: A

.a
Static Library N/A
.a00
ALZip Second Split Archive File ESTsoft
.a01
ALZip Third Split Archive File ESTsoft
.a02
ALZip Fourth Split Archive File ESTsoft
.a1wish
Audials Wishlist File RapidSolution Software
.a26
Atari 2600 ROM N/A
.a2b
Adlib Tracker II Instrument Bank Adlib
.a2c
Alice Object File Carnegie Mellon University
.a2i
Adlib Tracker II Instrument File Adlib
.a2l
ASAP2 ECU Description File ASAM MCD-2MC
.a2m
Adlib Tracker II File Adlib
.a2p
Adlib Tracker II Pattern File Adlib
.a2t
Adlib Tracker II Tiny Module File Adlib
.a2theme
Aston 2 Theme File Gladiators Software
.a2w
Alice World Carnegie Mellon University
.a3l
Authorware 3 Library Adobe Systems
.a3m
Authorware 3 Macintosh File Adobe Systems
.a3w
Authorware 3 Windows File Adobe Systems
.a4l
Authorware 4 Library Adobe Systems
.a4m
Authorware 4 Macintosh File Adobe Systems
.a4p
A4Desk Pro Project File Avanquest Software
.a4w
Authorware 4 Windows File Adobe Systems
.a52
Atari 5200 ROM N/A
.a5l
Authorware 5 Library Adobe Systems
.a5w
Alpha Five Webpage File Alpha Software
.a65
Authorware 6.5 File Adobe Systems
.a6p
Authorware 6 Program Adobe Systems
.a8s
Anim8or Script Steven Glanville
.aa
Audible Audio Book File Audible
.aa3
ATRAC Audio File Sony
.aac
Advanced Audio Coding File N/A
.aaf
Advanced Authoring Format File Avid Technology
.aam
Authorware Map File Adobe Systems
.aao
Agenda At Once File Dataland Software
.aaui
Acrobat User Interface File Adobe Systems
.aawdef
Ad-Aware Definitions File Lavasoft
.aax
Audible Enhanced Audiobook File Audible
.ab
Android ADB Backup File Google
.ab1
DNA Electropherogram File N/A
.ab2
Print Shop Address Book File Broderbund
.ab3
PhotoImpact 3 Album File Ulead Systems
.aba
Palm Address Book Archive Palm
.abbu
Address Book Backup N/A
.abc
ABC Music Notation N/A
.abcd
AudioVisual Book Data File AV Books Publishers
.abdata
Adobe Bridge Data File Adobe Systems
.abf
Analysis Services Backup File Microsoft
.abi
DNA Chromatogram File N/A
.abk
Automatic Backup File N/A
.abkprj
Ashampoo Backup Project Ashampoo
.abm
Photo Album N/A
.abp
AVS Barcode Profile AVS
.abr
Adobe Photoshop Brushes File Adobe Systems
.abs
Absolute Database File ComponentAce
.abw
AbiWord Document AbiSource
.aby
AOL Address Book File AOL
.ac
Autoconf Script N/A
.ac$
AutoCAD Temporary File Autodesk
.ac3
Audio Codec 3 File N/A
.ac5
ArtCut 5 Document Wentai
.ac6
ArtCut 6 Document Wentai
.aca
Agent Character Animation File Microsoft
.acb
Adobe Photoshop Color Book File Adobe Systems
.acbl
Adobe Color Book Legacy File Adobe Systems
.acc
Graphics Accounts Data File FKJ Software
.accda
Access Add-in File Microsoft
.accdb
Access 2007 Database File Microsoft
.accdc
Microsoft Access Signed Package Microsoft
.accde
Access Execute Only Database Microsoft
.accdr
Access Runtime Application Microsoft
.accdt
Microsoft Access Database Template Microsoft
.accdu
Access Add-in File Microsoft
.accdw
Microsoft Access Database Link File Microsoft
.accft
Microsoft Access Data Type Template Microsoft
.accountpicture-ms
Windows 8 Account Picture File Microsoft
.acd
ACID Project File Sony
.acd-bak
Sony ACID Project Backup File Sony
.acd-zip
Sony ACID Project With Embedded Media File Sony
.ace
WinAce Compressed File WinAce
