Windows
Support Guide

Applies to: Microsoft Windows (All versions)
Home Find file extension (eg.: .doc,.png)

File extension?

A file extension is a suffix to the name of a computer file, which defines and determines easily the file's generic type. In Windows and DOS operating system file extension is a requirement whereas, in some other operating system such as UNIX it is optional. Usually the file extension consists of two, three or four characters following a period.
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Recently updated file extensions

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Find file extension (eg.: .pdf)

.a - Source code and script files

.a00 - Miscellaneous file type

.a01 - Miscellaneous file type

.a02 - Miscellaneous file type

.a03 - Miscellaneous file type

.a04 - Miscellaneous file type

.a05 - Miscellaneous file type

.a06 - Miscellaneous file type

.a07 - Miscellaneous file type

.a08 - Miscellaneous file type

.a09 - Miscellaneous file type

.a10 - Archive file type

.a11 - Miscellaneous file type

.a12 - Miscellaneous file type

.a13 - Miscellaneous file type

.a14 - Miscellaneous file type

.a15 - Miscellaneous file type

.a16 - Miscellaneous file type

.a17 - Miscellaneous file type

.a18 - Miscellaneous file type

.a19 - Miscellaneous file type

.a1wish - Miscellaneous file type

.a2d - Miscellaneous file type

.a2desktop - Miscellaneous file type

.a2key - Miscellaneous file type

.a2l - Miscellaneous file type

.a2lng - Miscellaneous file type

.a2menu - Miscellaneous file type

.a2panel - Miscellaneous file type

.a2reg - Miscellaneous file type

.a2s - Miscellaneous file type

.a2theme - Miscellaneous file type

.a33 - Miscellaneous file type

.a3d - Miscellaneous file type

.a3e - Miscellaneous file type

.a3s - Miscellaneous file type

.a3x - Miscellaneous file type

.a4e - Data file type

.a4m - Miscellaneous file type

.a4p - Miscellaneous file type

.a52 - Miscellaneous file type

.a7d - Miscellaneous file type

.a7e - Miscellaneous file type

.a7l - Miscellaneous file type

.a7p - Miscellaneous file type

.a7r - Miscellaneous file type

.aa - Audio file type

.aaa - Miscellaneous file type

.aaaa-NewCmdPrompt - Miscellaneous file type

.aac - Audio file type

.aam - Data file type

.aas - Data file type

.aaw - Settings file type

.aax - Miscellaneous file type

.ab - Data file type

.ab! - Miscellaneous file type

.ab1 - Data file type

.ab2 - Miscellaneous file type

.ab3 - Miscellaneous file type

.ab6 - Data file type

.ab8 - Miscellaneous file type

.aba - Archive file type

.ABB - Miscellaneous file type

.abc - Audio file type

.abd - Miscellaneous file type

.abdata - Miscellaneous file type

.abf - Font file type

.abi - Data file type

.abicollab - Miscellaneous file type

.abk - Backup file type

.abkf - Miscellaneous file type

.abkprj - Miscellaneous file type

.abm - Data file type

.abp - Configuration file type

.abr - Graphic file type

.abs - Game file type

.abu - Miscellaneous file type

.abw - Text file type

.ac - Miscellaneous file type

.ac$ - Miscellaneous file type

.ac3 - Audio file type

.aca - Miscellaneous file type

.acb - Data file type

.acbl - Miscellaneous file type

.acc - Miscellaneous file type

.accda - Text file type

.accdb - Text file type

.accdc - Miscellaneous file type

.accde - Text file type

.accdr - Miscellaneous file type

.accdt - Text file type

.accdu - Text file type

.accdw - Miscellaneous file type

.accessor - Miscellaneous file type

.accft - Miscellaneous file type

.acd - Miscellaneous file type

.acd-bak - Miscellaneous file type

.acd-zip - Miscellaneous file type

.ace - Archive file type

.acf - Data file type

.acg - Data file type

.ACI - Miscellaneous file type

.acl - Miscellaneous file type

.acm - Miscellaneous file type

.acmb - Graphic file type

.aco - Graphic file type

.acp - Text file type

.acr - Miscellaneous file type

.acrobatsecuritysett...dll - Miscellaneous file type

