutoRoute map | - | |
| .axl | A rcIMS X M L project | - | |
| .Axe | ASCII application object template | Text version of the .aot file generated by Novell SnAppShot. Contains all changes on the workstation. | |
| .Axe | Microsoft AutoRoute template | - | |
| .azk | Electronic application / offer procedure of the federal government | With easy software you can fill out the forms for applying for federal funds on your PC and print them out. | |
| .asw | A ma z on W ord | Amazon Kindle eBook format |