.acf
Steam Application Cache File Valve
.acfm
Adobe Composite Font Metrics File Adobe Systems
.acg
Audio Comparer Group File Bolide Software
.acl
AutoCorrect List File Microsoft
.acm
Interplay Audio File BioWare
.aco
Adobe Photoshop Color Swatch File Adobe Systems
.acorn
Acorn Image Flying Meat
.acp
Alfresco Content Package Alfresco Software
.acr
ACRobot Script Acr-Soft
.acrobatsecuritysettings
Adobe Acrobat Security Settings File Adobe Systems
.acrodata
Acrobat Data File Adobe Systems
.acroplugin
Adobe Acrobat Plug-in Adobe Systems
.acs
Agent Character File Microsoft
.acsm
Adobe Content Server Message File Adobe Systems
.act
ADPCM Compressed Audio File N/A
.action
Automator Action Apple
.actm
AutoCAD Action Macro File Autodesk
.actx
DS Game Maker Action Description File Invisionsoft
.acv
Photoshop Curves File Adobe Systems
.acw
Windows Accessibility Wizard File Microsoft
.acx
Atari ST Program Atari
.ad
After Dark Screensaver Berkeley Systems
.ada
Ada Source Code N/A
.adadownload
Adobe Download Assistant Partial Download File Adobe Systems
.adb
Alpha Five Database File Alpha Software
.adc
Scanstudio 16 Color Image Steffen Gutmann
.adcp
Adobe Device Central Project File Adobe Systems
.add
Dynamics AX Developer Documentation File Microsoft
.addin
Visual Studio Add-in Definition File Microsoft
.addon
CFS Console Add-on File Zaplots
.ade
Access Project Extension Microsoft
.adf
ESRI ArcInfo Binary Grid Format ESRI
.adg
Ableton Device Group Ableton
.adi
Active@ Disk Image Backup File Active@ Data Recovery Software
.adm
Administrative Template File N/A
.adml
Group Policy Language-Specific Administrative Template Microsoft
.admx
Group Policy Administrative Template File Microsoft
.adn
Access Blank Project Template Microsoft
.ado
Adobe Photoshop Duotone Options File Adobe Systems
.adox
ActivDox Document ActivDox
.adp
Access Project Microsoft
.adpp
Adobe Device Profile Package Adobe Systems
.adr
Opera Bookmarks File N/A
.ads
Ada Specification File N/A
.adt
ACT! Document Template Sage Software
.adts
Audio Data Transport Stream File N/A
.adu
Addict User Dictionary File Addictive Software
.adv
Nortek Acoustic Doppler Velocimeter File Nortek
.advs
Adobe Device Central Device Set Adobe Systems
.adx
Approach Index File N/A
.adz
Compressed Amiga Disk File N/A
.aea
AdWords Editor Archive Google
.aec
Cinema 4D After Effects Composition MAXON
.aep
After Effects Project Adobe Systems
.aepkey
Advanced Encryption Package Key File InterCrypto
.aepx
After Effects XML Project Adobe Systems
.aes
AES Crypt Encrypted File Packetizer
.aet
After Effects Project Template Adobe Systems
.aetx
After Effects XML Project Template Adobe Systems
.aex
Alpha Five Compiled Global Functions File Alpha Software
.af2
Micrografx ABC FlowCharter 2 File iGrafx
.af3
Micrografx ABC FlowCharter 3/4 File iGrafx
.afc
Mass Effect 2 Audio File Electronic Arts
.afd
Alphacam Flame Drawing Planit
.afe
Avid File Exchange File Avid Technology
.aff
AFF Disk Image Basis Technology
.afm
Adobe Font Metrics File N/A
.afp
FileProtector Encrypted File AndrosaSoft
.afploc
Apple Filing Protocol Location Apple
.afs
STAAD.foundation Project File Bentley Systems
.aft
Ancestry.com Family Tree Database Ancestry.com
.afx
