| File extension | Developer/Producer | File description |
|---|---|---|
| A file extension | N/A | Unix Static Object Code Library Format |
| A$V file extension | Quark, Inc. | QuarkXpress Automatically Saved Project |
| A00 file extension | ESTsoft | Split Multi-volume ARJ Compressed File Archive (part 2) |
| A01 file extension | ESTsoft | Split Multi-volume ARJ Compressed File Archive (part 3) |
| A02 file extension | ESTsoft | Split Multi-volume ARJ Compressed File Archive (part 4) |
| A03 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 5) |
| A04 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 6) |
| A05 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 7) |
| A06 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 8) |
| A07 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 9) |
| A08 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 10) |
| A09 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 11) |
| A1 file extension | Free Pascal team | Free Pascal Archive |
| A10 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 12) |
| A11 file extension | AIM.com | AOL Instant Messenger Graphic |
| A12 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 14) |
| A13 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 15) |
| A14 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 16) |
| A15 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 17) |
| A16 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 18) |
| A17 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 19) |
| A18 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 20) |
| A19 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 21) |
| A1WISH file extension | RapidSolution Software | Audials Wishlist Format |
| A20 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 22) |
| A21 file extension | BSS Audio | Soundweb Firmware |
| A26 file extension | N/A | Atari 2600 ROM Image Format |
| A2A file extension | IBM | IBM Voice Type Languages Vocabels |
| A2B file extension | Adlib | Adlib Tracker II Instrument Bank |
| A2C file extension | Carnegie Mellon University | Alice Scene Format |
| A2DESKTOP file extension | Gladiators Software | Aston Desktop Desktop Skin |
| A2I file extension | Adlib | Adlib Tracker Instrument Format |
| A2L file extension | ASAM MCD-2MC | ASAP2 Description Format |
| A2M file extension | AdLib | AdLib Tracker 2 Format |
| A2MENU file extension | Gladiators Software | Aston Desktop Start Menu Skin |
| A2P file extension | Adlib | Adlib Tracker Pattern Format |
| A2PANEL file extension | Gladiators Software | Aston Desktop Panel Skin |
| A2R file extension | MyPlanetSoft.com | KittyXplorer Encrypted Archive |
| A2T file extension | Adlib | Adlib Tracker Tiny Module Format |
| A2THEME file extension | Gladiators Software | Aston 2 Theme Format |
| A2W file extension | Carnegie Mellon University | Alice Program World Format |
| A31 file extension | Adobe Systems Incorporated | Adobe Authorware Library |
| A32 file extension | ARJ Software, Inc. | Split Multi-volume ARJ Compressed File Archive (part 34) |
| A3D file extension | Eovia | Amapi 3D Modeling |
| A3G file extension | Pho.to | Photo! 3D Gallery |
| A3K file extension | N/A | Yamaha A3000 Sampler |
| A3L file extension | Adobe Systems | Adobe Authorware Library Format |
| A3M file extension | Adobe Systems | Adobe Authorware Unpackaged Format |
| A3P file extension | Carnegie Mellon University | Alice 3 Project |
| A3S file extension | N/A | Yamaha A3000 Sample |
| A3W file extension | Adobe Systems | Adobe Authorware Unpackaged Format |
| A3X file extension | FMC Technologies, Inc. | AccuLoad III.net Settings |
| A41 file extension | Adobe Systems Incorporated | Adobe Authorware Library |
| A4L file extension | Adobe Systems | Adobe Authorware Library Format |
| A4M file extension | Adobe Systems | Adobe Authorware Unpackaged Format |
| A4P file extension | Avanquest Software | A4Desk Pro Project Format |
| A4R file extension | N/A | Adobe Authorware Package Course |
| A4W file extension | Adobe Systems | Adobe Authorware Unpackaged Format |
| A51 file extension | Adobe Systems Incorporated | Adobe Authorware Library |
| A52 file extension | N/A | Atari 5200 Game Image Format |
| A5D file extension | N/A | Adobe Authorware Model |
| A5L file extension | Adobe Systems | Adobe Authorware Library Format |
| A5M file extension | N/A | Adobe Authorware Unpackaged |
| A5P file extension | N/A | Adobe Authorware Package Without Runtime |
| A5R file extension | Adobe Systems Incorporated | Adobe Authorware Packaged File Without Runtime |
| A5RPT file extension | Alpha Software, Inc. | Alpha Five Project Report |
| A5W file extension | Adobe Systems | Adobe Authorware Unpackaged Format |
| A5WCMP file extension | Alpha Software, Inc. | Alpha Five Web Publishing |
| A64 file extension | N/A | Artist 64 |
| A65 file extension | Adobe Systems | Adobe Authorware Library Format |
| A66 file extension | ARM Holdings plc | µVision Assembler Source |
| A6D file extension | N/A | Adobe Authorware Model |
| A6L file extension | N/A | Adobe Authorware Library |
| A6M file extension | N/A | Adobe Authorware Unpackaged |
| A6P file extension | Adobe Systems | Adobe Authorware Application Format |
| A6R file extension | N/A | Adobe Authorware Packaged File Without Runtime |
| A6W file extension | N/A | Adobe Authorware Unpackaged |
| A78 file extension | N/A | Atari 7800 Image |
| A7D file extension | Adobe Systems Incorporated | Adobe Authorware Model |
| A7E file extension | Adobe Systems Incorporated | Adobe Authorware Packaged Library |
| A7L file extension | N/A | Adobe Authorware Library |
| A7M file extension | N/A | Adobe Authorware Unpackaged |
| A7P file extension | Adobe Systems Incorporated | Adobe Authorware Packaged File Without Runtime |
| A7R file extension | Adobe Systems Incorporated | Adobe Authorware Packaged File Without Runtime |
| A7W file extension | N/A | Adobe Authorware Unpackaged |
| A86 file extension | Eric Isaacson Software | A86 Assembly Language Source Code |
| A8S file extension | Steven Glanville | Anim8or Script Format |
| AA file extension | Audible | Audible Audio Format |
| AA3 file extension | Sony | Sony ATRAC Audio Format |
| AAA file extension | Sybase Inc. | Sybase SQLAnywhere Temporary |
| AAB file extension | Adobe Systems Incorporated | Adobe Authorware Binary |
| AAC file extension | N/A | Advanced Audio Coding Format |
| AAD file extension | Amazon.com, Inc. | Audible Download Plugin |
| AAF file extension | Avid Technology | Advanced Authoring Format Multimedia Format |
| AAM file extension | Adobe Systems | Adobe Authorware Shocked Format |
| AAO file extension | US Army | Americas Army Map Format |
| AAP file extension | Heikki Ylinen | Apollo Advanced Playlist |
| AAPKG file extension | Invensys plc | ArchestrA IDE Package |
| AAR file extension | Apache Software Foundation | Apache Axis2 Archive |
| AAS file extension | Adobe Systems Incorporated | Adobe Authorware Shocked Packet |
| AAT file extension | Esri | ArcInfo Line Data |
| AATREND file extension | Invensys Systems, Inc. | ActiveFactory Trend |
| AAUI file extension | Adobe Systems | Adobe Acrobat UI Settings Format |
| AAW file extension | Lavasoft | Lavasoft Ad-Aware 2007 Settings |
| AAWDEF file extension | Lavasoft | Ad-Aware Definitions Format |
| AAX file extension | Audible | Audible Enhanced Audio Format |
| AB file extension | N/A | Applix Builder Format |
| AB$ file extension | Autodesk, Inc. | Autodesk AutoCAD Plot Spooling |
| AB1 file extension | N/A | DNA Electropherogram Format |
| AB2 file extension | Broderbund | |
| AB3 file extension | Ulead Systems | Photoimpact 3 Album Format |
| AB4 file extension | ENIAC Computing | AB4 Accounting & Business Data |
| AB6 file extension | AndersonBell Corp | ABStat Data |
| AB65 file extension | Adobe Systems Incorporated | Adobe PageMaker Document |
| AB8 file extension | AndersonBell Corp | ABStat Data |
| ABA file extension | Palm | Palm Address Book Archive Format |
| ABBU file extension | N/A | Apple Address Book Archive Format |
| ABC file extension | N/A | Musical Notation Language Format |
| ABCD file extension | AV Books Publishers | AudioVisual Book Data Format |
| ABCDDB file extension | Apple, Inc. | Apple Address Book Database |
| ABCDG file extension | Apple, Inc. | Apple AddessBook |
| ABCDMR file extension | Apple, Inc. | Apple Address Book Mail Recent |
| ABCDP file extension | Apple, Inc. | Address Book Card Data |
