Skip to content

Instantly share code, notes, and snippets.

@qti3e

qti3e/README.md

Last active October 31, 2024 00:27
Show Gist options
  • Save qti3e/6341245314bf3513abb080677cd1c93b to your computer and use it in GitHub Desktop.
Save qti3e/6341245314bf3513abb080677cd1c93b to your computer and use it in GitHub Desktop.
Download ZIP
List of file signatures and mime types based on file extensions
Raw
README.md

About

This file was generated automatically based on this two sources:

  1. /etc/nginx/mime.types
  2. http://www.garykessler.net/library/file_sigs.html

File format

This is a JSON object by following structure:

[string ext] : {
  signs: [sign]
  mime: string
}

A sign is a string in this format (without any space):

[int o],[hex s]

where o is x byte offset (Commonly zero)

Example Sign

MP4:

[4 byte offset]
66 74 79 70 69 73 6F 6D

becomes:

4,6674797069736F6D
Raw
extensions.json
{
"123": {
"signs": [
"0,00001A00051004"
],
"mime": "application/vnd.lotus-1-2-3"
},
"cpl": {
"signs": [
"0,4D5A",
"0,DCDC"
],
"mime": "application/cpl+xml"
},
"epub": {
"signs": [
"0,504B03040A000200"
],
"mime": "application/epub+zip"
},
"ttf": {
"signs": [
"0,0001000000"
],
"mime": "application/font-sfnt"
},
"gz": {
"signs": [
"0,1F8B08"
],
"mime": "application/gzip"
},
"tgz": {
"signs": [
"0,1F8B08"
],
"mime": "application/gzip"
},
"hqx": {
"signs": [
"0,28546869732066696C65206D75737420626520636F6E76657274656420776974682042696E48657820"
],
"mime": "application/mac-binhex40"
},
"doc": {
"signs": [
"0,0D444F43",
"0,CF11E0A1B11AE100",
"0,D0CF11E0A1B11AE1",
"0,DBA52D00",
"512,ECA5C100"
],
"mime": "application/msword"
},
"mxf": {
"signs": [
"0,060E2B34020501010D0102010102",
"0,3C435472616E7354696D656C696E653E"
],
"mime": "application/mxf"
},
"lha": {
"signs": [
"2,2D6C68"
],
"mime": "application/octet-stream"
},
"lzh": {
"signs": [
"2,2D6C68"
],
"mime": "application/octet-stream"
},
"exe": {
"signs": [
"0,4D5A"
],
"mime": "application/octet-stream"
},
"class": {
"signs": [
"0,CAFEBABE"
],
"mime": "application/octet-stream"
},
"dll": {
"signs": [
"0,4D5A"
],
"mime": "application/octet-stream"
},
"img": {
"signs": [
"0,000100005374616E64617264204A6574204442",
"0,504943540008",
"0,514649FB",
"0,53434D49",
"0,7E742C015070024D52010000000800000001000031000000310000004301FF0001000800010000007e742c01",
"0,EB3C902A"
],
"mime": "application/octet-stream"
},
"iso": {
"signs": [
"32769,4344303031",
"34817,4344303031",
"36865,4344303031"
],
"mime": "application/octet-stream"
},
"ogx": {
"signs": [
"0,4F67675300020000000000000000"
],
"mime": "application/ogg"
},
"oxps": {
"signs": [
"0,504B0304"
],
"mime": "application/oxps"
},
"pdf": {
"signs": [
"0,25504446"
],
"mime": "application/pdf"
},
"p10": {
"signs": [
"0,64000000"
],
"mime": "application/pkcs10"
},
"pls": {
"signs": [
"0,5B706C61796C6973745D"
],
"mime": "application/pls+xml"
},
"eps": {
"signs": [
"0,252150532D41646F62652D332E3020455053462D332030",
"0,C5D0D3C6"
],
"mime": "application/postscript"
},
"ai": {
"signs": [
"0,25504446"
],
"mime": "application/postscript"