Auto FX Photo/Graphic Edges Image Auto FX Software
.agb
Game Boy Advance ROM N/A
.agd
AgileGraph Data File AgileGraph
.age3scn
Age of Empires 3 Scenario File Microsoft
.aggr
Adobe Captivate Aggregate File Adobe Systems
.agi
Asterisk Gateway Interface File Digium
.agif
Active GIF Creator Project Image Tools Group
.agm
DTS Multi-channel Pro Packer File DTS
.agp
ArtGem Project File RL Vision
.agr
Ableton Groove File Ableton
.ahd
Dynamics AX Online Help Data File Microsoft
.ahi
Dynamics AX Online Help Index File Microsoft
.ahk
AutoHotkey Script AutoHotkey
.ahl
eMule Metadata File eMule
.ahs
Adobe Halftone Screen File Adobe Systems
.ahu
Adobe Photoshop HSL File Adobe Systems
.ahx
WinAHX Tracker Module N/A
.ai
Adobe Illustrator File Adobe Systems
.aia
Adobe Illustrator Action File Adobe Systems
.aic
Advanced Image Coding File N/A
.aif
Audio Interchange File Format Apple
.aifb
AIF Builder Project File Symbian
.aifc
Compressed Audio Interchange File N/A
.aiff
Audio Interchange File Format Apple
.aim
AIMMS ASCII Model File Paragon Decision Technology
.aimppl
AIMP Playlist File AIMP DevTeam
.ain
Source Engine Compiled AI Nodegraph File Valve
.aip
Illustrator Plug-in Adobe Systems
.air
Adobe AIR Installation Package Adobe Systems
.ais
ACDSee Image Sequence File ACD Systems
.ait
Adobe Illustrator Template Adobe Systems
.aiu
Advanced Installer Updates Configuration File Caphyon
.aiv
AIVault Data File EllaZ Systems
.ajp
CCTV Video File N/A
.akp
Akai Sampler File N/A
.al
A-Law Compressed Sound Format N/A
.alac
ALAC Encoded Audio File Apple
.alaw
A-Law Compressed Sound Format N/A
.alb
Alpha Five Library Alpha Software
.albm
HP Photo Printing Software Album File HP
.alc
Ableton Live Clip File Ableton
.ald
Dynamics AX Application Label Data File Microsoft
.ale
Avid Log Exchange File Avid Technology
.alf
ACT! Lookup File The Sage Group
.ali
Dynamics AX Label Index File Microsoft
.all
Cubasis Project File Steinberg
.alp
Ableton Live Pack File Ableton
.alr
ADRIFT Language Resource File Campbell Wild
.als
Ableton Live Set File Ableton
.alt
Dynamics AX Temporary File Microsoft
.alv
Adobe Photoshop Levels File Adobe Systems
.alx
ActiveX Layout Control File Microsoft
.alz
ALZip Archive ESTsoft
.am
Automake Makefile Template Automake
.am1
Adventure Maker The Adventure Maker Team
.am4
AutoPlay Media Studio 4 Project File Indigo Rose
.am5
AutoPlay Media Studio 5 Project File Indigo Rose
.am6
AutoPlay Media Studio 6 Project Indigo Rose
.am7
AutoPlay Media Studio 7 Project Indigo Rose
.amb
All My Books Database File Bolide Software
.amc
AMC Video File N/A
.amf
Advanced Module File N/A
.amfm
Adobe Multiple Font Metrics File Adobe Systems
.aml
ACPI Machine Language File The ACPICA Project
.amm
All My Movies Database File Bolide Software
.amp
Adobe Photoshop Curves Map File Adobe Systems
.amr
Adaptive Multi-Rate Codec File N/A
.ams
Adobe Monitor Setup file N/A
.amsorm
OnLine Ringman Auction Client File Xcira
.amu
PictureGear Studio Photo Album File Sony
.amv
Anime Music Video File N/A
.amx
Adobe Motion Exchange File Adobe Systems
.amxd
Ableton Max Patch File Ableton
.amxx
AMX Mod X Plugin File N/A
.amz
Amazon MP3 Downloader File Amazon
.an
Adobe Edge Animate Project File Adobe Systems
.an1