| ABD file extension | N/A | Text Adventure Authoring System |
| ABDATA file extension | Adobe Systems | Adobe Bridge Data Format |
| ABE file extension | N/A | Application Boundaries Enforcer |
| ABF file extension | Adobe Systems | Adobe Binary Screen Font Format |
| ABG file extension | Electronic Arts, Inc. | FIFA World Cup Game Data Beart |
| ABI file extension | N/A | Chromatogram Editor Format |
| ABICOLLAB file extension | The AbiSource Community | AbiWord Collaborative File Descriptor |
| ABK file extension | N/A | Ability Write Backup Format |
| ABKPRJ file extension | Ashampoo | Ashampoo Burning Studio Backup Project Format |
| ABL file extension | BOC Information Technologies Consulting AG | ADONIS Application Business Library |
| ABM file extension | N/A | Music Album Format |
| ABN file extension | Alpha Software, Inc. | Alpha Five |
| ABP file extension | AVS | AVS Barcode Profile |
| ABR file extension | Adobe Systems | Adobe Photoshop Brush Format |
| ABS file extension | ComponentAce | Absolute Database Single-file Database Format |
| ABT file extension | Advanced Business Technology Corporation | The Arbiter Game Schedule |
| ABU file extension | The Sage Group plc | ACT! E-mail Address Book |
| ABW file extension | AbiSource | AbiWord Document Format |
| ABX file extension | Corel Corporation | Corel WordPerfect Mail Address Book |
| ABY file extension | AOL | AOL Directory Format |
| ABZ file extension | Mark Mullin | AbszOrb 3D Interactive Game |
| AC file extension | N/A | GLPK Automake/autoconf Configure Definitions Format |
| AC$ file extension | Autodesk | AutoCAD Undo Info Format |
| AC0 file extension | National Instruments Corporation | SPICE AC/frequence Domain Output |
| AC1 file extension | National Instruments Corporation | SPICE AC/frequence Domain Output |
| AC2 file extension | National Instruments Corporation | SPICE AC/frequency Domain Output |
| AC3 file extension | N/A | Dolby Digital Sound Format |
| AC3D file extension | Inivis Limited | 3d Format Data |
| AC4 file extension | National Instruments Corporation | SPICE AC/frequence Domain Output |
| AC5 file extension | Wentai | ArtCut 5 Document Format |
| AC6 file extension | Wentai | Artcut Software Graphics Design Format |
| AC7 file extension | National Instruments Corporation | SPICE AC/frequence Domain Output |
| AC8 file extension | National Instruments Corporation | SPICE AC/frequence Domain Output |
| AC9 file extension | National Instruments Corporation | SPICE AC/frequence Domain Output |
| ACA file extension | Microsoft | Microsoft Agent Character Format |
| ACA2 file extension | FontLab Ltd. | Fontographer |
| ACAD file extension | Autodesk, Inc. | AutoCAD Database |
| ACB file extension | Adobe Systems | Adobe Color Book Format |
| ACBL file extension | Adobe Systems | Adobe Color Book Format |
| ACC file extension | FKJ Software | Graphic Accounts Account Data Format |
| ACCDA file extension | Microsoft | Microsoft Access 2007/2010 Add-in Format |
| ACCDB file extension | Microsoft | Microsoft Access 2007/2010 Database Format |
| ACCDC file extension | Microsoft | Microsoft Access 2007/2010 Digitally Signed Database Format |
| ACCDE file extension | Microsoft | Microsoft Access 2007/2010 Compiled Execute Only Format |
| ACCDP file extension | Microsoft Corporation | Microsoft Access 2007/2010 Project |
| ACCDR file extension | Microsoft | Microsoft Access 2007/2010 Runtime Mode Database Format |
| ACCDT file extension | Microsoft | Microsoft Access 2007/2010 Database Template Format |
| ACCDU file extension | Microsoft | Microsoft Access 2007/2010 Database Wizard Format |
| ACCDW file extension | Microsoft | Microsoft Access Link Format |
| ACCESS file extension | Oracle Corporation | Java Access Control |
| ACCESSOR file extension | Microsoft Corporation | Microsoft Visual Studio Accessor |
| ACCFL file extension | Microsoft Corporation | Microsoft Access Field Template |
| ACCFT file extension | Microsoft | Microsoft Access Template Format |
| ACCOUNTPICTURE-MS file extension | Microsoft | Microsoft Windows 8 Account Picture Format |
| ACCT file extension | IBM | IBM AIX System |
| ACD file extension | Sony | Sonic Foundry ACID Audio Format |
| ACD-BAK file extension | Sony | Sony ACID Project Backup Format |
| ACD-ZIP file extension | Sony | Sony ACID Compressed Project Format |
| ACE file extension | WinAce | WinACE Compressed Ace Archive Format |
| ACF file extension | Adobe Systems | Adobe Photoshop Custom Filter |
| ACFM file extension | Adobe Systems | Adobe Composite Font Metrics Format |
| ACG file extension | Microsoft | Microsoft Agent Preview Format |
| ACGD file extension | Johns Hopkins University | ACG System Predictive Model |
| ACGI file extension | N/A | ACGI Script (WWW) |
| ACGL file extension | Johns Hopkins University | ACG System Licence |
| ACH file extension | Rockwell Automation, Inc. | RSLogix 5 Project |
| ACI file extension | ACI | ACI Development Appraisal |
| ACK file extension | N/A | Swifty |
| ACL file extension | Microsoft | Microsoft Office Automatic Correction List |
| ACLOCK file extension | Amazing-Clock.com | Amazing Clock |
| ACM file extension | BioWare | ACM Compressed Sound Format |
| ACMD file extension | Zecos Software | Apache Commander Project |
| ACO file extension | Adobe Systems | Adobe Photoshop Color Palette And Swatches Format |
| ACORN file extension | Flying Meat | Acorn Draw Format |
| ACP file extension | Alfresco Software | Alfresco Exported Repository Format |
| ACQ file extension | GT Technologies | AcqURL Bookmark Manager |
| ACR file extension | Acr-Soft | ACRobot Script Format |
| ACROBATSECURITYSETTINGS file extension | Adobe Systems | Adobe Acrobat Security Settings Format |
| ACRODATA file extension | Adobe Systems | Adobe Acrobat Data Format |
| ACROPLUGIN file extension | Adobe Systems | Adobe Acrobat Plug-in Format |
| ACRS file extension | Adobe Systems Incorporated | Adobe Authorware |
| ACRYPT file extension | Tension Software | AutoCrypt Encrypted Document |
| ACS file extension | Microsoft | Microsoft Agent Character Structured Storage Format |
| ACS2 file extension | AIMP DevTeam | AIMP Media Player Skin |
| ACS3 file extension | AIMP DevTeam | AIMP Skin Package |
| ACSM file extension | Adobe Systems | Adobe Content Server Message Format |
| ACT file extension | N/A | ADPCM Compressed Audio Format |
| ACT! file extension | The Sage Group plc | Act! |
| ACTION file extension | Apple | Mac OS X Automator Action Format |
| ACTIONS file extension | Impressum | Photoline 4 Defaults |
| ACTIONSCRIPTPROPERTIES file extension | Adobe Systems Incorporated | Adobe Flex Settings |
| ACTIVITYDIAGRAM file extension | Microsoft Corporation | Microsoft Visual Studio Activity Diagram |
| ACTM file extension | Autodesk | Autodesk AutoCAD Action Macro Format |
| ACTPROJ file extension | Microsoft Corporation | Microsoft Visual Studio Visual SourceSafe ACT Project |
| ACTX file extension | Invisionsoft | DS Game Maker Action Description Format |
| ACU file extension | Micro Focus International plc | Machine Independent COBOL Object |
| ACV file extension | Adobe Systems | Adobe Photoshop Colour Curves Format |
| ACW file extension | Microsoft | Microsoft Accessibility Wizard Format |
| ACX file extension | Atari | Atari ST Program Format |
| AD file extension | Berkeley Systems | After Dark Screen Saver Format |
| AD1 file extension | AccessData Group, LLC. | Forensic Toolkit FTK Imager Image |
| AD3E file extension | Adobe Systems Incorporated | Adobe Dimensions Mac |
| AD65 file extension | Adobe Systems Incorporated | PageMaker 6.5 |
| ADA file extension | N/A | ADA Language Source Code Format |
| ADADOWNLOAD file extension | Adobe Systems | Adobe Download Assistant Partially Completed Download Format |
| ADB file extension | N/A | Ada Package Body Format |
| ADBA file extension | Raytheon Company | AIMSS Author Project Configuration |
| ADBLOCK file extension | Alpha Software, Inc. | Alpha Five Temporary |
| ADC file extension | Steffen Gutmann | Scanstudio 16 Colours Bitmap Graphics |
| ADCP file extension | Adobe Systems | Adobe Device Centra Project |
| ADD file extension | Microsoft | Microsoft Dynamics AX Developer Documentation Format |
| ADDIN file extension | Microsoft | Microsoft Visual Studio Addin Format |
| ADDON file extension | Zaplots | CFS Console Add-on Format |
| ADDR file extension | Ymir Entertainment Co., Ltd. | Metin2 Data |
| ADE file extension | N/A | Microsoft Access Compiled Project Format |