.acs - Data file type

.acsm - Data file type

.act - Data file type

.action - Executable file type

.actm - Miscellaneous file type

.actproj - Miscellaneous file type

.acv - Miscellaneous file type

.acw - Video file type

.acx - Miscellaneous file type

.ad - Video file type

.ad_asm - Miscellaneous file type

.ad_bom - Miscellaneous file type

.ad_drw - Miscellaneous file type

.ad_pcf - Miscellaneous file type

.ad_prt - Miscellaneous file type

.ad_scf - Miscellaneous file type

.ad_smp - Miscellaneous file type

.ad_sym - Miscellaneous file type

.ad2 - Audio file type

.ad3 - Audio file type

.ada - Source code and script files

.adb - Database file type

.adc - Image file type

.adcp - Miscellaneous file type

.add - Graphic file type

.AddIn - Miscellaneous file type

.ade - Miscellaneous file type

.ade_aq - Miscellaneous file type

.adept - Miscellaneous file type

.adf - Archive file type

.adg - Audio file type

.adi - Graphic file type

.adl - Data file type

.adm - System file type

.adn - Text file type

.ado - Miscellaneous file type

.adobebridge - Data file type

.adp - Executable file type

.adp_aq - Miscellaneous file type

.adpp - Miscellaneous file type

.adpr - Miscellaneous file type

.adq - Miscellaneous file type

.adr - Internet related file type

.ads - Source code and script files

.adt - Data file type

.adts - Miscellaneous file type

.adv - System file type

.advs - Miscellaneous file type

.adx - Emulator file type

.adz - Archive file type

.aebl - Miscellaneous file type

.aec - 3D graphics file type

.aedprj - Miscellaneous file type

.aeh - Miscellaneous file type

.ael - Miscellaneous file type

.aeo - Miscellaneous file type

.aep - Miscellaneous file type

.aepx - Miscellaneous file type

.aer - Miscellaneous file type

.aes - Miscellaneous file type

.aet - Miscellaneous file type

.aew - Miscellaneous file type

.aewl - Miscellaneous file type

.aex - Miscellaneous file type

.af2 - Data file type

.af3 - Graphic file type

.afa - Miscellaneous file type

.afc - Audio file type

.afi - Graphic file type

.afl - Miscellaneous file type

.afm - Font file type

.afmp - Miscellaneous file type

.afo - Miscellaneous file type

.afp - Text file type

.afs - Miscellaneous file type

.aft - Data file type

.afw - Miscellaneous file type

.afx - Miscellaneous file type

.aggr - Miscellaneous file type

.aglib - Miscellaneous file type

.aglq - Miscellaneous file type

.agls - Miscellaneous file type

.agluap - Miscellaneous file type

.agmodule - Miscellaneous file type

.agp - Miscellaneous file type

.agr - Graphic file type

.agtoolkit - Miscellaneous file type

.agx - Miscellaneous file type

.ahk - Miscellaneous file type

.ahp - Miscellaneous file type

.ahs - Miscellaneous file type

.ahu - Miscellaneous file type

.ai - Graphic file type

.aia - Miscellaneous file type

.aif - Audio file type

.aifc - Audio file type

.aiff - Audio file type

.aim - Data file type

.ain - Archive file type

.aio - Source code and script files

.aip - Miscellaneous file type

.air - Executable file type

.ais - Image file type

.ait - Miscellaneous file type

.aix - Data file type

.ajg - Miscellaneous file type

.ajp - Audio file type

.akai - Miscellaneous file type

.akp - Miscellaneous file type

.aks - Miscellaneous file type

.al - Miscellaneous file type

.al8 - Miscellaneous file type

.ala - Miscellaneous file type

.alac - Audio file type

.alaw - Miscellaneous file type

.alb - Data file type

.albm - Graphic file type

.albw - Miscellaneous file type

.alc - Miscellaneous file type

.ald - Miscellaneous file type

.alg - Image file type

.alias - Miscellaneous file type

.all - Audio file type

.aln - Miscellaneous file type

.alo - Game file type

.alp - Miscellaneous file type

.als - Miscellaneous file type

.alt - Data file type

.alv - Miscellaneous file type

.alw - Miscellaneous file type

.alx - Internet related file type