Street Atlas USA Draw File DeLorme
.an2
Croc Legend of the Gobbos Animation File Argonaut Software
.an8
Anim8or File Steven Glanville
.ane
Adobe AIR Native Extension Adobe Systems
.ani
Windows Animated Cursor Microsoft
.anim
Maya Animation File Autodesk
.animset
FaceFX Animation Set File OC3 Entertainment
.animset_ingame
FaceFX In-Game Animation Set File OC3 Entertainment
.anjuta
Anjuta IDE Project File The GNOME Project
.anm
3D Animation File N/A
.anme
Anime Studio Document Smith Micro
.ann
Help Annotations N/A
.annot
Adobe Digital Editions Annotations File Adobe Systems
.ans
ANSI Text File N/A
.ansym
Adobe Edge Animate Library File Adobe Systems
.antispam5
Personal AntiSpam Settings File Intego
.anx
HotDocs Answer File HotDocs
.any
AnyRail Layout Plan DRail Modelspoor Software
.aob
DVD-Audio Audio Object File N/A
.aod
Dynamics AX Object Data File Microsoft
.aof
Artlantis Object File Abvent Group
.aoi
Art of Illusion 3D Scene Peter Eastman
.aois
CFS Console Add-on Installer Settings File Zaplots
.aol
America Online File AOL
.aom
After Effects Output Module Adobe Systems
.aos
ARCHOS PCtablet Firmware File ARCHOS
.ap
Active Page Fifth Generation Systems
.apa
RSView Development Project Archive Rockwell Automation
.apalbum
Aperture Album File Apple
.apd
ACDSee Photo Document ACD Systems
.ape
AVS Plugin Effects File Nullsoft
.apf
Adobe Profile File Adobe Systems
.aph
Ability Album File Ability Plus Software
.api
Acrobat Plug-in Adobe Systems
.apk
Android Package File Google
.apl
ArcPad Layer File ESRI
.aplg
Audials Plug-in RapidSolution Software
.aplibrary
Aperture Library Apple
.aplp
Audials Plug-in Package RapidSolution Software
.apm
Aldus Placeable Metafile Image Adobe Systems
.apng
Animated Portable Network Graphic N/A
.apnx
Amazon Page Number Index File Amazon
.app
Mac OS X Application Apple
.appdownload
Mac App Store Partially Downloaded App Apple
.applescript
AppleScript File Apple
.applet
Eclipse Java Applet Policy File Eclipse
.application
ClickOnce Deployment Manifest File Microsoft
.appref-ms
Microsoft Application Reference File Microsoft
.appup
Erlang Application Upgrade File Erlang
.appx
Windows 8 App Package Microsoft
.appxsym
Windows 8 App Package Symbols File Microsoft
.appxupload
Windows 8 App Upload Package Microsoft
.apr
ArcView Project File ESRI
.aps
Visual C++ Resource File Microsoft
.apt
Almost Plain Text File N/A
.apx
Ability Photopaint Studio Image Ability Plus Software
.apxl
Keynote Presentation Data File Apple
.apz
Autoplay Media Studio Exported Project Indigo Rose
.ap_
ADT Android Developer Package Google
.aqm
AlpineQuest Map File MOBAC
.aqt
AQTitle Subtitles File N/A
.ar
Unix Static Library N/A
.ara
Archivaldo Resource Archive LittleApps
.arc
Symbian OS Backup File Nokia
.arch00
F.E.A.R. Game Archive Sierra
.arcut
Prelude Rough Cut File Adobe Systems
.ard
ArtiosCAD Workspace File Esko
.arena
Quake 3 Engine Arena File id Software
.arf
WebEx Advanced Recording File WebEx Communicatons
.arff
Attribute-Relation File Format University of Waikato
.arg
AutoCAD Profile Autodesk
.arh
ProTool Compressed Project File Siemens
.ari
ARRIRAW Image ARRI Group
.aria
Chipsounds Sound File Plogue
.ariax
Chipsounds XML Sound File Plogue
.arj
