A File Extensions
Browse file types with extensions beginning with A.
| Extension | File Type | Popularity |
|---|---|---|
| .A | Static Library | 3.2 |
| .A00 | ALZip Second Split Archive File | 3.5 |
| .A01 | ALZip Third Split Archive File | 3.7 |
| .A02 | ALZip Fourth Split Archive File | 3.8 |
| .A1 | Compiled Free Pascal Archive | 3.0 |
| .A1WISH | Audials Wishlist File | 3.7 |
| .A26 | Atari 2600 ROM | 3.7 |
| .A2B | Adlib Tracker II Instrument Bank | 2.9 |
| .A2C | Alice Object File | 3.7 |
| .A2I | Adlib Tracker II Instrument File | 2.5 |
| .A2L | ASAP2 ECU Description File | 3.3 |
| .A2M | Adlib Tracker II File | 3.1 |
| .A2M | TS-AudioToMIDI Settings File | 3.5 |
| .A2P | Adlib Tracker II Pattern File | 3.5 |
| .A2T | Adlib Tracker II Tiny Module File | 1.5 |
| .A2THEME | Aston 2 Theme File | 4.1 |
| .A2W | Alice World | 3.3 |
| .A2W | Adlib Tracker II Instrument Bank with Macros | 2.0 |
| .A3D | Alternativa Player 3D Export File | 3.7 |
| .A3L | Authorware 3 Library | 1.8 |
| .A3M | Authorware 3 Macintosh File | 2.0 |
| .A3P | Alice 3 Project | 3.0 |
| .A3W | Authorware 3 Windows File | 3.3 |
| .A3W | Alice 3 World | 3.0 |
| .A3X | Compiled AutoIt v3 Script | 3.1 |
| .A4L | Authorware 4 Library | 3.0 |
| .A4M | Authorware 4 Macintosh File | 3.0 |
| .A4P | A4Desk Pro Project File | 3.8 |
| .A4W | Authorware 4 Windows File | 3.5 |
| .A52 | Atari 5200 Game ROM | 4.0 |
| .A52 | A/52 Audio | 2.7 |
| .A5L | Authorware 5 Library | 3.6 |
| .A5RPT | Alpha Five Project Report File | 2.3 |
| .A5W | Authorware 5 Windows File | 2.5 |
| .A5W | Alpha Five Webpage File | 4.1 |
| .A5WCMP | Alpha Five Web Components File | 4.4 |
| .A65 | Authorware 6.5 File | 4.0 |
| .A6P | Authorware 6 Project | 3.7 |
| .A6PAGE | Artisan 6 Page | 3.0 |
| .A6PROJ | Artisan 6 Project | 4.0 |
| .A78 | Atari 7800 ROM | 3.5 |
| .A7D | Authorware 7 Model | 3.5 |
| .A7L | Authorware 7 Library | 3.3 |
| .A7P | Authorware 7 Project | 4.3 |
| .A7R | Authorware 7 Runtime File | 3.7 |
| .A8S | Anim8or Script | 3.8 |
| .AA | Audible Audio Book File | 3.5 |
| .AA | Generic CD Image | 2.0 |
| .AA3 | ATRAC Audio File | 3.7 |
| .AAA | CryptoWall Ransomware Encrypted File | 1.3 |
| .AAB | Android App Bundle | 4.1 |
| .AAC | Advanced Audio Coding File | 3.4 |
| .AAE | Sidecar Image Edit File | 3.3 |
| .AAF | Advanced Authoring Format File | 3.4 |
| .AAI | Dune HD AAI Image | 3.5 |
| .AAM | Authorware Map File | 3.8 |
| .AAN | Pro Tools Elastic Audio Analysis File | 4.3 |
| .AAO | Agenda At Once File | 2.0 |
| .AAO | America's Army Map File | 4.1 |
| .AAR | Android Archive | 4.1 |
| .AAUI | Acrobat User Interface File | 3.4 |
| .AAWDEF | Ad-Aware Definitions File | 4.3 |
| .AAX | Audible Enhanced Audiobook File | 2.9 |
| .AAXC | Encrypted Audible Enhanced Audiobook | 3.0 |
| .AAXPLUGIN | Avid Audio eXtension Plugin File | 4.0 |
| .AB | Applix Builder File | 3.3 |
| .AB | DNA Sequence File | 3.7 |
| .AB | Ambling BookPlayer MP3 File | 3.3 |
| .AB | Android Debug Bridge Backup | 3.4 |
| .AB | Ford Vehicle As Built File | 2.3 |
| .AB1 | DNA Electropherogram File | 4.0 |
| .AB2 | Print Shop Address Book File | 1.9 |
| .AB3 | PhotoImpact 3 Album | 3.0 |
| .ABA | Palm Address Book Archive | 3.0 |
| .ABA | Avant Browser Add-on File | 2.8 |
| .ABBU | Address Book Backup | 3.6 |
| .ABC | ABC Music Notation | 4.3 |
| .ABC | ABC Source Code | 3.4 |
| .ABC | ActionScript Byte Code File | 3.7 |
| .ABC | Micrografx ABC FlowCharter 6 File | 2.8 |
| .ABCD | AudioVisual Book Data File | 4.0 |
| .ABCDDB | Apple Address Book Contact List | 3.3 |
| .ABCDP | Address Book CoreData Person File | 3.3 |
| .ABDATA | Adobe Bridge Data File | 3.4 |
| .ABEX | Enhanced Android Backup | 2.0 |
| .ABF | Adobe Binary Screen Font File | 3.3 |
| .ABF | Analysis Services Backup File | 3.5 |
| .ABI | DNA Chromatogram File | 3.6 |
| .ABI | AbiWord Plug-in | 2.2 |
| .ABK | Automatic Backup File | 4.3 |
| .ABK | Need for Speed Audio Archive | 4.2 |
| .ABK | Arena Opening Book File | 4.3 |
| .ABKPRJ | Ashampoo Backup Project | 3.5 |
| .ABM | Photo Album | 3.5 |
| .ABM | Music Album | 3.9 |
| .ABP | AVS Barcode Profile | 3.1 |
| .ABR | Adobe Photoshop Brushes | 3.7 |
| .ABS | Absolute Database File | 3.8 |
| .ABS | Avant Browser Skin File | 3.5 |
| .ABS | AB SuDoKu Saved Game | 1.8 |
| .ABS | TurboZIP Auto Compress Script | 2.0 |
| .ABT | Annotated Braille Text File | 3.4 |
| .ABU | Asus App Backup File | 3.9 |
| .ABU1 | ASUS Backup File | 4.1 |
| .ABW | AbiWord Document | 3.1 |
| .ABX | WordPerfect Address Book | 3.5 |
| .ABY | AOL Address Book File | 3.5 |
| .AC | Autoconf Script | 4.0 |
| .AC | AC3D 3D Definition File | 2.3 |
| .AC | Ancestral Quest Collaborative Database File | 3.5 |
| .AC$ | AutoCAD Temporary File | 2.7 |
| .AC3 | Audio Codec 3 File | 3.8 |