| ADF file extension | N/A | Amiga Disk Format |
| ADG file extension | Ableton AG | Ableton Live Device Group Format |
| ADH file extension | Amazon.com, Inc. | Audible Manager |
| ADI file extension | Active@ Data Recovery Software | Active@ Disk Image Format |
| ADIUMEMOTICON file extension | The Adium Team | Adium Dock Icon |
| ADIUMEMOTICONSET file extension | The Adium Team | Adium Emoticon Set |
| ADIUMHTMLLOG file extension | The Adium Team | Adium HTML Log |
| ADIUMICON file extension | The Adium Team | Adium Icon |
| ADIUMLIBPURPLEPLUGIN file extension | The Adium Team | Adium Lib Purple Plugin |
| ADIUMLISTLAYOUT file extension | The Adium Team | Adium List Layout |
| ADIUMLISTTHEME file extension | The Adium Team | Adium List Theme |
| ADIUMLOG file extension | The Adium Team | Adium Log |
| ADIUMMENUBARICONS file extension | The Adium Team | Adium Menu Bar Icon |
| ADIUMMESSAGESTYLE file extension | The Adium Team | Adium Message Style |
| ADIUMPLUGIN file extension | The Adium Team | Adium Plugin |
| ADIUMSCRIPTS file extension | The Adium Team | Adium AppleScripts |
| ADIUMSERVICEICONS file extension | The Adium Team | Adium Service Icons |
| ADIUMSOUNDSET file extension | The Adium Team | Adium Sound Set |
| ADIUMSTATUSICONS file extension | The Adium Team | Adium Status Icon |
| ADJ file extension | LISTECH | LISCAD Adjustment |
| ADJUSTMENTPRESETS file extension | Apple, Inc. | Apple Aperture Preset |
| ADK file extension | IBM | OS/2 Saved SKF Format |
| ADL file extension | Symantec Corporation | QEMM MicroChannel Adapter Description Library |
| ADLS file extension | openEHR | ADL Workbench |
| ADM file extension | N/A | Administrator Policy Template Format |
| ADML file extension | Microsoft | Microsoft Administrative Language-specific XML Template Format |
| ADMX file extension | Microsoft | Microsoft Administrative XML Template Format |
| ADN file extension | Microsoft | Microsoft Access Blank Project Template |
| ADO file extension | Adobe Systems | Adobe Photoshop Duotone Format |
| ADOBEBRIDGE file extension | Adobe Systems Incorporated | Adobe Bridge |
| ADOBENET file extension | Adobe Systems Incorporated | Adobe Production Studio |
| ADOC file extension | N/A | Authentica Secure Office Encoded Word Document |
| ADOS file extension | ADOS Corporation | Compound Document |
| ADOX file extension | ActivDox | ActivDox Document Format |
| ADP file extension | Microsoft | Microsoft Access Project Format |
| ADPP file extension | Adobe Systems | Adobe Device Central Package Profile |
| ADR file extension | N/A | Opera Bookmarks Format |
| ADRG file extension | Global Mapper Software LLC | ARC Digitized Raster Graphics |
| ADS file extension | N/A | Ada Package Specification |
| ADSK file extension | Autodesk, Inc. | Autodesk Exchange |
| ADSM file extension | Nikolas Ehrenberg | Advanced Split Machine Split |
| ADT file extension | Sage Software | ACT! Document Template Format |
| ADTG file extension | N/A | Advanced Data TableGram |
| ADTS file extension | N/A | Audio Data Transport Stream |
| ADU file extension | Addictive Software | Dictionary Format |
| ADV file extension | Nortek | Nortek Acoustic Doppler Velocimeter Format |
| ADVS file extension | Adobe Systems | Adobe Device Central Format |
| ADW file extension | Dr. K. Srinivasan | Tamil Transliterater/font Converter |
| ADX file extension | N/A | Approach Database Index Format |
| ADZ file extension | N/A | Amiga Emulator Compressed ADF Format |
| AD_ASM file extension | Alibre Inc. | Alibre Design CAD |
| AD_PRT file extension | Alibre Inc. | Alibre Design CAD |
| AE0 file extension | NetBSD Foundation, Inc. | NetBSD Ethernet Configuration |
| AE1 file extension | FileMaker, Inc. | FileMaker Pro Runtime Database |
| AEA file extension | Google AdWords Editor Archive Format | |
| AEB file extension | Planit Solutions Inc. | Alphacam Wire EDM VB Macro |
| AEC file extension | MAXON | Cinema 4D Adobe After Effects Import Composition Format |
| AED file extension | Planit Solutions Inc. | Alphacam Wire EDM Drawing |
| AEE file extension | ASUSTeK Computer Inc. | ASUS Data Security Manager Encoded |
| AEF file extension | ACERI, S. A. | ELECTRICAL Designer Related |
| AEH file extension | Visual Vision | IPer Advanced Embedded Hypertext |
| AEM file extension | Planit Solutions Inc. | Alphacam Wire EDM Parameter Macro |
| AEP file extension | Adobe Systems | Adobe After Effects Project Format |
| AEPKEY file extension | InterCrypto | Advanced Encryption Package Key Format |
| AEPX file extension | Adobe Systems | Adobe After Effects XML Project Format |
| AER file extension | Adobe Systems Incorporated | Adobe Atmosphere |
| AES file extension | Packetizer | AES Crypt Encrypted Format |
| AET file extension | Adobe Systems | Adobe After Effects Template Format |
| AETX file extension | Adobe Systems | Adobe After Effects Format |
| AEU file extension | Microsoft Corporation | Microsoft AutoRoute Express Europe Route |
| AEX file extension | Alpha Software | Greetings Card Format |
| AEXPK file extension | PGP Corporation | PGP Armored Extracted Public Key |
| AF file extension | Serif Europe Ltd. | 3DPlus Model |
| AF2 file extension | iGrafx | Micrografx FlowCharter 2.0 Flowchart Format |
| AF3 file extension | iGrafx | Micrografx FlowCharter Flowchart Format |
| AFA file extension | Fantiusen Software | Astrotite Compressed Data |
| AFB file extension | Planit Solutions Inc. | Alphacam Flame VB Macro |
| AFC file extension | Electronic Arts | Mass Effect Audio Format |
| AFD file extension | Planit | Alphacam Flame Drawing Format |
| AFE file extension | Avid Technology | Avid Media Metadata Format |
| AFF file extension | Basis Technology | Advanced Forensics Format Disk Image |
| AFG file extension | JHI Plant Bioinformatics Group | Tablet Assembly |
| AFL file extension | DeLorme | XMap Related |
| AFM file extension | N/A | Adobe Font Metrics Format |
| AFN file extension | Delcam plc | ArtCAM Font |
| AFO file extension | SoftPrime Development | Advanced File Organizer Catalog |
| AFO-XVID file extension | N/A | Compressed Video |
| AFP file extension | AndrosaSoft | FileProtector Encrypted Format |
| AFPLOC file extension | Apple | Apple Mac OS X Filing Protocol Location Format |
| AFPP file extension | N/A | Mac Apple Share |
| AFR file extension | N/A | FreeBSD |
| AFS file extension | Bentley Systems | STAAD.foundation Project Format |
| AFS3 file extension | Osborn Software | AFS 3 Basic Encrypted |
| AFT file extension | Ancestry.com | Family Tree Data Format |
| AFW file extension | iGrafx, LCC. | Micrografx FlowCharter Work Area |
| AFX file extension | Auto FX Software | Auto F/X Image Format |
| AFZ file extension | Ancestry.com Inc. | Family Tree Backup |
| AG file extension | IBM | Applix Graphics |
| AG4 file extension | Microsoft Corporation | Microsoft Access G4 |
| AGA file extension | Esri | ArcGIS ArcGlobe |
| AGB file extension | N/A | Game Boy Advance ROM |
| AGC file extension | John Bridges | Compiled Script |
| AGD file extension | AgileGraph | Agile Advantage Format |
| AGD1 file extension | Adobe Systems Incorporated | Adobe FreeHand For Mac Drawing |
| AGD2 file extension | Adobe Systems Incorporated | Adobe FreeHand 7 For Mac |
| AGDB file extension | ANSYS Inc. | ANSYS DesignSpace |
| AGE3REC file extension | Microsoft Studios | Age Of Empires III Recorded Game |
| AGE3SAV file extension | Microsoft Studios | Age Of Empires III Save Game |
| AGE3SCN file extension | Microsoft | Age Of Empires III Scenario Format |
| AGE3XREC file extension | Microsoft Studios | Age Of Empires III: The WarChiefs Recorded |
| AGE3XSAV file extension | Microsoft Studios | Age Of Empires III: The WarChiefs Save Game |
| AGE3XSCN file extension | Microsoft Studios | Age Of Empires III: The WarChiefs Scenario |
| AGE3YREC file extension | Microsoft Studios | Age Of Empires III: The Asian Dynasties Recorded Game |
| AGE3YSAV file extension | Microsoft Studios | Age Of Empires III: The Asian Dynasties Save Game |
| AGE3YSCN file extension | Microsoft Studios | Age Of Empires III: The Asian Dynasties Scenario |
| AGENT file extension | Forté Inc. | Forte Agent And FreeAgent Data |
| AGEO file extension | Dream Aquarium | Dream Aquarium Fish Model |
| AGF file extension | Esri | Atlas GIS Native Binary Geodataset |
| AGG file extension | BedRock Software Inc. | AggFlow Plant Flow Analysis |
| AGGR file extension | Adobe Systems | Adobe Captivate Aggregator Format |
