ASSOC

ASSOC is an internal command-line tool used to display or modify the file associations for each of the different file extensions. If used without parameters, assoc displays a list of all the current file name extension associations. Use parameter "/?" to displays help at the command prompt.

System Command ASSOC

Displays or modifies file extension associations.

Syntax

assoc [<.ext>[=[<filetype>]]]

Parameter

<.ext>Specifies the file name extension. <filetype>Specifies the file type to associate with the specified file name extension.

Remarks

This command is only supported within cmd.exe and is not available from PowerShell. Though you can use cmd /c assoc as a workaround. To remove the file type association for a file name extension, add a white space after the equal sign by pressing the SPACEBAR. To view current file types that have open command strings defined, use the ftype command. To redirect the output of assoc to a text file, use the > redirection operator.

List of all the current file name extension associations

ASSOC used without parameters, assoc displays a list of all the current file name extension associations.

Syntax

assoc

List of file name extension associations

.386=vxdfile .3g2=WMP11.AssocFile.3G2 .3gp=WMP11.AssocFile.3GP .3gp2=WMP11.AssocFile.3G2 .3gpp=WMP11.AssocFile.3GP .aac=WMP11.AssocFile.ADTS .accountpicture-ms=accountpicturefile .adt=WMP11.AssocFile.ADTS .adts=WMP11.AssocFile.ADTS .aif=WMP11.AssocFile.AIFF .aifc=WMP11.AssocFile.AIFF .aiff=WMP11.AssocFile.AIFF .ani=anifile .appcontent-ms=ApplicationContent .application=Application.Manifest .appref-ms=Application.Reference .asa=aspfile .asf=WMP11.AssocFile.ASF .asp=aspfile .asx=WMP11.AssocFile.ASX .au=WMP11.AssocFile.AU .avi=WMP11.AssocFile.AVI .bat=batfile .blg=Diagnostic.Perfmon.Document .bmp=Paint.Picture .cab=CABFolder .camp=campfile .cat=CATFile .cda=WMP11.AssocFile.CDA .cdmp=cdmpfile .cdx=aspfile .cdxml=Microsoft.PowerShellCmdletDefinitionXML.1 .cer=CERFile .chk=chkfile .chm=chm.file .cmd=cmdfile .com=comfile .compositefont=Windows.CompositeFont .contact=contact_wab_auto_file .cpl=cplfile .crl=CRLFile .crt=CERFile .css=CSSfile .cur=curfile .db=dbfile .dctx=IMEDictionaryCompiler .dctxc=IMEDictionaryCompiler .dds=ddsfile .der=CERFile .desklink=CLSID\{9E56BE61-C50F-11CF-9A2C-00A0C90A90CE} .deskthemepack=desktopthemepackfile .diagcab=Diagnostic.Cabinet .diagcfg=Diagnostic.Config .diagpkg=Diagnostic.Document .dib=Paint.Picture .dll=dllfile .docx=docxfile .drv=drvfile .dsn=MSDASQL .emf=emffile .eml=Microsoft Email Message .evt=evtfile .evtx=evtxfile .exe=exefile .flac=WMP11.AssocFile.FLAC .fon=fonfile .gif=giffile .gmmp=gmmpfile .group=group_wab_auto_file .grp=MSProgramGroup .hlp=hlpfile .hta=htafile .htm=htmlfile .html=htmlfile .icc=icmfile .icl=IconLibraryFile .icm=icmfile .ico=icofile .imesx=imesxfile .img=Windows.IsoFile .inf=inffile .ini=inifile .iso=Windows.IsoFile .jfif=pjpegfile .Job=JobObject .jod=Microsoft.Jet.OLEDB.4.0 .jpe=jpegfile .jpeg=jpegfile .jpg=jpegfile .js=JSFile .JSE=JSEFile .jxr=wdpfile .label=Label .library-ms=LibraryFolder .lnk=lnkfile .log=txtfile .m1v=WMP11.AssocFile.MPEG .m2t=WMP11.AssocFile.M2TS .m2ts=WMP11.AssocFile.M2TS .m2v=WMP11.AssocFile.MPEG .m3u=WMP11.AssocFile.m3u .m4a=WMP11.AssocFile.M4A .m4v=WMP11.AssocFile.MP4 .mapimail=CLSID\{9E56BE60-C50F-11CF-9A2C-00A0C90A90CE} .mht=mhtmlfile .mhtml=mhtmlfile .mid=WMP11.AssocFile.MIDI .midi=WMP11.AssocFile.MIDI .MK3D=WMP11.AssocFile.MK3D .mka=WMP11.AssocFile.MKA .mkv=WMP11.AssocFile.MKV .mlc=LpkSetup.1 .mod=WMP11.AssocFile.MPEG .mov=WMP11.AssocFile.MOV .mp2=WMP11.AssocFile.MP3 .mp2v=WMP11.AssocFile.MPEG .mp3=WMP11.AssocFile.MP3 .mp4=WMP11.AssocFile.MP4 .mp4v=WMP11.AssocFile.MP4 .mpa=WMP11.AssocFile.MPEG .mpe=WMP11.AssocFile.MPEG .mpeg=WMP11.AssocFile.MPEG .mpg=WMP11.AssocFile.MPEG .mpv2=WMP11.AssocFile.MPEG .ms-windows-store-license=WindowsStore.License .msc=MSCFile .msi=Msi.Package .msp=Msi.Patch .msrcincident=RemoteAssistance.1 .msstyles=msstylesfile .msu=Microsoft.System.Update.1 .mts=WMP11.AssocFile.M2TS .mydocs=CLSID\{ECF03A32-103D-11d2-854D-006008059367} .nfo=MSInfoFile .ocx=ocxfile .odt=odtfile .osdx=opensearchdescription .otf=otffile .p10=P10File .p12=PFXFile .p7b=SPCFile .p7c=certificate_wab_auto_file .p7m=P7MFile .p7r=P7RFile .p7s=P7SFile .partial=IE.AssocFile.PARTIAL .pbk=pbkfile .perfmoncfg=Diagnostic.Perfmon.Config .pfm=pfmfile .pfx=PFXFile .pif=piffile .pko=PKOFile .pnf=pnffile .png=pngfile .ppkg=Microsoft.ProvTool.Provisioning.1 .prf=prffile .printerExport=brmFile .ps1=Microsoft.PowerShellScript.1 .ps1xml=Microsoft.PowerShellXMLData.1 .psc1=Microsoft.PowerShellConsole.1 .psd1=Microsoft.PowerShellData.1 .psm1=Microsoft.PowerShellModule.1 .pssc=Microsoft.PowerShellSessionConfiguration.1 .qds=SavedDsQuery .rat=ratfile .RDP=RDP.File .reg=regfile .resmoncfg=Diagnostic.Resmon.Config .rle=rlefile .rll=dllfile .rmi=WMP11.AssocFile.MIDI .rtf=rtffile .scf=SHCmdFile .scp=txtfile .scr=scrfile .sct=scriptletfile .search-ms=SearchFolder .searchConnector-ms=SearchConnectorFolder .settingcontent-ms=SettingContent .sfcache=RDBFileProperties.1 .snd=WMP11.AssocFile.AU .spc=SPCFile .spl=ShockwaveFlash.ShockwaveFlash .sst=CertificateStoreFile .svg=svgfile .swf=ShockwaveFlash.ShockwaveFlash .symlink=.symlink .sys=sysfile .theme=themefile .themepack=themepackfile .tif=TIFImage.Document .tiff=TIFImage.Document .ts=WMP11.AssocFile.TTS .ttc=ttcfile .ttf=ttffile .tts=WMP11.AssocFile.TTS .txt=txtfile .UDL=MSDASC .URL=InternetShortcut .VBE=VBEFile .vbs=VBSFile .vcf=vcard_wab_auto_file .vhd=Windows.VhdFile .vhdpmem=Windows.VhdPmemFile .vhdx=Windows.VhdFile .vxd=vxdfile .wab=wab_auto_file .wav=WMP11.AssocFile.WAV .wax=WMP11.AssocFile.WAX .wbcat=wbcatfile .wcx=wcxfile .wdp=wdpfile .webpnp=webpnpFile .website=Microsoft.Website .wm=WMP11.AssocFile.ASF .wma=WMP11.AssocFile.WMA .WMD=WMP11.AssocFile.WMD .wmdb=WMP.WMDBFile .wmf=wmffile .WMS=WMP11.AssocFile.WMS .wmv=WMP11.AssocFile.WMV .wmx=WMP11.AssocFile.ASX .wmz=WMP11.AssocFile.WMZ .wpl=WMP11.AssocFile.WPL .wsc=scriptletfile .WSF=WSFFile .WSH=WSHFile .wtx=txtfile .wvx=WMP11.AssocFile.WVX .xaml=Windows.XamlDocument .xbap=Windows.Xbap .xht=xhtmlfile .xhtml=xhtmlfile .xml=xmlfile .xrm-ms=MSSppLicenseFile .xsl=xslfile .ZFSendToTarget=CLSID\{888DCA60-FC0A-11CF-8F0F-00C04FD7D062} .zip=CompressedFolder

Sources and References

• https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/assoc
• https://www.computerhope.com/assoc.htm