.alz - Archive file type

.am7 - Miscellaneous file type

.ama - Miscellaneous file type

.amb - Miscellaneous file type

.amc - Miscellaneous file type

.amd - Miscellaneous file type

.ame - Data file type

.ameproj - Miscellaneous file type

.ameprojcs5 - Miscellaneous file type

.amf - Emulator file type

.amform - Miscellaneous file type

.amg - Archive file type

.amh - Miscellaneous file type

.amiglobe - Miscellaneous file type

.aml - System file type

.amltkey - Miscellaneous file type

.amm - Miscellaneous file type

.amo - Plugin file type

.amp - Miscellaneous file type

.amp5 - Miscellaneous file type

.amp5results - Miscellaneous file type

.amp6 - Miscellaneous file type

.amp6results - Miscellaneous file type

.amproj - Miscellaneous file type

.amproject - Miscellaneous file type

.amr - Audio file type

.ams - Configuration file type

.amsorm - Miscellaneous file type

.amt - Miscellaneous file type

.amv - Video file type

.amw - Miscellaneous file type

.amz - Miscellaneous file type

.analysis - Miscellaneous file type

.anb - Miscellaneous file type

.ani - System file type

.anic - Miscellaneous file type

.anm - Graphic file type

.anme - Miscellaneous file type

.ann - System file type

.ans - Text file type

.ant - Data file type

.anx - Miscellaneous file type

.AnyDVD - Miscellaneous file type

.anydvdhd - Miscellaneous file type

.aob - Miscellaneous file type

.aoe - Miscellaneous file type

.aof - Miscellaneous file type

.aol - Miscellaneous file type

.aos - Encrypted file type

.aov - Miscellaneous file type

.ap - Archive file type

.ap1 - Miscellaneous file type

.apc - Data file type

.apd - Graphic file type

.ape - Audio file type

.apex - Miscellaneous file type

.apf - Configuration file type

.aph - Miscellaneous file type

.api - Plugin file type

.apj - Miscellaneous file type

.apk - Archive file type

.apl - Data file type

.apln - Miscellaneous file type

.apm - Graphic file type

.apn - Miscellaneous file type

.app - Executable file type

.app4 - Miscellaneous file type

.app4results - Miscellaneous file type

.app6 - Miscellaneous file type

.app6results - Miscellaneous file type

.application - Miscellaneous file type

.appref-ms - Miscellaneous file type

.apr - Data file type

.aps - Source code and script files

.apt - Miscellaneous file type

.apun - Miscellaneous file type

.apw - Encrypted file type

.apx - Graphic file type

.apz - Miscellaneous file type

.aq - Miscellaneous file type

.aqn - Miscellaneous file type

.aqp - Miscellaneous file type

.aqs - Miscellaneous file type

.aqt - Miscellaneous file type

.aqtimetest - Miscellaneous file type

.aqu - Miscellaneous file type

.ar7 - Archive file type

.arc - Archive file type

.ard - Graphic file type

.arescol - Miscellaneous file type

.arf - Data file type

.arff - Miscellaneous file type

.arh - Archive file type

.ari - Archive file type

.arj - Archive file type

.ark - Archive file type

.arl - Miscellaneous file type

.arlnk - Miscellaneous file type

.arm - Miscellaneous file type

.ArmV1 - Miscellaneous file type

.armv2 - Miscellaneous file type

.arn - Archive file type

.aro - Text file type

.arp - Miscellaneous file type

.arr - Image file type

.ars - Miscellaneous file type

.art - Graphic file type

.arti - Miscellaneous file type

.artx - Miscellaneous file type

.aru - Miscellaneous file type

.arw - Image file type

.arw valuetype: stri...dll - Miscellaneous file type

.arx - Archive file type

.arz - Miscellaneous file type

.as - Audio file type

.as2 - Miscellaneous file type

.as3 - Miscellaneous file type

.asa - Internet related file type

.asax - Miscellaneous file type

.asb - Miscellaneous file type

.asc - Text file type

.ascs - Miscellaneous file type

.ascx - Source code and script files

.asd - Temporary Files

.asdasd - Miscellaneous file type

.asdatabase - Miscellaneous file type

.asdiashowmovementpa...dll - Miscellaneous file type