| .AC5 | ArtCut 5 Document | 2.7 |
| .AC6 | ArtCut 6 Document | 3.4 |
| .ACA | Agent Character Animation File | 2.0 |
| .ACB | AOL Cabinet File | 2.2 |
| .ACB | Adobe Photoshop Color Book File | 3.6 |
| .ACB | AutoCAD Color Book File | 2.4 |
| .ACB | ADX Audio Package File | 4.0 |
| .ACBL | Adobe Color Book Legacy File | 2.7 |
| .ACC | Graphics Accounts Data File | 3.7 |
| .ACC | GEM Accessory File | 3.8 |
| .ACCDA | Access Add-in File | 3.5 |
| .ACCDB | Access 2007 Database | 3.6 |
| .ACCDC | Microsoft Access Signed Package | 4.0 |
| .ACCDE | Access Execute Only Database | 4.0 |
| .ACCDR | Access Runtime Application | 3.3 |
| .ACCDT | Microsoft Access Database Template | 4.0 |
| .ACCDU | Access Add-in File | 3.8 |
| .ACCDW | Microsoft Access Database Link File | 2.8 |
| .ACCFT | Microsoft Access Data Type Template | 4.0 |
| .ACCOUNTPICTURE-MS | Windows 8 Account Picture File | 3.8 |
| .ACD | ACID Project File | 3.7 |
| .ACD | RSLogix 5000 Program | 3.3 |
| .ACD | Agent Character Definition | 2.0 |
| .ACD-BAK | MAGIX ACID Project Backup File | 3.0 |
| .ACD-ZIP | Sony ACID Project With Embedded Media File | 3.8 |
| .ACE | WinAce Compressed Archive | 3.5 |
| .ACELIVE | Acelive Broadcast File | 2.0 |
| .ACF | Agent Character Data File | 2.5 |
| .ACF | Adobe Photoshop Custom Filter File | 3.0 |
| .ACF | Steam Application Cache File | 4.0 |
| .ACF | X-Plane Aircraft File | 3.6 |
| .ACF | Google Earth Pro Aircraft | 3.5 |
| .ACFM | Adobe Composite Font Metrics File | 2.6 |
| .ACG | Agent Preview File | 1.0 |
| .ACG | Audio Comparer Group File | 3.0 |
| .ACID | ACID Encrypted File | 4.1 |
| .ACL | AutoCorrect List File | 3.7 |
| .ACM | Interplay Audio File | 3.9 |
| .ACMI | Tacview Flight Track File | 2.0 |
| .ACO | Adobe Photoshop Color Swatch File | 4.0 |
| .ACORN | Acorn Image | 2.5 |
| .ACP | Alfresco Content Package | 4.3 |
| .ACP | EditPlus Auto-Completion File | 3.5 |
| .ACP | aacPlus Audio File | 4.0 |
| .ACQ | AcqKnowledge Data Graph File | 2.8 |
| .ACR | American College of Radiology File | 2.0 |
| .ACR | ACRobot Script | 3.6 |
| .ACR | Acer eRecovery Management Backup File | 2.8 |
| .ACR | Audio Comparer Results File | 4.0 |
| .ACROBATSECURITYSETTINGS | Adobe Acrobat Security Settings File | 3.8 |
| .ACRODATA | Acrobat Data File | 4.2 |
| .ACROPLUGIN | Adobe Acrobat Plug-in | 4.2 |
| .ACS | Agent Character File | 3.7 |
| .ACS | Action Code Script | 3.5 |
| .ACS2 | AIMP Skin File | 4.0 |
| .ACS3 | AIMP Skin File | 3.8 |
| .ACSM | Adobe Content Server Message | 3.3 |
| .ACT | FoxPro Documenting Wizard Action Diagram | 2.8 |
| .ACT | ADPCM Compressed Audio | 3.8 |
| .ACT | Genesis3D Actor File | 3.4 |
| .ACT | DS Game Maker Action File | 3.7 |
| .ACT | Adobe Color Table File | 3.6 |
| .ACT | Alma CAD/CAM Document | 3.5 |
| .ACTC | Action(s) Collection File | 3.5 |
| .ACTION | Automator Action | 3.8 |
| .ACTM | AutoCAD Action Macro File | 3.3 |
| .ACTS | WWE 2K20 Animation | 3.0 |
| .ACTX | DS Game Maker Action Description File | 3.5 |
| .ACV | Photoshop Adjustment Curve | 3.8 |
| .ACW | Windows Accessibility Wizard File | 3.3 |
| .ACWW | Animal Crossing Wild World Pattern File | 4.1 |
| .ACX | Atari ST Program | 3.6 |
| .ACZ | AppCraft Project | 3.2 |
| .AD | After Dark Screensaver | 3.2 |
| .ADA | Ada Source Code | 4.0 |
| .ADADOWNLOAD | Adobe Download Assistant Partial Download File | 3.9 |
| .ADAME | Adame Ransomware Encrypted File | 4.0 |
| .ADB | Ada Body File | 3.6 |
| .ADB | Alpha Five Database File | 3.0 |
| .ADB | Ability Database File | 2.3 |
| .ADB | Now Contact Address Book Template | 1.3 |
| .ADBLOCK | Alpha Five Library Temporary File | 3.2 |
| .ADC | Scanstudio 16 Color Image | 2.2 |
| .ADCP | Adobe Device Central Project File | 3.1 |
| .ADD | Dynamics AX Developer Documentation File | 3.2 |
| .ADDIN | Visual Studio Add-in Definition File | 2.6 |
| .ADDISM | Addism Data File | 4.0 |
| .ADDOC | AudioDesk Project | 2.0 |
| .ADDON | CFS Console Add-on | 2.5 |
| .ADE | Access Project Extension | 3.0 |
| .ADF | Amiga Disk File | 3.5 |
| .ADF | ACT! Data File | 3.5 |
| .ADF | ESRI ArcInfo Binary Grid Format | 3.4 |
| .ADF | ARIS Express Document | 3.0 |
| .ADF | Archimedes Disk File | 2.3 |
| .ADF | Grand Theft Auto: Vice City Audio Data File | 3.4 |
| .ADF | Actual Drawing File | 1.0 |
| .ADG | Ableton Device Group | 2.7 |
| .ADI | AutoCAD Device-Independent Binary Plotter File | 4.0 |
| .ADI | Dynamics AX Developer Documentation Index File | 4.6 |
| .ADI | Active@ Disk Image Backup File | 3.6 |
| .ADI | AOMEI Backupper Disk Backup File | 4.0 |
| .ADI | Amateur Data Interchange Format | 3.6 |
| .ADICHT | LabChart Data File | 3.8 |
| .ADIDAT | ADInstruments Simple Data File | 2.0 |
| .ADIF | Amateur Data Interchange Format | 4.0 |
| .ADM | Administrative Template File | 3.8 |