| AGI file extension | Digium | Asterisk Gateway Interface Format |
| AGIF file extension | Image Tools Group | Active GIF Creator Project Format |
| AGILEKEYCHAIN file extension | AgileBits Inc. | 1Password Data |
| AGL file extension | Planaria Software LLC. | ArgusLab Molecular Graphics Modelling |
| AGLDEI file extension | Adobe Systems Incorporated | Adobe GoLive Template |
| AGLS file extension | Adobe Systems Incorporated | Adobe GoLive Snippet |
| AGLSL file extension | Adobe Systems Incorporated | Adobe GoLive Site |
| AGM file extension | DTS | DTS Multi-channel Pro Packer Format |
| AGMODULE file extension | Adobe Systems Incorporated | Adobe Lightroom Module |
| AGO file extension | Soft Machines | Autolog Script |
| AGP file extension | RL Vision | ArtGem Project Format |
| AGPREFS file extension | Adobe Systems Incorporated | Adobe Photoshop Lightroom Preferences |
| AGR file extension | Ableton | Ableton Live Groove Format |
| AGS file extension | John Bridges | AfterGRASP Script |
| AGTEMPLATE file extension | Adobe Systems Incorporated | Adobe Photoshop Lightroom Preset |
| AGTOOLKIT file extension | Adobe Systems Incorporated | Adobe Photoshop Lightroom |
| AGV file extension | Esri | ArcGlobe Video Metadata |
| AGW file extension | Aspen Research Group Ltd. | Aspen Graphics |
| AGWL file extension | Distributed and Parallel Systems - University of Innsbruck | Abstract Grid Workflow Language |
| AGX file extension | IBM | Rational XDE |
| AGX1 file extension | Adobe Systems Incorporated | Adobe FreeHand For Mac Extension |
| AGZ file extension | BedRock Software Inc. | AggFlow Aggregate Plant Flow Diagram |
| AH file extension | The FreeBSD Foundation | FreeBSD |
| AHB file extension | Cosby Clifton Computer Consultants Ltd | AIM High Briefcase Report |
| AHC file extension | Capcom Co., Ltd. | Resident Evil 4 |
| AHD file extension | Microsoft | Microsoft Dynamics AX On-line Help Data Format |
| AHF file extension | N/A | Aces High Film |
| AHI file extension | Microsoft | Microsoft Dynamics AX Online Help Index Format |
| AHK file extension | AutoHotkey | AutoHotkey Script Format |
| AHL file extension | eMule | EMule Metadata Format |
| AHOD file extension | Relic Entertainment Inc. | Homeworld |
| AHP file extension | Autodesk, Inc. | AutoCAD Help |
| AHS file extension | Adobe Systems | Adobe Photoshop Halftone Screens Format |
| AHTM file extension | N/A | HTML |
| AHTML file extension | N/A | HTML |
| AHU file extension | Adobe Systems | Adobe Photoshop Hue Saturation Lightness Format |
| AHX file extension | N/A | WinAHX Tracker Module Format |
| AI file extension | Adobe Systems | Adobe Illustrator Graphics Format |
| AI3 file extension | Adobe Systems Incorporated | Generic Encapsulated PostScript Graphic Format |
| AI4 file extension | Adobe Systems Incorporated | Generic Encapsulated PostScript Graphic |
| AI5 file extension | Adobe Systems Incorporated | Generic Encapsulated PostScript Graphic |
| AI6 file extension | Adobe Systems Incorporated | Generic Encapsulated PostScript Graphic |
| AI65 file extension | Adobe Systems Incorporated | Adobe PageMaker For Mac Extension |
| AI7 file extension | Adobe Systems Incorporated | Generic Encapsulated PostScript Graphic |
| AI8 file extension | Adobe Systems Incorporated | Generic Encapsulated PostScript Graphic Format |
| AIA file extension | Adobe Systems | Adobe Illustrator Action Format |
| AIC file extension | N/A | Advanced Image Coding Format |
| AID file extension | Activision | Star Trek Armada Arficicial Intelligence Parameters |
| AIDL file extension | Google Inc. | AIDL Interface |
| AIF file extension | Apple | Audio Interchange File Format Sound Format |
| AIFB file extension | Symbian | AIF Builder Project Format |
| AIFC file extension | N/A | Audio Interchange File Format Sound File With Compression |
| AIFF file extension | Apple | Audio Interchange File Format |
| AIFR file extension | N/A | Audio Interchange File Format |
| AIG file extension | MCS Investments, Inc. | Architecture Drawing |
| AIH file extension | Esri | Attribute Index |
| AIJ file extension | Oracle Corporation | Oracle After-Image Journal |
| AIL file extension | Mystik Media | AutoImager |
| AIM file extension | AOL | AOL Instant Message Launch Format |
| AIMPPL file extension | AIMP DevTeam | AIMP Media Player Playlist Format |
| AIN file extension | N/A | AIN Compressed File Archive |
| AIO file extension | N/A | Bitmap |
| AIP file extension | N/A | Adobe Illustrator Plugin Format |
| AIR file extension | Adobe Systems | Adobe AIR Rich Internet Applications |
| AIRAPPLICATION file extension | Adobe Systems Incorporated | Adobe AIR Application |
| AIRI file extension | Adobe Systems Incorporated | Adobe AIR Intermediate |
| AIRPORT file extension | Knife Edge Software | RealFlight Simulator |
| AIRPORTS file extension | Knife Edge Software | RealFlight Airports Data |
| AIS file extension | ACD Systems | ACDSee Album Image Sequence Format |
| AIT file extension | Adobe Systems | Adobe Illustrator Template Format |
| AIU file extension | Caphyon | Advanced Installer Updates Configuration Format |
| AIV file extension | EllaZ Systems | AIVault Data Format |
| AIW file extension | Sony Corporation | Formula One 2001 Game |
| AIX file extension | IBM | IBM AIX |
| AJA file extension | AJC Systems Ltd. | Backup Revision Control Archive |
| AJB file extension | Planit Solutions Inc. | Alphacam Water Jet VB Macro |
| AJD file extension | Planit Solutions Inc. | Alphacam Water Jet Drawing |
| AJG file extension | AJC Systems Ltd. | AJC Grep Project |
| AJL file extension | CA Technologies | CA ARCserve Backup Journal |
| AJM file extension | Planit Solutions Inc. | Alphacam Water Jet Parameter Macro |
| AJP file extension | N/A | AJP Player Video Format |
| AKAI file extension | N/A | Akai S-series Floppy Disk Image |
| AKF file extension | Adobe Systems Incorporated | Adobe Acrobat Key |
| AKM file extension | Srinivas Annam | Aksharamala Keymap Binary |
| AKP file extension | N/A | Akai S5000, S6000 Program Format |
| AKS file extension | Srinivas Annam | Aksharamala Keymap Binary |
| AKT file extension | Srinivas Annam | Aksharamala Keymap Source |
| AKW file extension | Adobe Systems Incorporated | Adobe RoboHelp Help Project Index Designer |
| AL file extension | N/A | A-Law Compressed Sound Format |
| AL3 file extension | ACORD | Electronic Data Interchange |
| AL8 file extension | SWGSoft Inc. | AAA Logo Project |
| ALA file extension | Michael Arnaud | Alan Interactive Fiction Language |
| ALAC file extension | Apple | ALAC Encoded Audio Format |
| ALARMZ file extension | Francis Gagné | Alarmz Alarm |
| ALAW file extension | N/A | A-law G.711 European Telephony Format |
| ALB file extension | Alpha Software | Alpha Five Data Dictionary |
| ALB3 file extension | Adobe Systems Incorporated | Adobe PageMaker Document |
| ALB4 file extension | Adobe Systems Incorporated | Adobe PageMaker For Mac Document |
| ALB5 file extension | Adobe Systems Incorporated | Adobe PageMaker 5 Document |
| ALB6 file extension | Adobe Systems Incorporated | Adobe PageMaker For Mac |
| ALBM file extension | HP | Photo Album Format |
| ALBUM file extension | N/A | Thumbnail Cache |
| ALC file extension | Microsoft | Microsoft Dynamics AX Label Description Format |
| ALC4 file extension | Adobe Systems Incorporated | Adobe PageMaker For Mac Dictionary |
| ALCO file extension | Alco Blom | URL Manager Pro |
| ALD file extension | Microsoft | Microsoft Dynamics AX Application Label Data Format |
| ALD2 file extension | Adobe Systems Incorporated | Adobe Pagemaker For Mac |
| ALD3 file extension | Adobe Systems Incorporated | Adobe PageMaker 3 For Mac |
| ALD4 file extension | Adobe Systems Incorporated | Adobe Pagemaker 4 For Mac |
| ALD5 file extension | Adobe Systems Incorporated | Adobe Pagemaker 6 For Mac |
| ALD6 file extension | Adobe Systems Incorporated | Adobe PageMaker 6 For Mac |
| ALDF file extension | Stichting Aldfaer | Aldefaer Data |
| ALE file extension | Avid Technology | Avid Log File Format |
| ALF file extension | The Sage Group | ACT! Lookup Format |
| ALF6 file extension | Adobe Systems Incorporated | PageMaker Default |
| ALG file extension | ERDAS, Inc. | ER Mapper Algorithm |
| ALH5 file extension | Adobe Systems Incorporated | Adobe PageMaker Add-in |
| ALI file extension | Microsoft | Microsoft Dynamics AX Label Index Format |
| ALIAS file extension | N/A | Alias Image |