ARJ Compressed File Archive ARJ Software
.ark
PowerDesk Pro Archive ARK11
.arl
AOL Organizer File AOL
.aro
SteelArrow Web Application File Tomahawk Technologies
.arp
Audition Replay File Redbana
.arpack
ArtRage Package Ambient Design
.arr
Advanced RAR Password Recovery Project Elcomsoft
.ars
After Effects Render Settings File Adobe Systems
.arsc
Android Package Resource File Google
.arscript
ArtRage Script Ambient Design
.art
AOL Compressed Image File AOL
.artb
Artboard Document Mapdiva
.artproj
Artifacts Project Versioned
.artwork
ArtStudio Image DrawingHand
.arw
Sony Digital Camera Image Sony
.arx
AutoCAD Runtime Extension File Autodesk
.as
ActionScript File Adobe Systems
.as2proj
FlashDevelop ActionScript 2 Project File FlashDevelop
.as3proj
FlashDevelop ActionScript 3 Project File FlashDevelop
.as4
askSam Backup File askSam Systems
.asa
ASP Configuration File N/A
.asat
Assemble SAT 3D Model File N/A
.asax
ASP.NET Server Application File Microsoft
.asb
Alphacam Stone VB Macro File Planit
.asc
ActionScript Communication File Adobe Systems
.ascii
ASCII Text File N/A
.ascs
ActionScript Communication Server File Adobe Systems
.ascx
ASP.NET User Control File Microsoft
.asd
Word AutoSave File Microsoft
.asdb
Asphyre Sphinx Archive File Afterwarp Development
.ase
Adobe Swatch Exchange File Adobe Systems
.asec
Android Secure Application File Google
.asf
Advanced Systems Format File Microsoft
.ash
Audiosurf Audio Metadata File Audiosurf
.ashbak
Ashampoo Backup Archive Ashampoo
.ashdisc
Ashampoo Burning Studio Image Ashampoo
.ashprj
Ashampoo Burning Studio Project Ashampoo
.ashx
ASP.NET Web Handler File Microsoft
.asi
Alpha Five Variable File Alpha Software
.ask
askSam Database askSam Systems
.asl
Photoshop Style Adobe Systems
.asm
Assembly Language Source Code File N/A
.asmx
ASP.NET Web Service File Microsoft
.asnd
Adobe Sound Document Adobe Systems
.asp
Active Server Page Microsoft
.aspx
Active Server Page Extended File Microsoft
.asr
ActionScript Remote Document Adobe Systems
.ass
Aegisub Advanced Substation Alpha File N/A
.asset
Unity Asset File Unity Technologies
.ast
Adobe Color Separations Table Adobe Systems
.asv
Adobe Photoshop Selective Color File Adobe Systems
.asvf
Asphyre Sphinx Archive File Afterwarp Development
.asw
ACDSee Slideshow Wizard File ACD Systems
.aswcs
Avast! Compressed Skin File AVAST Software
.asws
Avast! Skin File AVAST Software
.asx
Microsoft ASF Redirector File Microsoft
.asy
Asymptote Module Asymptote
.at3
ATRAC3 Audio File Sony
.at5
Lowrance Map File Lowrance
.atahd
ATA Hard Drive Flag File Puppy Linux
.atc
AutoCAD Tool Catalog File Autodesk
.ate
Office Accounting Compressed Backup File Microsoft
.atf
Axon Text File Molecular Devices
.ath
Alienware AlienFX Theme File Dell
.ati
Office Accounting Updated Company File Microsoft
.atl
Artlantis 3D Scene File Abvent Group
.atm
Vue Atmospheres File E-on Software
.atn
Photoshop Actions File Adobe Systems
.atom
Atom Syndication Format N/A
.atr
Atari Disk Image Atari
.atrac
Sony ATRAC Audio File Sony
.ats
Advanced ETL Transformation Script DB Software Laboratory
.att
Web Form Post Data File N/A
.attr
iPhoto Attributes File Apple
.atx
ArcGIS Attribute Index File ESRI
.aty
Association Type Placeholder G&A M.C.