| .ADM | Portfolio Admin-Level Access Flag | 4.2 |
| .ADML | Group Policy Language-Specific Administrative Template | 3.5 |
| .ADMX | Group Policy Administrative Template File | 4.4 |
| .ADN | Access Blank Project Template | 2.0 |
| .ADO | Adobe Photoshop Duotone Options File | 3.3 |
| .ADOBE | Dharma Ransomware Encrypted File | 3.0 |
| .ADOBEBRIDGE | Adobe Bridge URL FIle | 3.0 |
| .ADOC | AsciiDoc Document | 4.0 |
| .ADOFAI | A Dance of Fire and Ice Level | 4.2 |
| .ADOX | ActivDox Document | 3.0 |
| .ADP | Access Data Project | 3.6 |
| .ADPP | Adobe Device Profile Package | 4.0 |
| .ADR | Opera Bookmarks File | 3.0 |
| .ADS | Ada Specification File | 3.8 |
| .ADT | ACT! Document Template | 4.0 |
| .ADT | AutoCAD Audit Log | 3.0 |
| .ADT | World of Warcraft Map File | 3.5 |
| .ADT | ADTS Audio File | 3.1 |
| .ADTS | Audio Data Transport Stream File | 2.3 |
| .ADU | Addict User Dictionary File | 1.3 |
| .ADV | Ableton Device Preset File | 2.8 |
| .ADV | Audio Driver File | 3.4 |
| .ADV | Nortek Acoustic Doppler Velocimeter File | 2.3 |
| .ADVS | Adobe Device Central Device Set | 2.0 |
| .ADX | Approach Index File | 4.1 |
| .ADX | ADX Audio | 3.3 |
| .ADZ | Compressed Amiga Disk File | 3.7 |
| .AD_PRT | Alibre Design Part | 2.0 |
| .AEA | Ae Timer Alarm Document | 3.6 |
| .AEA | AdWords Editor Archive | 3.0 |
| .AEA | ATRAC1 Audio File | 3.0 |
| .AEC | Cinema 4D After Effects Composition | 3.9 |
| .AECACHE | After Effects Cache File | 2.9 |
| .AECAP | After Effects Text Template | 2.5 |
| .AEGRAPHIC | Adobe After Effects Graphic | 2.9 |
| .AEP | After Effects Project | 4.2 |
| .AEP | Activ E-Book Project | 3.9 |
| .AEP | Advanced Encryption Package Encrypted File | 3.0 |
| .AEPKEY | Advanced Encryption Package Key File | 3.3 |
| .AEPX | After Effects XML Project | 3.7 |
| .AES | AES Crypt Encrypted File | 3.4 |
| .AES | ooVoo Log File | 2.2 |
| .AESIR | Locky Ransomware Encrypted File | 2.0 |
| .AET | After Effects Project Template | 3.1 |
| .AETX | After Effects XML Project Template | 3.1 |
| .AEX | Alpha Five Compiled Global Functions File | 3.5 |
| .AEX | After Effects Plug-in | 3.8 |
| .AF2 | Micrografx ABC FlowCharter 2 File | 2.6 |
| .AF3 | Micrografx ABC FlowCharter 3/4 File | 2.7 |
| .AFBOOK | Affinity Publisher Book | 4.3 |
| .AFBRUSHES | Affinity Brushes File | 3.0 |
| .AFC | Mass Effect 2 Audio File | 3.8 |
| .AFD | Alphacam Flame Drawing | 4.0 |
| .AFD | AFF Disk Image Part File | 3.0 |
| .AFDESIGN | Affinity Design Document | 3.8 |
| .AFE | Avid File Exchange File | 1.5 |
| .AFF | AFF Disk Image | 3.2 |
| .AFF | Spellcheck Dictionary Description File | 3.9 |
| .AFF | Arcaea Chart | 4.5 |
| .AFI | AOMEI Backupper File Backup File | 3.8 |
| .AFM | Adobe Font Metrics File | 2.9 |
| .AFM | AFF Metadata File | 2.0 |
| .AFMACRO | Affinity Photo Macro File | 2.0 |
| .AFMACROS | Affinity Photo Macros File | 2.0 |
| .AFP | FileProtector Encrypted File | 3.1 |
| .AFP | Advanced Function Presentation File | 3.6 |
| .AFPACKAGE | Affinity Package | 2.0 |
| .AFPHOTO | Affinity Photo Document | 4.3 |
| .AFPK | Audfprint Peaks Audio Fingerprint | 1.7 |
| .AFPLOC | Apple Filing Protocol Location | 2.5 |
| .AFPUB | Affinity Publisher Document | 4.3 |
| .AFS | STAAD.foundation Project File | 4.3 |
| .AFT | Ancestry.com Family Tree Database | 3.5 |
| .AFTEMPLATE | Affinity Template | 3.7 |
| .AFX | Auto FX PhotoGraphic Edges Image | 3.0 |
| .AFZPLUG | AfterShot Pro Plugin Archive | 2.0 |
| .AGB | Game Boy Advance ROM | 3.3 |
| .AGD | AgileGraph Data File | 3.0 |
| .AGD | Agile Advantage E-mail Attachment | 1.0 |
| .AGE3REC | Age of Empires 3 Recording | 3.8 |
| .AGE3SAV | Age of Empires 3 Save File | 4.4 |
| .AGE3SCN | Age of Empires 3 Scenario File | 4.2 |
| .AGE3XREC | Age of Empires 3: The WarChiefs Recording | 3.6 |
| .AGE3XSAV | Age of Empires 3: The WarChiefs Save File | 4.0 |
| .AGE3YREC | Age of Empires 3: The Asian Dynasties Recording | 3.3 |
| .AGE3YSAV | Age of Empires 3: The Asian Dynasties Save File | 4.1 |
| .AGG | Bulk Data File | 3.0 |
| .AGG | AggFlow 6 Project | 2.0 |
| .AGG | Autograph Graph FIle | 3.0 |
| .AGGR | Adobe Captivate Aggregate File | 2.5 |
| .AGI | Asterisk Gateway Interface File | 3.7 |
| .AGIF | Active GIF Creator Project | 3.0 |
| .AGLIB | Adobe Lightroom Library | 4.0 |
| .AGM | DTS Multi-channel Pro Packer File | 3.5 |
| .AGMODULE | Adobe Lightroom Module | 3.5 |
| .AGP | ArtGem Project File | 3.3 |
| .AGR | Ableton Groove File | 3.4 |
| .AGTEMPLATE | Adobe Lightroom Template | 2.0 |
| .AGTOOLKIT | Adobe Lightroom Toolkit | 2.0 |
| .AGX | AGT Game File | 4.0 |
| .AHD | Dynamics AX Online Help Data File | 2.0 |
| .AHI | Dynamics AX Online Help Index File | 3.0 |
| .AHK | AutoHotkey Script | 4.3 |
| .AHL | eMule Metadata File | 3.0 |