| ALIASES file extension | National Instruments Corporation | LabVIEW IP Adresses Map |
| ALL file extension | Steinberg | Cubasis Project Format |
| ALLOW file extension | Various Linux developers | Linux Access |
| ALM file extension | Alpha Software, Inc. | Alpha Five Database Information |
| ALMB file extension | N/A | Mac OS 8.1 Action Module Data |
| ALMN file extension | Apple, Inc. | Location Manager Module |
| ALN file extension | UltraTech Group | LexNavigator Database Update |
| ALO file extension | LucasArts Entertainment Company, LLC | Star Wars: Empire At War Game |
| ALP file extension | Ableton | Ableton Live Pack Format |
| ALR file extension | Campbell Wild | ADRIFT Language Resource Format |
| ALS file extension | Ableton | Ableton Live Project Format |
| ALT file extension | Microsoft | Microsoft Dynamics AX Temporary Format |
| ALT3 file extension | Adobe Systems Incorporated | Adobe PageMaker Template |
| ALT4 file extension | Adobe Systems Incorporated | Adobe Pagemaker For Mac |
| ALT5 file extension | N/A | Adobe Pagemaker 5 For Mac Document |
| ALT6 file extension | Adobe Systems Incorporated | Adobe PageMaker 6 |
| ALTH file extension | Excel Software | QuickHelp For Mac |
| ALTP file extension | Excel Software | QuickHelp |
| ALTQ file extension | N/A | QuickView Settings |
| ALTV file extension | N/A | QuickView Help |
| ALV file extension | Adobe Systems | Adobe Photoshop Levels Format |
| ALW file extension | N/A | A-law G.711 European Telephony Format |
| ALX file extension | Microsoft | Internet Script Language Defines 2-D Layout ActiveX Layout Format |
| ALY file extension | The Sage Group plc | Sage ACT! |
| ALZ file extension | ESTsoft | ALZip Compressed Format |
| AM file extension | Automake | GLPK Automake/autoconf Makefile Definitions Format |
| AM1 file extension | The Adventure Maker Team | Adventure Maker Project Format |
| AM2 file extension | Indigo Rose Corporation | AutoPlay Menu Studio Ver.2 Data |
| AM3 file extension | Indigo Rose Corporation | AutoPlay Menu Studio Ver.3 Data |
| AM4 file extension | Indigo Rose | AutoPlay Menu Studio Version 4 Project Format |
| AM5 file extension | Indigo Rose | AutoPlay Menu Studio Ver.5 Data Format |
| AM6 file extension | Indigo Rose | AutoPlay Menu Studio Ver.6 Data Format |
| AM7 file extension | Indigo Rose | AutoPlay Menu Studio Ver.7 Data Format |
| AMA file extension | Electronic Arts, Inc. | Fifa2000 Feart |
| AMAYA file extension | W3C | Amaya |
| AMB file extension | Paragon Decision Technology | AIMMS Model Format |
| AMC file extension | N/A | Ant Movie Catalog Format |
| AMD file extension | Planit Solutions Inc. | Alphacam 3D Mill, 2D Mill Drawing |
| AME file extension | The Sage Group plc | ACT! E-mail System Library |
| AMF file extension | N/A | DSMIA/Asylum Module Music Format |
| AMFM file extension | Adobe Systems | Adobe Multiple Font Metrics Format |
| AMI file extension | N/A | Amica Paint |
| AMIPRO file extension | N/A | Ami Pro Table Structure |
| AMJ file extension | MechCAD | AceMoney |
| AMK file extension | MechCAD | AceMoney Backup |
| AML file extension | Microsoft | Microsoft Assistance Markup Language |
| AMM file extension | Bolide Software | All My Movies Film Database Format |
| AMO file extension | AOL Inc. | AIM AOL Instant Messenger UI Extension |
| AMODEL file extension | KAISHA-Tec Co. Ltd | ActiveModeler Project |
| AMOS file extension | IBM | AMOS Basic Code |
| AMP file extension | Adobe Systems | Adobe Photoshop Arbitrary Map Settings Format |
| AMR file extension | N/A | Adaptive Multi-Rate Compressed Audio Format |
| AMS file extension | N/A | Adobe Monitor Setup Format |
| AMSM file extension | AtomPark Software Inc. | Atomic Mail Sender Project |
| AMSORM file extension | Xcira | OnLine Ringman Format |
| AMST file extension | AtomPark Software Inc. | Atomic Mail Sender Template |
| AMT file extension | N/A | Abbyy Finereader 5.0 Pro |
| AMT50 file extension | N/A | BERNINA V5.0 Embroidery Software Template |
| AMT60 file extension | N/A | BERNINA V6.0 Embroidery Software Template |
| AMU file extension | Sony | Sony PictureGear Studio Photo Album Format |
| AMV file extension | N/A | AMV Video File Format |
| AMW file extension | Alcorn McBride, Inc. | Alcorn McBride Show Controller |
| AMX file extension | Adobe Systems | Adobe Motion Exchange Format |
| AMXD file extension | Ableton | Max For Live Project Format |
| AMXX file extension | N/A | AMX Mod X Plug-in Format |
| AMZ file extension | Amazon | Amazon MP3 Downloader Format |
| AN file extension | Adobe Systems | Adobe Edge Animate Project Format |
| AN1 file extension | DeLorme | DeLorme Street Atlas Drawing Format |
| AN2 file extension | Argonaut Software | Croc Animation Format |
| AN8 file extension | Steven Glanville | Anim8or 3D Animation Format |
| ANA file extension | Cuylaerts Engineering | Analysis For Windows |
| ANAT file extension | N/A | XNBC Network Anatomy |
| ANC file extension | Planit Solutions Inc. | Alphacam NC Program |
| ANDROID file extension | N/A | Readme |
| ANE file extension | Adobe Systems | Adobe AIR Native Extension Format |
| ANF file extension | ANSYS Inc. | ANSYS DesignModeler |
| ANG file extension | TSS-Transport Simulation Systems | AIMSUN NG Related |
| ANH file extension | Birch Grove Software, Inc. | ActivTrak Net View History |
| ANI file extension | Microsoft | Animated Cursor |
| ANIM file extension | Autodesk | Autodesk Maya Animation Format |
| ANIMSET file extension | OC3 Entertainment | FaceFX Animation Set Format |
| ANIMSET_INGAME file extension | OC3 Entertainment | FaceFX In-Game Animation Set Format |
| ANISO file extension | Chemical Crystallography Laboratory, Oxford | Chemical Crystallography |
| ANJUTA file extension | The GNOME Project | Anjuta DevStudio Project Format |
| ANKI file extension | Damien Elmes | Anki Deck |
| ANL file extension | Aivosto Oy | Project Analyzer Saved Analysis |
| ANM file extension | N/A | 3D Animation Format |
| ANME file extension | Smith Micro | Anime Studio Project Format |
| ANN file extension | N/A | Microsoft Windows Help Annotation Format |
| ANNOT file extension | Adobe Systems | Adobe Digital Editions Annotations Format |
| ANR file extension | DeLorme | DeLorme Street Atlas Route |
| ANS file extension | N/A | ANSI Text File (ANSI Art) |
| ANSR file extension | DTLink LLC | AnswerTool Answer Document |
| ANSYM file extension | Adobe Systems | Adobe Edge Animate Library Format |
| ANT file extension | SFR GmbH | CalcAnt Saved Calculation |
| ANTIFRAG file extension | N/A | DC++ Incomplete Download |
| ANTISPAM5 file extension | Intego | Personal AntiSpam Settings Format |
| ANTMPL file extension | Adobe Systems Incorporated | Adobe Edge Animate Template |
| ANV file extension | N/A | AirNav Image |
| ANX file extension | HotDocs | HotDocs Answer Format |
| ANY file extension | DRail Modelspoor | AnyRail Layout Plan Format |
| ANYDVDHD file extension | SlySoft | AnyDVD Registration Key |
| AO file extension | Green Parrots Software | ActionOutline Data |
| AOB file extension | N/A | DVD Audio Object Format |
| AOD file extension | Microsoft | Microsoft Dynamics AX Object Data Format |
| AOF file extension | Abvent Group | Artlantis Object Format |
| AOI file extension | Microsoft | Microsoft Dynamics AX Application Object Index Format |
| AOIS file extension | Zaplots | CFS Console Add-on Installer Settings Format |
| AOL file extension | AOL | America On-line Related Format |
| AOM file extension | Adobe Systems | Adobe After Effects Output Settings Format |
| AOP file extension | Red Hat, Inc. | JBoss AS JAR Archive |
| AOS file extension | ARCHOS | Archos Signed Encrypted Data Format |
| AOT file extension | N/A | ZenWorks SnAppShot Application Binary Object Template |
| AP file extension | Fifth Generation Systems | Fifth Generation Systems Active Page Format |
| AP0 file extension | Microsoft Corporation | Microsoft Windows APW_data |
| AP2 file extension | Promethean World plc | ActivInspire Resource Pack |
| AP3 file extension | Asprova Corporation | Asprova Project |
| AP? file extension | Terry A. Davis | LoseThos C+ Source |
| APA file extension | Rockwell Automation | RSView Application Manager Archive |
| APALBUM file extension | Apple | Apple Aperture Album Format |
| APB file extension | Planit Solutions Inc. | Alphacam Punch VB Macro |
| APC file extension | IBM | Lotus Printer Driver Characters |
| APCDOC file extension | Ashampoo GmbH & Co. KG | Ashampoo Photo Commander |