.asDiaShowStylePrese...dll - Miscellaneous file type

.asdiashowtexteffect...dll - Miscellaneous file type

.asDiaShowToolboxPre...dll - Miscellaneous file type

.ase - Audio file type

.asf - Audio file type

.ash - Data file type

.ashbak - Miscellaneous file type

.ashdisc - Miscellaneous file type

.ashprj - Binary file type

.ashx - Internet related file type

.asi - Source code and script files

.ask - Miscellaneous file type

.asl - Miscellaneous file type

.asm - Source code and script files

.ASMDOT - Miscellaneous file type

.asms - Miscellaneous file type

.asmx - Internet related file type

.asn - Miscellaneous file type

.asnd - Miscellaneous file type

.aso - Data file type

.asp - Internet related file type

.aspc-project - Miscellaneous file type

.asphotoalbumtemplat...dll - Miscellaneous file type

.asPictureEffect - Miscellaneous file type

.aspr - Miscellaneous file type

.asproj - Miscellaneous file type

.aspx - Internet related file type

.asr - Miscellaneous file type

.ass - Text file type

.assecurityinformati...dll - Miscellaneous file type

.asslideshowmanagert...dll - Miscellaneous file type

.ast - Miscellaneous file type

.asv - Miscellaneous file type

.asw - Video file type

.aswcs - Miscellaneous file type

.asws - Miscellaneous file type

.asx - Video file type

.asx_aq - Miscellaneous file type

.asy - Miscellaneous file type

.asz - Miscellaneous file type

.at2 - Data file type

.at3 - Miscellaneous file type

.at4 - Miscellaneous file type

.at5 - Graphic file type

.ata - Miscellaneous file type

.atak?? - Miscellaneous file type

.atc - Graphic file type

.atf - Miscellaneous file type

.atg - Miscellaneous file type

.atl - Miscellaneous file type

.atlg - Miscellaneous file type

.atm - Font file type

.atmo - Miscellaneous file type

.atn - Configuration file type

.atom - Internet related file type

.atp - Graphic file type

.atr - Disk Image file type

.atrac - Audio file type

.ats - Miscellaneous file type

.att - Image file type

.atw - Miscellaneous file type

.atx - Miscellaneous file type

.aty - Data file type

.au - Audio file type

.au3 - Miscellaneous file type

.aucx - Miscellaneous file type

.aud - Audio file type

.audiocd - Audio file type

.audiodvdcreator - Miscellaneous file type

.aui - Miscellaneous file type

.aup - Audio file type

.aus - Miscellaneous file type

.aut - Miscellaneous file type

.authedprj - Miscellaneous file type

.autoplay - Miscellaneous file type

.aux - Data file type

.auz - Data file type

.ava - Graphic file type

.avastlic - Miscellaneous file type

.avb - Video file type

.avc - Database file type

.avchd - Video file type

.avgdi - Miscellaneous file type

.avgdx - Miscellaneous file type

.avi - Video file type

.avi_NEO_ - Miscellaneous file type

.avl - Miscellaneous file type

.avr - Audio file type

.avs - Source code and script files

.avsi - Miscellaneous file type

.avt - Miscellaneous file type

.avx - Plugin file type

.aw - Text file type

.awa - Audio file type

.awb - Audio file type

.awd - Graphic file type

.awf - Miscellaneous file type

.awg - Miscellaneous file type

.awi - Miscellaneous file type

.awk - Source code and script files

.awlive - Miscellaneous file type

.awm - Internet related file type

.awmp - Miscellaneous file type

.awp - Miscellaneous file type

.aws - Text file type

.awt - Miscellaneous file type

.aww - Document file type

.ax - Plugin file type

.ax2 - Miscellaneous file type

.axa - Miscellaneous file type

.axc - Miscellaneous file type

.axd - Internet related file type

.axe - Data file type

.axi - Miscellaneous file type

.axm - Video file type

.axp - Miscellaneous file type

.axt - Miscellaneous file type

.axv - Miscellaneous file type

.axx - Miscellaneous file type

.aym - Miscellaneous file type

.azd - Configuration file type

.azw - Text file type

.azz - Database file type

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