| .AHS | Adobe Halftone Screen File | 2.8 |
| .AHU | Adobe Photoshop HSL File | 3.0 |
| .AHX | AHX Music Tracker Module | 3.6 |
| .AI | Adobe Illustrator Artwork | 3.9 |
| .AI | Battlefield 2 Artificial Intelligence File | 3.1 |
| .AIA | Adobe Illustrator Action File | 3.3 |
| .AIA | MIT App Inventor Project | 3.8 |
| .AIC | Advanced Image Coding File | 2.5 |
| .AIC | Adobe Illustrator Cloud Document | 3.5 |
| .AIDL | Android Interface Definition Language File | 4.0 |
| .AIF | Audio Interchange File Format | 3.6 |
| .AIF | Symbian Application Information File | 2.9 |
| .AIFB | AIF Builder Project File | 4.0 |
| .AIFC | Compressed Audio Interchange File | 2.8 |
| .AIFF | Audio Interchange File Format | 3.6 |
| .AIM | AOL Instant Messenger Launch File | 3.0 |
| .AIM | AIMMS ASCII Model File | 3.6 |
| .AIML | Artificial Intelligence Markup Language File | 4.0 |
| .AIMPPL | AIMP Playlist File | 4.0 |
| .AIN | AIN Compressed Archive | 2.3 |
| .AIN | Source Engine Compiled AI Nodegraph File | 3.7 |
| .AIP | Adobe Illustrator Plug-in | 3.6 |
| .AIP | Advanced Installer Project | 4.0 |
| .AIP | Actual Installer Project | 4.0 |
| .AIR | Adobe AIR Installation Package | 4.0 |
| .AIR | M.U.G.E.N Animation File | 3.3 |
| .AIR | Flight Simulator X Flight Dynamics | 2.0 |
| .AIS | ACDSee Image Sequence File | 3.3 |
| .AIS | Velvet Studio Advanced Instrument System | 3.5 |
| .AIT | Adobe Illustrator Template | 3.4 |
| .AIU | Advanced Installer Updates Configuration File | 4.0 |
| .AIV | AIVault Data File | 4.0 |
| .AIV | Stronghold Crusader AI Village File | 3.0 |
| .AIX | AIX Audio File | 3.0 |
| .AIX | MIT App Inventor Extension | 3.4 |
| .AJP | CCTV Video File | 3.1 |
| .AKP | Akai Sampler File | 4.0 |
| .AKS | Arkos Tracker Module | 2.0 |
| .AL | A-Law Compressed Sound Format | 3.1 |
| .ALAC | Apple Lossless Audio Codec File | 4.1 |
| .ALAW | A-Law Compressed Sound Format | 2.0 |
| .ALB | Alpha Five Library | 3.5 |
| .ALBM | HP Photo Printing Software Album File | 3.3 |
| .ALBUM | GLC_Player Album File | 3.7 |
| .ALC | Dynamics AX Label Description File | 3.0 |
| .ALC | Ableton Live Clip File | 3.8 |
| .ALD | Dynamics AX Application Label Data File | 4.0 |
| .ALDF | Aldfaer Genealogy File | 3.0 |
| .ALE | Avid Log Exchange File | 3.7 |
| .ALF | ACT! Lookup File | 3.9 |
| .ALF | Alf Interactive Test | 2.8 |
| .ALF | Unity License Request File | 3.3 |
| .ALG | AlgoBox Algorithm File | 4.0 |
| .ALI | Dynamics AX Label Index File | 3.8 |
| .ALI | RoboHelp Alias File | 4.0 |
| .ALL | Cubasis Project File | 3.1 |
| .ALL | Java RMI Policy File | 3.3 |
| .ALM | Alpha Five Library | 3.9 |
| .ALP | Ableton Live Pack File | 4.0 |
| .ALP | AnyLogic Project File | 3.3 |
| .ALPX | ACDSee Luxea Video Editor Project | 3.0 |
| .ALR | ADRIFT Language Resource File | 3.0 |
| .ALS | Ableton Live Set File | 4.0 |
| .ALT | Dynamics AX Temporary File | 2.7 |
| .ALV | Adobe Photoshop Levels File | 3.5 |
| .ALX | ActiveX Layout Control File | 3.5 |
| .ALX | BlackBerry Application Loader XML File | 4.3 |
| .ALX | Alpha Five Library Index File | 3.0 |
| .ALZ | ALZip Archive | 3.3 |
| .AM | Automake Makefile Template | 3.5 |
| .AM | Anark Media File | 2.8 |
| .AM1 | Adventure Maker | 4.2 |
| .AM4 | AutoPlay Media Studio 4 Project File | 4.0 |
| .AM5 | AutoPlay Media Studio 5 Project File | 3.0 |
| .AM6 | AutoPlay Media Studio 6 Project | 3.5 |
| .AM7 | AutoPlay Media Studio 7 Project | 3.6 |
| .AMB | AIMMS Model File | 1.7 |
| .AMB | All My Books Database File | 3.3 |
| .AMB | Sonic 4 Game Asset Container | 3.7 |
| .AMC | AMC Video File | 3.9 |
| .AMC | Ant Movie Catalog File | 4.1 |
| .AMDN | Amadine Drawing | 3.5 |
| .AME | ABBYY FineReader Dictionary | 2.0 |
| .AMF | Advanced Module File | 4.0 |
| .AMF | Additive Manufacturing File | 4.2 |
| .AMF | Asylum Music Format Audio File | 3.0 |
| .AMFM | Adobe Multiple Font Metrics File | 3.8 |
| .AMGP | AntiMicro Profile | 3.7 |
| .AML | Microsoft Assistance Markup Language File | 2.7 |
| .AML | Arc Macro Language File | 3.6 |
| .AML | ACPI Machine Language File | 4.2 |
| .AML | Abstract Markup Language | 2.9 |
| .AML | Automation Markup Language File | 3.8 |
| .AMM | All My Movies Database File | 3.3 |
| .AMOGUS | Among Us Settings | 4.5 |
| .AMP | Photoshop Adjustment Map | 2.9 |
| .AMR | Adaptive Multi-Rate Codec File | 3.4 |
| .AMS | Adobe Monitor Setup File | 2.6 |
| .AMS | Extreme Tracker Module | 2.2 |
| .AMS | Velvet Studio Advanced Module System | 3.2 |
| .AMSORM | OnLine Ringman Auction Client File | 3.0 |
| .AMU | PictureGear Studio Photo Album File | 2.5 |
| .AMV | Actions Media Video | 3.1 |
| .AMX | Adobe Motion Exchange File | 3.7 |
| .AMX | AMX Mod Plugin File | 4.2 |
| .AMXD | Ableton Max Patch File | 4.0 |
| .AMXX | AMX Mod X Plugin File | 4.4 |