| APD file extension | ACD Systems | ACDSee Photo Document |
| APDB file extension | Apple, Inc. | Apple Aperture Library |
| APDETECTED file extension | Apple, Inc. | Apple IPhoto |
| APDISK file extension | Apple, Inc. | Apple Mac OS X Related |
| APE file extension | Monkey's Audio | Monkeys Audio Lossless Audio Compression Format |
| APERTUREEDIT file extension | Apple, Inc. | Apple Aperture |
| APERTUREEXPORT file extension | Apple, Inc. | Apple Aperture |
| APEX file extension | N/A | AVM Sample Studio Bank |
| APF file extension | Adobe Systems | Adobe Acrobat Profile Format |
| APFACENAME file extension | Apple, Inc. | Apple IPhoto Face Data |
| APG file extension | N/A | APGen Script |
| APH file extension | Ability Plus Software | Ability Photoalbum Album Database Format |
| API file extension | Adobe Systems | Adobe Acrobat Plugin Format |
| APIN file extension | Adobe Systems Incorporated | Adobe InDesign Import/export Filter |
| API_FILTERS file extension | The Eclipse Foundation | Eclipse API Settings |
| APJ file extension | Autodesk, Inc. | AutoCAD Project |
| APK file extension | Google Android Package Format | |
| APL file extension | ACD Systems | ACDSee Plug-in Format |
| APLG file extension | RapidSolution Software | Audials One Add-on Format |
| APLIBRARY file extension | Apple | Aperture Pictures Library Database Format |
| APLMODEL file extension | Apple, Inc. | Apple ICal |
| APLN file extension | Adobe Systems Incorporated | Adobe InDesign 3rd Party Extension |
| APLP file extension | RapidSolution Software | Audials One Add-on Installation Package Format |
| APLT file extension | Apple, Inc. | Mac OS X AppleScript Applet |
| APM file extension | Adobe Systems | Aldus Placeable Metafile |
| APNG file extension | N/A | Animated Portable Network Graphics Format |
| APNX file extension | Amazon | Amazon Kindle Index Format |
| APO file extension | Abacre Limited | Abacre Paperless Office |
| APP file extension | Apple | MAC Application Package Or Core System Service Format |
| APP-SE file extension | N/A | Sony Ericsson XPERIA X10 |
| APPCACHE file extension | N/A | HTML5 Cache Manifest |
| APPDATA file extension | VMware, Inc. | VMware Cache |
| APPDOWNLOAD file extension | Apple | Mac OS X App Store Incomplete Download Format |
| APPICON file extension | VMware, Inc. | VMWare Cache |
| APPLE file extension | N/A | Apple AppleSingle Data |
| APPLEDOUBLE file extension | Apple, Inc. | Apple AppleDouble Resource |
| APPLESCRIPT file extension | Apple | AppleScript Script Format |
| APPLESYNCINFO file extension | Apple, Inc. | IOS |
| APPLET file extension | Eclipse | Eclipse IDE For Java Developers Format |
| APPLETVIEWER file extension | Oracle Corporation | Java Appletviewer |
| APPLE_PARTITION_MAP file extension | Apple, Inc. | Apple Partition Scheme |
| APPLICATION file extension | Microsoft | ClickOnce Deployment Manifest Format |
| APPREF-MS file extension | Microsoft | Application Reference Format |
| APPUP file extension | Erlang | Erlang Application Upgrade Format |
| APPV file extension | Microsoft Corporation | App-V Archive |
| APPX file extension | Microsoft | Microsoft AppX Application Package Format |
| APPXMANIFEST file extension | N/A | Windows Store App Source Manifest |
| APPXSYM file extension | Microsoft | Microsoft Visual Studio Windows 8 Application Information Format |
| APPXUPLOAD file extension | Microsoft | Microsoft Visual Studio Windows 8 Application Upload Format |
| APR file extension | ESRI | ArcView Project Format |
| APREF-MS file extension | Microsoft Corporation | Application Reference |
| APRJ file extension | Zecos Software | ApacheConf Project |
| APS file extension | Microsoft | Microsoft Visual C++ Binary Version Of Resource Format |
| APSMARTALBUM file extension | Apple, Inc. | Apple Aperture |
| APT file extension | N/A | Almost Plain Text Format |
| APU file extension | Audacity | Audacity Audio |
| APV file extension | Dexadine, Inc. | Acerose Password |
| APVAULT file extension | Apple, Inc. | Apple Aperture Vault |
| APW file extension | RomanLab Co. Ltd. | Password |
| APX file extension | Ability Plus Software | Ability Photopaint Image Format |
| APXL file extension | Apple | Apple Keynote Presentation XML Document Settings Format |
| APXT file extension | Apperson Education Products | DataLink Setting |
| APZ file extension | Indigo Rose | AMS Shared Project Format |
| AP_ file extension | Google Android Development Resources Package Format | |
| AQ file extension | Incline Software, LC | Ancestral Quest Genealogy |
| AQ1 file extension | RJ Software | AptiQuiz Test |
| AQA file extension | RJ Software | AptiQuiz Result |
| AQC file extension | Schlumberger Limited | AquaChem Database |
| AQF file extension | Liquid Development, LLP | Aquifer-Generated Web Page |
| AQL file extension | N/A | AOL DLL |
| AQM file extension | MOBAC | AlpineQuest GPS Hiking Map Format |
| AQP file extension | Articulate Global, Inc. | Quizmaker 08 And Older Quiz |
| AQQ file extension | AQQ Sp. z o.o. | AQQ Extension |
| AQT file extension | N/A | AQTitle Subtitles Format |
| AQZ file extension | N/A | Amateur Radio Questionary Data |
| AR file extension | N/A | Linux/Unix Command Library Format |
| AR-WMP file extension | Rainer Goebel | BrainVoyager QX Anatomical-resolution Volume Map |
| ARA file extension | LittleApps | Archivaldo Resource Archive |
| ARB file extension | Planit Solutions Inc. | Alphacam Router VB Macro |
| ARBVP1 file extension | Google Inc. | Google Earth Shader |
| ARC file extension | Nokia | FreeArc Compressed Format |
| ARCH00 file extension | Sierra | F.E.A.R. Game Archive Format |
| ARCH01 file extension | Monolith Productions, Inc. | F.E.A.R. 2 Game |
| ARCHCFG file extension | Monolith Productions, Inc. | F.E.A.R. 2 Project Origin Configuration |
| ARCHITECT file extension | BSS Audio | Soundweb London Design |
| ARCHIVER file extension | Incredible Bee | Incredible Bee Archiver Archive |
| ARCINFO file extension | Esri | ArcInfo Info |
| ARCUT file extension | Adobe Systems | Adobe Prelude Rough Cut Format |
| ARD file extension | Esko | ArtiosCAD Workspace Format |
| ARE file extension | BioWare | BioWare Aurora Engine Area |
| ARENA file extension | id Software | Quake 3 Id Tech 3 Game Engine Arena Settings Format |
| ARF file extension | WebEx Communicatons | WebEx Advanced Recording Format |
| ARFF file extension | University of Waikato | Weka Attribute-relation Format |
| ARG file extension | Autodesk | AutoCAD Profile Export Format |
| ARGO file extension | Tigris.org | ArgoUML Project |
| ARH file extension | Siemens | Siemens ProTool Compressed Project Format |
| ARI file extension | N/A | ARI Compressed File Archive |
| ARIA file extension | Plogue | Chipsounds Audio Format |
| ARIAX file extension | Plogue | Chipsounds XML Sound Format |
| ARJ file extension | ARJ Software | ARJ Compressed Archive Format |
| ARK file extension | ARK11 | ARC File Archiver CPM/Port Archive Format |
| ARL file extension | AOL | AOL Organizer Format |
| ARLC file extension | Eidos Interactive Ltd. | Commandos 2 Men Of Courage Game |
| ARM file extension | Silicon Realms Toolworks | SoftwarePassport Protection System |
| ARMA2OAPROFILE file extension | Bohemia Interactive | ArmA 2 Settings |
| ARMA2PROFILE file extension | Bohemia Interactive | ARMA2 Profile |
| ARMX file extension | Microsoft Corporation | ASP.NET Source |
| ARMY file extension | Microsoft Studios | Impossible Creatures Collection Of Created Creatures |
| ARN file extension | N/A | Astronomical Research Network Image Format |
| ARO file extension | Tomahawk Technologies | SteelArrow Script Format |
| ARP file extension | Elcomsoft | Advanced RAR Password Recovery Preference Format |
| ARPACK file extension | Ambient Design | ArtRage Package |
| ARPI file extension | N/A | Adobe Extension |
| ARQ file extension | BMC Software, Inc. | BSM Action Request System Client Macro |
| ARR file extension | Elcomsoft | Advanced RAR Password Recovery Project Format |
| ARS file extension | Adobe Systems | Adobe After Effects Render Settings Format |
| ARSC file extension | Google Android Resource Format | |
| ARSCRIPT file extension | Ambient Design | ArtRage Script |
| ART file extension | AOL | Various Graphic Formats |
| ART42 file extension | N/A | V1.x Explorations Projects |
| ART50 file extension | BERNINA International AG | BERNINA V5.0 Embroidery Software Designs |
| ART6 file extension | Articulate Global, Inc. | Articulate Presenter Compressed |