},
"rtf": {
"signs": [
"0,7B5C72746631"
],
"mime": "application/rtf"
},
"tsa": {
"signs": [
"0,47"
],
"mime": "application/tamp-sequence-adjust"
},
"msf": {
"signs": [
"0,2F2F203C212D2D203C6D64623A6D6F726B3A7A"
],
"mime": "application/vnd.epson.msf"
},
"fdf": {
"signs": [
"0,25504446"
],
"mime": "application/vnd.fdf"
},
"fm": {
"signs": [
"0,3C4D616B657246696C6520"
],
"mime": "application/vnd.framemaker"
},
"kmz": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.google-earth.kmz"
},
"tpl": {
"signs": [
"0,0020AF30",
"0,6D7346696C7465724C697374"
],
"mime": "application/vnd.groove-tool-template"
},
"kwd": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.kde.kword"
},
"wk4": {
"signs": [
"0,00001A000210040000000000"
],
"mime": "application/vnd.lotus-1-2-3"
},
"wk3": {
"signs": [
"0,00001A000010040000000000"
],
"mime": "application/vnd.lotus-1-2-3"
},
"wk1": {
"signs": [
"0,0000020006040600080000000000"
],
"mime": "application/vnd.lotus-1-2-3"
},
"apr": {
"signs": [
"0,D0CF11E0A1B11AE1"
],
"mime": "application/vnd.lotus-approach"
},
"nsf": {
"signs": [
"0,1A0000040000",
"0,4E45534D1A01"
],
"mime": "application/vnd.lotus-notes"
},
"ntf": {
"signs": [
"0,1A0000",
"0,30314F52444E414E43452053555256455920202020202020",
"0,4E49544630"
],
"mime": "application/vnd.lotus-notes"
},
"org": {
"signs": [
"0,414F4C564D313030"
],
"mime": "application/vnd.lotus-organizer"
},
"lwp": {
"signs": [
"0,576F726450726F"
],
"mime": "application/vnd.lotus-wordpro"
},
"sam": {
"signs": [
"0,5B50686F6E655D"
],
"mime": "application/vnd.lotus-wordpro"
},
"mif": {
"signs": [
"0,3C4D616B657246696C6520",
"0,56657273696F6E20"
],
"mime": "application/vnd.mif"
},
"xul": {
"signs": [
"0,3C3F786D6C2076657273696F6E3D22312E30223F3E"
],
"mime": "application/vnd.mozilla.xul+xml"
},
"asf": {
"signs": [
"0,3026B2758E66CF11A6D900AA0062CE6C"
],
"mime": "application/vnd.ms-asf"
},
"cab": {
"signs": [
"0,49536328",
"0,4D534346"
],
"mime": "application/vnd.ms-cab-compressed"
},
"xls": {
"signs": [
"512,0908100000060500",
"0,D0CF11E0A1B11AE1",
"512,FDFFFFFF04",
"512,FDFFFFFF20000000"
],
"mime": "application/vnd.ms-excel"
},
"xla": {
"signs": [
"0,D0CF11E0A1B11AE1"
],
"mime": "application/vnd.ms-excel"
},
"chm": {
"signs": [
"0,49545346"
],
"mime": "application/vnd.ms-htmlhelp"
},
"ppt": {
"signs": [
"512,006E1EF0",
"512,0F00E803",
"512,A0461DF0",
"0,D0CF11E0A1B11AE1",
"512,FDFFFFFF04"
],
"mime": "application/vnd.ms-powerpoint"
},
"pps": {
"signs": [
"0,D0CF11E0A1B11AE1"
],
"mime": "application/vnd.ms-powerpoint"
},
"wks": {
"signs": [
"0,0E574B53",
"0,FF000200040405540200"
],
"mime": "application/vnd.ms-works"
},
"wpl": {
"signs": [
"84,4D6963726F736F66742057696E646F7773204D6564696120506C61796572202D2D20"
],
"mime": "application/vnd.ms-wpl"
},
"xps": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.ms-xpsdocument"
},
"cif": {
"signs": [
"2,5B56657273696F6E"
],
"mime": "application/vnd.multiad.creator.cif"
},
"odp": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.oasis.opendocument.presentation"
},