| .AMZ | Amazon MP3 Downloader File | 2.9 |
| .AMZ | Gameloft Android Market ZIP | 3.0 |
| .AN | Adobe Edge Animate Project File | 2.2 |
| .AN1 | Street Atlas USA Draw File | 3.5 |
| .AN2 | Croc Legend of the Gobbos Animation File | 3.0 |
| .AN8 | Anim8or File | 4.1 |
| .AN8 | Vector NTI DNA File | 3.7 |
| .ANA | Animate Asset Package | 2.0 |
| .ANB | Analyst's Notebook Chart | 3.0 |
| .ANE | Adobe AIR Native Extension | 3.8 |
| .ANG | Anghami Audio File | 3.9 |
| .ANH | Project ROME File | 3.0 |
| .ANI | Windows Animated Cursor | 4.3 |
| .ANIM | Maya Animation File | 3.8 |
| .ANIM | Amiga Animation File | 2.5 |
| .ANIM | Unity Animation File | 3.7 |
| .ANIM | Antibody Animation File | 1.1 |
| .ANIME | Anime Studio Document | 3.8 |
| .ANIMEACTION | Anime Studio Action Document | 2.4 |
| .ANIMEBRUSH | Anime Studio Brush Document | 1.0 |
| .ANIMEEXPORT | Anime Studio Export Profile Document | 3.5 |
| .ANIMEPROJ | Anime Studio Document Data File | 1.0 |
| .ANIMESTYLE | Anime Studio Style Document | 1.5 |
| .ANIMSET | FaceFX Animation Set File | 4.0 |
| .ANIMSET_INGAME | FaceFX In-Game Animation Set File | 1.7 |
| .ANJUTA | Anjuta IDE Project File | 2.7 |
| .ANM | 3D Animation File | 3.8 |
| .ANM | DeluxePaint Animation | 4.0 |
| .ANME | Anime Studio Document | 3.4 |
| .ANN | Windows Help Annotations | 2.3 |
| .ANN | Lingvo Dictionary Annotation File | 3.4 |
| .ANNOT | Adobe Digital Editions Annotations File | 2.3 |
| .ANP | Animate Preferences File | 2.0 |
| .ANS | ANSI Text File | 3.8 |
| .ANS | HotDocs Binary Answer File | 2.3 |
| .ANSYM | Adobe Edge Animate Library File | 3.0 |
| .ANT | Animate Tutorial | 2.0 |
| .ANTISPAM5 | Personal AntiSpam Settings File | 4.0 |
| .ANTMPL | Adobe Edge Animate Template File | 2.0 |
| .ANX | HotDocs Answer File | 3.5 |
| .ANX | Annodex Exchange Format File | 3.5 |
| .ANY | AnyRail Layout Plan | 3.7 |
| .ANYDESK | AnyDesk Remote Session Recording | 2.0 |
| .ANZ | ENVI Image Annotation | 2.0 |
| .AO | ActionOutline Outline File | 2.3 |
| .AOB | DVD-Audio Audio Object File | 3.7 |
| .AOD | Dynamics AX Object Data File | 4.2 |
| .AOF | Artlantis Object File | 3.3 |
| .AOI | Dynamics AX Application Object Index File | 2.0 |
| .AOI | Art of Illusion 3D Scene | 2.9 |
| .AOIS | CFS Console Add-on Installer Settings | 2.6 |
| .AOL | America Online File | 2.8 |
| .AOM | After Effects Output Module | 2.5 |
| .AOS | ARCHOS PCtablet Firmware File | 3.5 |
| .AP | Active Page | 3.7 |
| .AP | ArtPro File | 4.1 |
| .APA | RSView Development Project Archive | 3.6 |
| .APALBUM | Aperture Album File | 3.5 |
| .APC | CRYO Interactive APC Audio | 4.0 |
| .APD | ACDSee Photo Document | 3.2 |
| .APD | Eclipse Plugin Descriptor File | 3.4 |
| .APE | Monkey's Audio | 2.9 |
| .APE | AVS Plugin Effects File | 3.2 |
| .APEX | Android Pony Express Package File | 3.7 |
| .APEXT | AudioPipes Extension | 3.0 |
| .APF | Adobe Profile File | 3.7 |
| .APF | Sony Ericsson Firmware Acoustics File | 4.0 |
| .APH | Ability Album File | 2.3 |
| .API | Acrobat Plug-in | 3.8 |
| .API | Adobe Photoshop Inks File | 4.2 |
| .APINOTES | Swift Objective-C API Note | 3.5 |
| .APK | Android Package File | 4.3 |
| .APK | Alpine Linux Package | 3.8 |
| .APKG | Exported Anki Flashcard Deck | 4.0 |
| .APKM | Android App Bundle Mirror | 3.7 |
| .APKS | APK Set Archive | 3.7 |
| .APL | ArcPad Layer File | 4.0 |
| .APL | ACDSee Plugin File | 3.3 |
| .APL | Monkey's Audio Track Information File | 3.9 |
| .APLG | Audials Plug-in | 4.2 |
| .APLIBRARY | Aperture Library | 4.4 |
| .APLP | Audials Plug-in Package | 3.4 |
| .APM | Aldus Placeable Metafile Image | 3.8 |
| .APMC | Archipelago Minecraft Multiworld Seed | 3.7 |
| .APNG | Animated Portable Network Graphic | 3.6 |
| .APNX | Amazon Page Number Index File | 4.2 |
| .APP | macOS Application Bundle | 4.0 |
| .APP | FoxPro Generated Application | 3.2 |
| .APP | Symbian OS Application | 3.3 |
| .APP | Wii U Game Data File | 3.3 |
| .APP | Nintendo Wii WAD Archive | 3.3 |
| .APP | HarmonyOS App Pack | 3.4 |
| .APPCACHE | HTML5 Cache Manifest File | 3.9 |
| .APPCONTENT-MS | Application Content File | 2.8 |
| .APPDOWNLOAD | Mac App Store Partially Downloaded App | 3.7 |
| .APPEX | OS X Application and System Extension File | 4.3 |
| .APPIMAGE | Linux Software Package | 3.9 |
| .APPLESCRIPT | AppleScript File | 3.5 |
| .APPLET | Eclipse Java Applet Policy File | 4.1 |
| .APPLICATION | ClickOnce Deployment Manifest File | 3.9 |
| .APPODEAL | Appodeal Text File | 3.3 |
| .APPREF-MS | Microsoft Application Reference File | 3.8 |
| .APPROJ | ActivePresenter Project | 3.9 |
| .APPUP | Erlang Application Upgrade File | 3.8 |
| .APPX | Windows App Package | 4.2 |
| .APPXBUNDLE | Windows App Bundle | 4.5 |
| .APPXMANIFEST | Windows 10 App Manifest | 3.7 |