| ART60 file extension | BERNINA International AG | BERNINA V6.0 Embroidery Software Designs |
| ARTB file extension | Mapdiva | Artboard Vector Drawing Format |
| ARTF file extension | Adobe Systems Incorporated | Adobe FreeHand Xtra |
| ARTPROJ file extension | Versioned | Artifacts Project Format |
| ARTWORK file extension | DrawingHand | ArtStudio Image Format |
| ARTX file extension | Extensoft, Inc. | Artisteer Project |
| ARTZ file extension | Adobe Systems Incorporated | Adobe Illustrator For Mac |
| ARU file extension | N/A | Autorun.aru Malicious |
| ARV file extension | Microsoft Corporation | Microsoft AutoRoute User Information |
| ARW file extension | Sony | Sony Digital Camera RAW Image Format |
| ARX file extension | Autodesk | AutoCAD Runtime Extension Format |
| ARXML file extension | N/A | AUTOSAR XML |
| ARY file extension | Hewlett-Packard Company | SmartStart Scripting Toolkit |
| ARZ file extension | THQ | Titan Quest Game Database |
| AS file extension | Adobe Systems | Adobe Flash ActionScript Document |
| AS$ file extension | Microsoft Corporation | Microsoft Word Temporary |
| AS2 file extension | Promethean World plc | ACTIVstudio Resource |
| AS2PROJ file extension | FlashDevelop | FlashDevelop Project Format |
| AS3A file extension | Promethean World plc | ActivInspire Resource |
| AS3PROJ file extension | FlashDevelop | FlashDevelop ActionScript 3 Project Format |
| AS4 file extension | askSam Systems | AskSam Backup Format |
| AS4A file extension | Promethean World plc | ActivInspire Resource Pack |
| AS? file extension | Terry A. Davis | LoseThos Assembly Source |
| ASA file extension | N/A | Active Server Configuration Format |
| ASAT file extension | N/A | Assemble SAT 3D Model Format |
| ASAX file extension | Microsoft | ASP.NET Application Optional Source Format |
| ASB file extension | Planit | Alphacam Stone VB Macro Format |
| ASBX file extension | Microsoft Corporation | Microsoft ASP.Net BridgeHandler |
| ASC file extension | Adobe Systems | ActionScript Format |
| ASCM file extension | Adobe Systems Incorporated | Adobe Content Server Message |
| ASCS file extension | Adobe Systems | ActionScript Communication Server Format |
| ASCX file extension | Microsoft | Active Server Pages Web User Control Format |
| ASD file extension | Microsoft | Microsoft Word Auto-save Document Format |
| ASDB file extension | Afterwarp Development | Asphyre Sphinx Archive |
| ASDVDCRTPROJ file extension | Aimersoft Studio | Aimersoft DVD Creator Project |
| ASE file extension | Adobe Systems | Adobe Swatch Exchange Format |
| ASEC file extension | Google Android Encrypted Application Package Format | |
| ASEF file extension | Adobe Systems Incorporated | Adobe Swatch Exchange |
| ASEP file extension | Milk Farm Software, ltd. | Separator For Mac |
| ASF file extension | Microsoft | Advanced Systems (streaming) Format |
| ASG file extension | Global Star Software | Airport Tycoon Saved Game |
| ASGP file extension | Hewlett-Packard Company | HP-UX NIS Maps Configuration |
| ASH file extension | Audiosurf | Audiosurf Audio Metadata Format |
| ASHBAK file extension | Ashampoo | Ashampoo Burning Studio Backup Archive Format |
| ASHDISC file extension | Ashampoo | Ashampoo Disk Image Format |
| ASHLANG file extension | Ashampoo GmbH & Co. KG | Ashampoo Media Player+ |
| ASHPRJ file extension | Ashampoo | Ashampoo Burning Studio Project Format |
| ASHX file extension | Microsoft | ASP.NET Web Handler Format |
| ASI file extension | Alpha Software | Alpha Five Storage Format |
| ASIC file extension | N/A | ASIC Source |
| ASIS file extension | Apache Software Foundation | Apache As Is |
| ASK file extension | N/A | AskSam Database Format |
| ASL file extension | N/A | Adobe Photoshop Layer Style Format |
| ASM file extension | N/A | Assembler Source Code Format |
| ASMDOT file extension | SolidWorks Corporation | SolidWorks Assembly Template |
| ASMPRP file extension | SolidWorks Corporation | SolidWorks Assembly Custom Properties Tab Template |
| ASMX file extension | Microsoft | Active Server Plus Web Services Source Format |
| ASN file extension | IGN Entertainment, Inc. | GameSpy Arcade Skin |
| ASND file extension | Adobe Systems | Adobe Soundbooth Sound Document Format |
| ASO file extension | Adobe Systems Incorporated | Adobe Flash Cache |
| ASP file extension | Microsoft | Active Server Page Script Page |
| ASP+ file extension | Microsoft Corporation | ASP.NET ASP+ |
| ASPR file extension | ASPACK SOFTWARE | ASProtect Related |
| ASPROJ file extension | Microsoft Corporation | Microsoft Visual Studio Analysis Services Project |
| ASPX file extension | Microsoft | Active Server Page Extended ASP.NET Script Format |
| ASR file extension | Adobe Systems | Adobe Flash ActionScript Remote Format |
| ASRP file extension | N/A | Arc Standard Raster Product |
| ASS file extension | N/A | Advanced SubStation Alpha Subtitle Format |
| ASSET file extension | Unity Technologies | Unity Asset Format |
| ASSISTANT file extension | Hewlett-Packard Company | HP Printer Utility For Mac Assistant Plugin |
| ASSOC file extension | Spearit Software, Inc. | Associate This Association Database |
| ASSTRM file extension | Ubisoft Entertainment S.A. | Splinter Cell Blacklist Game Data |
| AST file extension | Adobe Systems | Adobe Photoshop Colour Separation Table |
| AST2 file extension | Fantiusen Software | Astrotite |
| ASTX file extension | Adobe Systems Incorporated | Adobe Story Exported Script |
| ASU file extension | SumTotal Systems, Inc. | ToolBook Package Definition |
| ASV file extension | Adobe Systems | Adobe Photoshop Selective Colour Format |
| ASVF file extension | Afterwarp Development | Asphyre Sphinx Archive |
| ASW file extension | ACD Systems | ACDSee Slideshow Wizard Format |
| ASWCS file extension | AVAST Software | Avast! Antivirus Skin |
| ASWS file extension | AVAST Software | Avast! Antivirus Skin |
| ASX file extension | Microsoft | Microsoft Advanced Streaming Redirector Format |
| ASXML file extension | N/A | XML Music Playlist |
| ASY file extension | Asymptote | Asymptote Module |
| ASZ file extension | Terry A. Davis | LoseThos Assembly Source |
| AS_ file extension | Microsoft Corporation | Winhelp Compressed |
| AT3 file extension | Sony | Airport Tycoon 3 Saved Game |
| AT5 file extension | Lowrance | Lowrance Chart Format |
| AT65 file extension | Adobe Systems Incorporated | Adobe Pagemaker For Mac |
| ATA file extension | Julian Spencer | Antenna Project |
| ATAHD file extension | Puppy Linux | Puppy Linux ATA Hard Drive Flag Format |
| ATAK file extension | N/A | Soundscape Audio-Take |
| ATB file extension | Anet | AnetHelp Tools |
| ATC file extension | Autodesk | AutoCAD Catalog Format |
| ATD file extension | Microsoft Corporation | Microsoft Systems Management Server |
| ATE file extension | Microsoft | Microsoft Office Accounting Compressed Backup Format |
| ATF file extension | Adobe Systems | Adobe Photoshop Transfer Function Format |
| ATH file extension | Dell | Alphacam Lathe Thread Format |
| ATHEME file extension | Amazing-Clock.com | Amazing Clock Theme |
| ATI file extension | Microsoft | Microsoft Office Accounting Updated Company Format |
| ATK file extension | N/A | Andrew Toolkit Raster Object |
| ATL file extension | Abvent Group | Artlantis 3D Scene Format |
| ATLAS file extension | Firefly Studios Ltd. | Stronghold 3 Editor |
| ATLG file extension | FlashPeak Inc. | SlimBrowser Auto Login |
| ATLOC file extension | Apple, Inc. | Apple Mac OS X Finder |
| ATM file extension | E-on Software | Vue 3D Environment Format |
| ATMC file extension | Adobe Systems Incorporated | Adobe Type Manager |
| ATMN file extension | Tethys Solutions, LLC. | Automation Anywhere Macro |
| ATMSPHR file extension | Planetside Software | TerraGen Latmoshpere Andscape Render |
| ATN file extension | Adobe Systems | Adobe Photoshop Actions Settings Format |
| ATO file extension | E2S nv | ATO Modeler Project |
| ATOM file extension | N/A | Atom Web Feed Format |
| ATOMS file extension | M.Carson | Ribbons Atoms |
| ATP file extension | Planit Solutions Inc. | Alphacam Lathe Post |
| ATPZ file extension | VSoft Technologies Pty Ltd | Automise Compressed Project |
| ATR file extension | Atari | Atari 8-bit Disk Image |
| ATRAC file extension | Sony | Sony ATRAC Audio Format |
| ATS file extension | DB Software Laboratory | Advanced ETL Processor Transformation Script Format |
| ATT file extension | N/A | Web Form Data Format |