.atz
Aston Compiled Theme Gladiators Software
.au
Audio File N/A
.au3
AutoIt v3 Script AutoIt
.aud
Video Game Compressed Audio File N/A
.aup
Audacity Project File Audacity
.aut
AutoIt Script File Jonathan Bennett
.automaticdestinations-ms
Windows Jump List File Microsoft
.autoplay
AutoPlay Media Studio Project File Indigo Rose
.aux
LaTeX Auxiliary File N/A
.auz
Ableton Authorization File Ableton
.ava
AvaaBook eBook AvaaBook
.avastlic
Avast! License File AVAST Software
.avastsounds
Avast! Soundpack File AVAST Software
.avatar
Google Talk Avatar File Google
.avb
Avid Bin File Avid
.avc
Kaspersky Virus Database Kaspersky Lab
.avchd
High Definition Video File Sony, Panasonic
.avd
Movie Edit Pro Video Information File MAGIX
.ave
Avid User File Avid Technology
.avenirproj
StoryMill Project Mariner Software
.avery
Avery Design & Print Online Label File Avery Dennison
.avgdx
AVG Diagnostics File AVG Technologies
.avhd
Hyper-V SnapShot File Microsoft
.avi
Audio Video Interleave File Microsoft
.avj
AntiVir Job File Avira Operations
.avl
ArcView Legend File ESRI
.avp
Avid Project File Avid Technology
.avr
Audio Visual Research File N/A
.avs
AviSynth Script File AviSynth
.avv
Avid Volume Bin File Avid Technology
.avx
ArcView Extension File ESRI
.aw
Answer Wizard File Microsoft
.awb
AMR-WB Audio File N/A
.awc
Emulex AWC Firmware Update File Emulex
.awcav
ActiveWorlds Custom Avatar File ActiveWorlds
.awd
Microsoft Fax Document Microsoft
.awdb
Access Walker Database File ISS Data Security
.awg
Activeworlds Object Group File Activeworlds
.awk
AWK Script Free Software Foundation
.awkw
Awkwords Word Generator File Awkwords
.awlive
Active Webcam Video File PY Software
.awm
AllWebMenus Project File Likno Software
.awp
Ability Write Template Ability Plus Software
.aws
Ability Spreadsheet File Ability Plus Software
.awt
AbiWord Template AbiSource
.aww
Ability Write Document Ability Plus Software
.ax
DirectShow Filter N/A
.axd
ASP.NET Web Handler File Microsoft
.axe
AutoRoute Map File Microsoft
.axm
AXMEDIS Object AXMEDIS
.axp
CDBurnerXP Audio Compilation File Canneverbe
.axt
Adobe Photoshop Extract File Adobe Systems
.axx
AxCrypt Encrypted File Axantum Software
.ay
AY Chiptune File N/A
.az!
Vuze Partial Download File Vuze
.azf
AirZip FileSECURE File AirZip
.azs
AirZip FileSECURE File AirZip
.azw
Amazon Kindle eBook File Amazon
.azw1
Amazon Topaz eBook Amazon
.azw2
Kindle Active Content App File Amazon
.azw3
Amazon KF8 eBook File Amazon
.azw4
Amazon Print Replica eBook Amazon
.azz
AZZ Cardfile Database File Antanas Zdramys
.azzx
Uncompressed AZZ Cardfile Data File Antanas Zdramys