| .APPXSYM | Windows 8 App Package Symbols File | 3.5 |
| .APPXUPLOAD | Windows 8 App Upload Package | 3.8 |
| .APR | ArcView Project File | 2.5 |
| .APR | Apadana Project File | 2.0 |
| .APR | Animate Publish Profile | 2.0 |
| .APS | Visual C++ Resource File | 2.6 |
| .APS | Greeting Card Studio Project File | 4.0 |
| .APT | Almost Plain Text File | 3.8 |
| .APX | Ability Photopaint Studio Image | 2.8 |
| .APX | Archicad Add-on | 3.5 |
| .APXL | Keynote Presentation Data File | 3.9 |
| .APZ | Autoplay Media Studio Exported Project | 4.3 |
| .AP_ | ADT Android Developer Package | 3.7 |
| .AQ | Ancestral Quest Database File | 3.5 |
| .AQM | AlpineQuest Map File | 3.3 |
| .AQT | AQTitle Subtitles File | 3.2 |
| .AQX | AlpineQuest XML Map Configuration | 2.0 |
| .AQZ | Ancestral Quest Backup Database File | 3.5 |
| .AR | Unix Static Library | 3.4 |
| .AR | Midtown Madness Data File | 3.8 |
| .AR | Arc System Works Archive | 1.0 |
| .ARA | Archivaldo Resource Archive | 4.3 |
| .ARB | Application Resource Bundle | 2.5 |
| .ARC | Compressed File Archive | 3.5 |
| .ARC | African Safari Data File | 3.5 |
| .ARC | Nintendo Archive File | 3.5 |
| .ARC | Norton Backup Archive | 4.0 |
| .ARC | Symbian OS Backup File | 3.2 |
| .ARC | Minecraft: Legacy Console Edition Archive | 3.0 |
| .ARC | WWE 2K18 and 2K19 Cache File | 3.0 |
| .ARC | Internet Archive Web Archive | 3.0 |
| .ARC.LH | Nintendo Archive File | 2.8 |
| .ARCH00 | F.E.A.R. Game Archive | 4.4 |
| .ARCHITECT | SQL Power Architect Project | 3.4 |
| .ARCHIVE | Cyberpunk 2077 Mod | 3.5 |
| .ARCHIVER | Archiver Compressed File Archive | 3.5 |
| .ARCPROJ | ARRIRAW Converter Project | 1.3 |
| .ARCUT | Prelude Rough Cut File | 3.7 |
| .ARD | ArtiosCAD Workspace File | 3.3 |
| .ARDUBOY | Arduboy Game Package | 4.0 |
| .ARENA | Quake 3 Engine Arena File | 4.2 |
| .AREXPORT | Spark AR Effects Package | 3.6 |
| .ARF | WebEx Advanced Recording File | 3.2 |
| .ARFF | Attribute-Relation File Format | 3.5 |
| .ARFX | Spark AR Effect | 3.6 |
| .ARG | AutoCAD Profile | 2.9 |
| .ARH | ArheoStratigraf Project File | 1.0 |
| .ARH | ProTool Compressed Project File | 2.2 |
| .ARI | ARI Compressed Archive | 3.2 |
| .ARI | ARRIRAW Image | 3.3 |
| .ARIA | Chipsounds Sound File | 4.0 |
| .ARIA2 | aria2 Control File | 3.5 |
| .ARIAX | Chipsounds XML Sound File | 3.0 |
| .ARJ | ARJ Compressed File Archive | 3.5 |
| .ARK | PowerDesk Pro Archive | 3.4 |
| .ARK | ARK: Survival Evolved World File | 2.8 |
| .ARKPROFILE | ARK: Survival Evolved Player Profile File | 4.5 |
| .ARKTRIBE | ARK: Survival Evolved Tribe File | 3.3 |
| .ARL | AOL Organizer File | 3.9 |
| .ARM | ArmorPaint Asset | 3.5 |
| .ARN | Autoruns Data File | 4.3 |
| .ARO | SteelArrow Web Application File | 4.3 |
| .ARP | Advanced RAR Password Recovery Setup | 4.0 |
| .ARP | Audition Replay File | 4.1 |
| .ARPACK | ArtRage Package | 1.8 |
| .ARPATCH | Spark AR Patch Asset | 3.0 |
| .ARPROJ | Spark AR Project | 1.3 |
| .ARPROJPKG | Spark AR Project Package | 3.0 |
| .ARR | Amber Graphic | 3.5 |
| .ARR | Advanced RAR Password Recovery Auto-Save | 3.7 |
| .ARR | MultiMedia Fusion Array File | 4.0 |
| .ARS | Carmageddon Saved Game | 1.0 |
| .ARS | After Effects Render Settings File | 3.3 |
| .ARSC | Android Package Resource Table | 4.0 |
| .ARSCRIPT | ArtRage Script | 2.8 |
| .ART | AOL Compressed Image File | 3.0 |
| .ART | Art Document | 2.3 |
| .ART | Artifacts Artifact File | 1.8 |
| .ART | ArtCAM Model | 3.5 |
| .ART | BERNINA Embroidery File | 2.9 |
| .ART | Visual Paradigm Online Artwork | 3.5 |
| .ART50 | BERNINA ARTlink 5 Embroidery File | 2.0 |
| .ART60 | BERNINA ARTlink 6 Embroidery File | 2.0 |
| .ART70 | BERNINA ARTlink 7 Embroidery File | 3.0 |
| .ART80 | BERNINA ARTlink 8 Embroidery File | 4.5 |
| .ARTB | Artboard Document | 2.3 |
| .ARTICLE | Twixl Publisher Article | 3.3 |
| .ARTPAGE | Artisan 5 Page | 2.0 |
| .ARTPROJ | Artifacts Project | 2.0 |
| .ARTWORK | ArtStudio Image | 1.8 |
| .ARW | ArtStudio Image | 3.1 |
| .ARW | Sony Alpha Raw Digital Camera Image | 3.9 |
| .ARX | AutoCAD Runtime Extension File | 3.3 |
| .ARXML | AUTOSAR XML File | 4.1 |
| .AS | ActionScript File | 3.7 |
| .AS | AppleSingle File | 1.8 |
| .AS | AngelScript File | 3.6 |
| .AS2 | ActivStudio Resource Pack | 1.3 |
| .AS2PROJ | FlashDevelop ActionScript 2 Project File | 3.6 |
| .AS3PROJ | FlashDevelop ActionScript 3 Project File | 3.7 |
| .AS4 | askSam Backup File | 3.7 |
| .ASA | ASP Configuration File | 3.5 |
| .ASAMU | A Story About My Uncle Level Map | 1.0 |
| .ASAR | Electron Archive | 4.2 |
| .ASAT | Assemble SAT 3D Model File | 2.3 |
| .ASAX | ASP.NET Server Application File | 4.1 |
| .ASB | Alphacam Stone VB Macro File | 2.3 |
| .ASC | ASCII Text File | 3.6 |
| .ASC | Autodesk ASCII Export File | 3.5 |