| ATTX file extension | Cadence Design Systems, Inc. | Cadence Atribut |
| ATV file extension | The Sage Group plc | ACT! |
| ATX file extension | Hash | Animation Master Plugin Format |
| ATY file extension | 3D-Scape | Association Type Placeholder |
| ATZ file extension | N/A | Atomic Time Zone Format |
| ATZ3 file extension | VSoft Technologies Pty Ltd | Automise |
| AU file extension | N/A | Unix Audio Sound File Format |
| AU3 file extension | AutoIt | AutoIt V3 Script Format |
| AU? file extension | Terry A. Davis | LoseThos Autofile |
| AUC file extension | Jordysoft.com | AUC Database |
| AUD file extension | N/A | Westwood Studios Audio Format |
| AUDIBLEPREFS file extension | Audible, Inc. | Audible Preference |
| AUDIONOTE file extension | Luminant Software, Inc | AudioNote |
| AUF file extension | Planit Solutions Inc. | Alphacam User Font |
| AUG file extension | N/A | Red Hat Linux Shellvars |
| AUI file extension | AGE SOLUTIONS | AGE3D UI Editor Color Table |
| AUM file extension | Adobe Systems Incorporated | Adobe Update Manager Data |
| AUP file extension | Audacity | Audacity Project Format |
| AUPRESET file extension | Apple, Inc. | Apple Logic Studio Preset |
| AUR file extension | Andrew Gryc | AutoREALM Map |
| AURX file extension | Andrew Gryc | AutoREALM Project |
| AUS file extension | Andrew Gryc | AutoREALM Symbols |
| AUT file extension | Jonathan Bennett | AutoIt Pre V3 Script Format |
| AUTH file extension | ShopSite, Inc. | ShopSite Store Authorization |
| AUTOCONF file extension | The Open Group | Autoconfiguration |
| AUTOMATICDESTINATIONS-MS file extension | Microsoft | Microsoft Windows 7 Jump List Format |
| AUTOPLAY file extension | Indigo Rose | AutoPlay Media Studio Project Format |
| AUTOREG file extension | N/A | Mozilla Application Suite Auto Registration Clue |
| AUX file extension | N/A | TeX/LaTeX Auxiliary References Format |
| AUZ file extension | Ableton | Ableton Authorization Format |
| AV file extension | Final Draft, Inc. | Final Draft AV Document |
| AVA file extension | AvaaBook | AvaaBook EBook |
| AVASTCONFIG file extension | AVAST Software a.s. | Avast Configuration |
| AVASTLIC file extension | AVAST Software | Avast! License Format |
| AVASTSOUNDS file extension | AVAST Software | Avast! Soundpack Format |
| AVATAR file extension | Google Talk Avatar Format | |
| AVB file extension | Avid | Avid Binary Image Format |
| AVC file extension | Kaspersky Lab | Kaspersky Anti-Virus Database Format |
| AVCHD file extension | Sony, Panasonic | High Definition Video Format |
| AVD file extension | MAGIX | MAGIX Movie Edit Pro Video Data Format |
| AVE file extension | Avid Technology | Avid User Format |
| AVENIRPROJ file extension | Mariner Software | StoryMill Project Format |
| AVERY file extension | Avery Dennison | Avery Design & Print Online Label Format |
| AVF file extension | N/A | Video Information |
| AVG file extension | AVG Technologies (Grisoft) | AVG Antivirus Virus Database |
| AVGDX file extension | AVG Technologies | AVG Diagnostic Format |
| AVHD file extension | Microsoft | Microsoft Hyper-V Differencing Disk Format |
| AVI file extension | Microsoft | Audio Video Interleave Movie Format |
| AVJ file extension | Avira Operations | Avira Anti-Vir Job Format |
| AVL file extension | ESRI | ArcView Legend Template Format |
| AVM file extension | AVG Technologies (Grisoft) | AVG Incremental Persistent |
| AVN file extension | altaVENTE | AltaVENTE Application User Notes |
| AVP file extension | Avid Technology | Avid Project Format |
| AVR file extension | N/A | Audio Visual Research Sound Format |
| AVS file extension | AviSynth | Avisynth Script Format |
| AVSI file extension | Ben Rudiak-Gould and all subsequent developers | Avisynth Script |
| AVST file extension | Avery Lee | VirtualDub Template |
| AVT file extension | Savy Soda | Savy Soda Avatar For IPhone Avatar |
| AVV file extension | Avid Technology | Avid Media Composer Volume Bin Format |
| AVW file extension | Mayo Foundation for Medical Education and Research | AnalyzeAVW Image |
| AVX file extension | ESRI | ArcView Extension Plugin Format |
| AVZ file extension | Jerry Blinn | AviSys Backup |
| AW file extension | Microsoft | Answer Wizard Format |
| AWA file extension | ActiveWord Systems, Inc. | ActiveWords |
| AWB file extension | N/A | Adaptive Multi-rate Wideband ACELP Codec Audio Format |
| AWBS file extension | Engineering Directorate | Data Storage |
| AWC file extension | Emulex | Emulex AWC Firmware Update Format |
| AWCAV file extension | ActiveWorlds | ActiveWorlds Browser User Avatar Format |
| AWD file extension | Microsoft | Microsoft Fax Document |
| AWDB file extension | ISS Data Security | Microsoft Works For Mac Database Format |
| AWE file extension | Adobe Systems Incorporated | Adobe Acrobat Bookmark XML |
| AWF file extension | Adobe Systems Incorporated | Adobe WorkFlow Workgroup Plugin |
| AWG file extension | Activeworlds | Activeworlds Object Group Format |
| AWH file extension | ActiveWord Systems, Inc. | ActiveWorlds Browser Help |
| AWI file extension | Audacity | Audacity Wave Information |
| AWK file extension | N/A | AWK Programming Language Script Format |
| AWKW file extension | Awkwords | Awkwords Word Generator Format |
| AWL file extension | Lavasoft | Ad-Aware Language |
| AWLIVE file extension | PY Software | Active WebCam Live Capture Format |
| AWM file extension | Likno Software | Likno AllWebMenus Format |
| AWP file extension | Ability Plus Software | Ability Write Document Template Format |
| AWR file extension | Lavasoft | Ad-Aware Reference |
| AWS file extension | Autodesk | AutoCAD Work Space Format |
| AWSHORTCUT file extension | ActiveWord Systems, Inc. | ActiveWords Shortcut |
| AWSS file extension | N/A | Microsoft Works For Mac Spreadsheet |
| AWT file extension | AbiSource | AbiWord Template Document Format |
| AWW file extension | Ability Plus Software | Ability Write Document Format |
| AWWP file extension | N/A | Microsoft Works For Mac Document |
| AWX file extension | Microsoft Corporation | Microsoft DirectX |
| AWZIP file extension | ActiveWord Systems, Inc. | ActiveWords Compressed Solution |
| AX file extension | N/A | DirectShow Filter Format |
| AX3 file extension | APEX SOFTWARE | Apex Sketch |
| AXA file extension | N/A | Annodex Digital Media Format |
| AXD file extension | Microsoft | ASP.NET Web Handler Format |
| AXE file extension | Microsoft | Microsoft Autoroute Map Format |
| AXF file extension | N/A | ARM Executable Format |
| AXG file extension | Microsoft Corporation | Microsoft AutoRoute Trip |
| AXL file extension | N/A | XML Project |
| AXM file extension | AXMEDIS | Axmedis Object |
| AXP file extension | Canneverbe | CDBurnerXP Audio Compilation Format |
| AXQ file extension | Richardson Software, LLC | Edit Rocket Ada Editor |
| AXR file extension | ElcomSoft Co. Ltd. | ElcomSoft Adcanced Archive Password Recovery |
| AXS file extension | N/A | ActiveX Script |
| AXT file extension | Adobe Systems | Adobe Photoshop Replace Color Range Format |
| AXV file extension | N/A | Annodex Digital Media Format |
| AXW file extension | Actix International Limited | Analyzer StateForms |
| AXX file extension | N/A | AxCryot Encrypted Format |
| AY file extension | N/A | Programmable Sound Generator AY-3-8910 Sound Format |
| AZ file extension | Corel Corporation | WinDVD Related |
| AZ! file extension | Vuze | Vuze Partial Download Format |
| AZA file extension | N/A | QazaR Archive Compressed |
| AZD file extension | Amazon.com, Inc. | Amazon Software Download |
| AZF file extension | AirZip | Secure Format |
| AZP file extension | Atomic Games, Inc. | Close Combat Effect |
| AZS file extension | AirZip | Secure Format |
| AZW file extension | Amazon | Amazon Kindle EBook Format |
| AZW1 file extension | Amazon | Amazon Kindle Topaz E-book Format |
| AZW2 file extension | Amazon | Amazon Kindle Program Format |
| AZW3 file extension | Amazon | Amazon Kindle EBook Format |
| AZW3F file extension | N/A | Amazon Kindle Metadata |
| AZW3R file extension | N/A | Amazon Kindle Metadata |
| AZW4 file extension | Amazon | Amazon Kindle Print Replica Ebook Format |
| AZZ file extension | Antanas Zdramys | AZZ Cardfile Information Card Format |
| AZZX file extension | Antanas Zdramys | Uncompressed AZZ Cardfile Data Format |
Web Developer acting on his own, author of Internet solutions facilitating working with new technologies for less advanced users. Internet maniac.