| .ASC | ActionScript Communication File | 3.6 |
| .ASC | PGP ASCII Armored File | 4.0 |
| .ASC | LTspice Circuit Schematic File | 3.6 |
| .ASCII | ASCII Text File | 2.8 |
| .ASCS | ActionScript Communication Server File | 2.0 |
| .ASCX | ASP.NET User Control File | 3.7 |
| .ASD | Microsoft Word AutoSave File | 3.7 |
| .ASD | Ableton Live Sample Analysis | 4.1 |
| .ASDB | Asphyre Sphinx Archive File | 3.0 |
| .ASDT | AnthemScore Project | 4.3 |
| .ASE | Velvet Studio Advanced Sample System | 1.8 |
| .ASE | Autodesk ASCII Scene Export File | 2.1 |
| .ASE | Adobe Swatch Exchange File | 3.3 |
| .ASE | Aseprite Sprite File | 4.3 |
| .ASEC | Android Secure Application File | 4.1 |
| .ASEF | Adobe Swatch Exchange File | 4.0 |
| .ASEPRITE | Aseprite Sprite File | 3.6 |
| .ASEPRITE-DATA | Aseprite Theme Auxillary File | 2.0 |
| .ASEPRITE-EXTENSION | Aseprite Extension | 3.0 |
| .ASF | Advanced Systems Format File | 3.7 |
| .ASH | KoLmafia ASH Script | 1.6 |
| .ASH | Audiosurf Audio Metadata File | 1.5 |
| .ASH | Nintendo Wii System Menu File | 2.3 |
| .ASHBAK | Ashampoo Backup Archive | 2.6 |
| .ASHDISC | Ashampoo Burning Studio Image | 4.0 |
| .ASHPRJ | Ashampoo Burning Studio Project | 2.5 |
| .ASHX | ASP.NET Web Handler File | 3.5 |
| .ASI | Alpha Five Variable File | 3.7 |
| .ASI | ASI Mod Script | 4.3 |
| .ASICE | ASiC-Extended Data Container | 2.5 |
| .ASK | askSam Database | 3.7 |
| .ASK | Ableton Live Skin | 2.7 |
| .ASL | Photoshop Style | 4.1 |
| .ASL | LiveSplit Auto Splitter Script | 3.3 |
| .ASM | Assembly Language Source Code File | 4.0 |
| .ASM | Solid Edge Assembly File | 3.0 |
| .ASM | Pro/ENGINEER Assembly File | 3.3 |
| .ASM | Visual Studio Assembler Source Code File | 3.4 |
| .ASMDOT | SolidWorks Assembly Template | 3.0 |
| .ASMX | ASP.NET Web Service File | 2.5 |
| .ASND | Adobe Sound Document | 3.3 |
| .ASP | Active Server Page | 3.6 |
| .ASP | Adobe Color Separation Setup File | 3.3 |
| .ASPK | Android Split Package | 3.8 |
| .ASPX | Active Server Page Extended Webpage | 3.8 |
| .ASR | ActionScript Remote Document | 3.7 |
| .ASR | Adobe Photoshop Scratch File | 2.6 |
| .ASR | Audio Streaming Resource Archive | 3.7 |
| .ASS | Aegisub Advanced SubStation Alpha File | 3.4 |
| .ASS | Splinter Cell Blacklist Game Data File | 2.6 |
| .ASSET | Unity Asset | 4.0 |
| .ASSETPROJ | Camtasia Studio Asset Information File | 4.0 |
| .ASSETS | Unity Asset File | 3.7 |
| .ASSTRM | Splinter Cell Blacklist Game Data File | 2.3 |
| .AST | Adobe Color Separations Table | 2.5 |
| .AST | ClarisWorks Assistant File | 3.0 |
| .AST | Ability Spreadsheet Template | 3.0 |
| .AST | Nintendo Wii Music File | 3.0 |
| .ASTRO | Astro Website Component | 4.0 |
| .ASTX | Active Server Template Extended File | 4.4 |
| .ASV | Adobe Photoshop Selective Color File | 2.3 |
| .ASV | Finale 2012 Auto-Saved Score | 2.8 |
| .ASV | MATLAB Autosave | 4.5 |
| .ASVF | Asphyre Sphinx Archive File | 3.2 |
| .ASVX | Finale 2014 Auto-Saved Score | 3.3 |
| .ASW | ACDSee Slideshow Wizard File | 2.7 |
| .ASWCS | Avast Compressed Skin | 3.0 |
| .ASWS | Avast Skin | 2.2 |
| .ASX | Microsoft ASF Redirector File | 3.1 |
| .ASX | Alpha Five Library Temporary Index File | 2.1 |
| .ASY | LTspice Symbol File | 4.0 |
| .ASY | Asymptote Module | 2.9 |
| .AT3 | ATRAC3 Audio File | 3.6 |
| .AT5 | Lowrance Map File | 2.6 |
| .ATAHD | ATA Hard Drive Flag File | 3.3 |
| .ATC | AutoCAD Tool Catalog File | 4.0 |
| .ATE | Office Accounting Compressed Backup File | 3.8 |
| .ATF | Photoshop Transfer Function File | 3.0 |
| .ATF | Axon Text File | 4.3 |
| .ATF | Alternativa Texture File | 3.0 |
| .ATH | Alienware AlienFX Theme File | 3.0 |
| .ATI | Office Accounting Updated Company File | 3.7 |
| .ATI | Draw Cartoons 2 Character | 4.0 |
| .ATL | Artlantis 3D Scene File | 4.0 |
| .ATLAS | Atlas Generator File | 1.7 |
| .ATLAS | Texture Atlas Skin File | 2.9 |
| .ATM | PSP Game Audio File | 3.3 |
| .ATM | Vue Atmospheres File | 4.3 |
| .ATMX | Automation Anywhere Task | 3.5 |
| .ATN | Photoshop Actions File | 3.9 |
| .ATOM | Atom Syndication Format File | 2.6 |
| .ATOMSVC | Atom Service Document | 3.3 |
| .ATR | Atari Disk Image | 2.4 |
| .ATRAC | Sony ATRAC Audio File | 2.6 |
| .ATS | Advanced ETL Transformation Script | 2.7 |
| .ATSOFTS | LetEncrypt Encrypted File | 4.1 |
| .ATT | Alphacam Lathe Tool File | 2.4 |
| .ATT | Web Form Post Data File | 2.8 |
| .ATTHEME | Telegram Theme | 3.0 |
| .ATTR | iPhoto Attributes File | 1.7 |
| .ATX | Animation Master Plugin File | 2.0 |
| .ATX | ArcGIS Attribute Index File | 3.6 |
| .ATY | Association Type Placeholder | 3.5 |
| .ATZ | Atomic Time Zone File | 3.9 |
| .ATZ | Aston Compiled Theme | 4.0 |
| .AU | Sun Microsystems Audio File | 3.3 |
| .AU | Audacity Audio File | 3.8 |
| .AU3 | AutoIt v3 Script | 3.8 |
| .AUD | Westwood Studios Audio | 3.5 |
| .AUDIONOTE | AudioNote File | 2.9 |
| .AUP | Audacity Project File | 4.0 |
| .AUP3 | Audacity 3 Project File | 3.6 |
| .AUP3-SHM | Audacity 3 Temporary Project File | 4.0 |
| .AUP3-WAL | Audacity 3 Temporary Project File | 3.3 |
| .AUR | Aurora Timetable File | 1.5 |
| .AURORA | Aurora Ransomware Encrypted File | 3.0 |
| .AUT | AutoIt Script File | 2.5 |
| .AUTOMATICDESTINATIONS-MS | Windows Jump List File | 2.8 |
| .AUTOPLAY | AutoPlay Media Studio Project File | 3.6 |
| .AUTOSAVE | Fusion Auto-save File | 3.3 |
| .AUTOSAVE.CDP | Sony CD Architect Project Autosave File | 1.0 |
| .AUX | Auxiliary File | 3.5 |
| .AUX | LaTeX Auxiliary File | 4.3 |
| .AUZ | Ableton Authorization File | 4.0 |
| .AV | Final Draft AV Script | 3.6 |
| .AV | Video Surveillance File | 2.7 |
| .AV1 | AV1 Video | 3.8 |
| .AV3 | Arbitrator Video Surveillance File | 1.7 |
| .AVA | AvaaBook eBook | 3.0 |
| .AVASTLIC | Avast License File | 4.1 |
| .AVASTSOUNDS | Avast Soundpack File | 3.1 |
| .AVATAR | Google Talk Avatar File | 4.2 |
| .AVB | Avid Bin File | 3.5 |
| .AVB | Microsoft Comic Chat Character | 3.0 |
| .AVC | Kaspersky Virus Database | 2.4 |
| .AVC | Avid Media Composer Script | 2.0 |
| .AVCHD | High Definition Video File | 3.3 |
| .AVD | Movie Edit Pro Video Information File | 3.0 |
| .AVE | Avid User File | 3.0 |
| .AVE | Avigilon Native Video Export File | 3.4 |
| .AVENIRPROJ | StoryMill Project | 3.3 |
| .AVERY | Avery Design & Print Label File | 3.3 |
| .AVGDX | AVG Diagnostics File | 3.0 |
| .AVHD | Hyper-V SnapShot File | 3.9 |
| .AVHDX | Automatic Virtual Hard Drive File | 3.6 |
| .AVI | Audio Video Interleave File | 3.3 |
| .AVIADATA | AviaGames User ID File | 3.5 |
| .AVIF | AVIF Image | 3.2 |
| .AVIFS | AVIF Image Sequence | 3.5 |
| .AVJ | AntiVir Job File | 3.4 |
| .AVL | ArcView Legend File | 4.0 |
| .AVL | AntiVir Status Report File | 1.5 |
| .AVM | Anime Music Video | 2.3 |
| .AVP | Avid Project File | 3.0 |
| .AVP | AntiVir Profile | 2.0 |
| .AVR | Audio Visual Research File | 2.5 |
| .AVR | EverFocus Recording File | 2.1 |
| .AVRO | Avro Data File | 2.7 |
| .AVS | AviSynth Script | 2.2 |
| .AVS | Application Visualization System File | 3.0 |
| .AVS | AVS Preset File | 4.2 |
| .AVS | Adobe Photoshop Variations File | 2.0 |
| .AVS | Avid Project Preferences File | 3.7 |
| .AVS | AVS Workgroup of China Video | 2.0 |
| .AVV | Avid Volume Bin File | 3.5 |
| .AVX | ArcView Extension File | 3.6 |
| .AVX | Avid Plugin File | 4.0 |
| .AW | Answer Wizard File | 3.5 |
| .AW | Nintendo GameCube / Wii Soundbank | 3.7 |
| .AWB | AMR-WB Audio File | 1.4 |
| .AWB | ADX Audio Package File2 | 3.8 |
| .AWBR | WriteOnline WordBar File | 3.0 |
| .AWC | Emulex AWC Firmware Update File | 3.5 |
| .AWC | Audio Wave Container File | 3.5 |
| .AWCAV | ActiveWorlds Custom Avatar File | 2.5 |
| .AWD | Microsoft Fax Document | 3.7 |
| .AWD | Award BIOS Update File | 4.0 |
| .AWD | Artweaver Document | 3.3 |
| .AWDB | Access Walker Database File | 3.0 |
| .AWG | Activeworlds Object Group File | 1.7 |
| .AWG | Ability Draw Document | 2.5 |
| .AWK | AWK Script | 4.6 |
| .AWKW | Awkwords Word Generator File | 1.7 |
| .AWLIVE | Active Webcam Video File | 3.5 |
| .AWM | AllWebMenus Project File | 3.3 |
| .AWP | Ability Write Template | 2.5 |
| .AWS | AutoCAD Work Space File | 4.0 |
| .AWS | Ability Spreadsheet File | 2.3 |
| .AWT | AbiWord Template | 2.6 |
| .AWW | Ability Write Document | 3.7 |
| .AX | DirectShow Filter | 3.6 |
| .AXA | Annodex Audio File | 3.2 |
| .AXD | ASP.NET Web Handler File | 3.6 |
| .AXE | Annotated XML Example File | 3.0 |
| .AXE | AutoRoute Map File | 3.2 |
| .AXM | AXMEDIS Object | 2.5 |
| .AXM | FormIt Sketch | 4.5 |
| .AXP | CDBurnerXP Audio Compilation File | 3.0 |
| .AXP | Pinnacle Studio Movie Project | 2.5 |
| .AXR | Advanced Archive Password Recovery Project | 2.0 |
| .AXT | Adobe Photoshop Extract File | 3.1 |
| .AXT | Microsoft AutoRoute Template | 2.0 |
| .AXV | Annodex Video File | 2.5 |
| .AXX | AxCrypt Encrypted File | 4.0 |
| .AXX | Pinnacle Studio Project Package | 3.5 |
| .AY | AY Chiptune File | 2.0 |
| .AYT | Quran Content Archive | 3.0 |
| .AZ! | Vuze Partial Download File | 3.7 |
| .AZE | Amaze Encrypted File | 2.0 |
| .AZF | AirZip FileSECURE File | 1.5 |
| .AZS | AirZip FileSECURE File | 3.3 |
| .AZW | Amazon Kindle eBook File | 3.3 |
| .AZW1 | Amazon Topaz eBook | 2.7 |
| .AZW2 | Kindle Active Content App File | 3.7 |
| .AZW3 | Amazon KF8 eBook File | 3.8 |
| .AZW3F | Amazon eBook Metadata | 2.3 |
| .AZW3R | Amazon eBook Notation File | 1.3 |
| .AZW4 | Amazon Print Replica eBook | 2.9 |
| .AZZ | AZZ Cardfile Database File | 4.0 |
| .AZZX | Uncompressed AZZ Cardfile Data File | 3.3 |
All results listed.