"odt": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.oasis.opendocument.text"
},
"ott": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.oasis.opendocument.text-template"
},
"pptx": {
"signs": [
"0,504B030414000600"
],
"mime": "application/vnd.openxmlformats-officedocument.presentationml.presentation"
},
"xlsx": {
"signs": [
"0,504B030414000600"
],
"mime": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
},
"docx": {
"signs": [
"0,504B030414000600"
],
"mime": "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
},
"prc": {
"signs": [
"0,424F4F4B4D4F4249",
"60,74424D504B6E5772"
],
"mime": "application/vnd.palm"
},
"pdb": {
"signs": [
"11,000000000000000000000000000000000000000000000000",
"0,4D2D5720506F636B6574204469637469",
"0,4D6963726F736F667420432F432B2B20",
"0,736D5F",
"0,737A657A",
"0,ACED0005737200126267626C69747A2E"
],
"mime": "application/vnd.palm"
},
"qxd": {
"signs": [
"0,00004D4D585052"
],
"mime": "application/vnd.Quark.QuarkXPress"
},
"rar": {
"signs": [
"0,526172211A0700",
"0,526172211A070100"
],
"mime": "application/vnd.rar"
},
"mmf": {
"signs": [
"0,4D4D4D440000"
],
"mime": "application/vnd.smaf"
},
"cap": {
"signs": [
"0,52545353",
"0,58435000"
],
"mime": "application/vnd.tcpdump.pcap"
},
"dmp": {
"signs": [
"0,4D444D5093A7",
"0,5041474544553634",
"0,5041474544554D50"
],
"mime": "application/vnd.tcpdump.pcap"
},
"wpd": {
"signs": [
"0,FF575043"
],
"mime": "application/vnd.wordperfect"
},
"xar": {
"signs": [
"0,78617221"
],
"mime": "application/vnd.xara"
},
"spf": {
"signs": [
"0,5350464900"
],
"mime": "application/vnd.yamaha.smaf-phrase"
},
"dtd": {
"signs": [
"0,0764743264647464"
],
"mime": "application/xml-dtd"
},
"zip": {
"signs": [
"0,504B0304",
"0,504B0304",
"0,504B030414000100630000000000",
"0,504B0708",
"30,504B4C495445",
"526,504B537058",
"29152,57696E5A6970"
],
"mime": "application/zip"
},
"amr": {
"signs": [
"0,2321414D52"
],
"mime": "audio/AMR"
},
"au": {
"signs": [
"0,2E736E64",
"0,646E732E"
],
"mime": "audio/basic"
},
"m4a": {
"signs": [
"0,00000020667479704D344120",
"4,667479704D344120"
],
"mime": "audio/mp4"
},
"mp3": {
"signs": [
"0,494433",
"0,FFFB"
],
"mime": "audio/mpeg"
},
"oga": {
"signs": [
"0,4F67675300020000000000000000"
],
"mime": "audio/ogg"
},
"ogg": {
"signs": [
"0,4F67675300020000000000000000"
],
"mime": "audio/ogg"
},
"qcp": {
"signs": [
"0,52494646"
],
"mime": "audio/qcelp"
},
"koz": {
"signs": [
"0,49443303000000"
],
"mime": "audio/vnd.audikoz"
},
"bmp": {
"signs": [
"0,424D"
],
"mime": "image/bmp"
},
"dib": {
"signs": [
"0,424D"
],
"mime": "image/bmp"
},
"emf": {
"signs": [
"0,01000000"
],
"mime": "image/emf"
},
"fits": {
"signs": [
"0,53494D504C4520203D202020202020202020202020202020202020202054"
],
"mime": "image/fits"
},
"gif": {
"signs": [
"0,474946383961"
],
"mime": "image/gif"
},
"jp2": {
"signs": [
"0,0000000C6A5020200D0A"
],
"mime": "image/jp2"
},
"jpg": {
"signs": [
"0,FFD8",
"0,FFD8",
"0,FFD8",
"0,FFD8"
],
"mime": "image/jpeg"
},
"jpeg": {
"signs": [
"0,FFD8",
"0,FFD8"
],
"mime": "image/jpeg"
},
"jpe": {
"signs": [
"0,FFD8",
"0,FFD8"
],
"mime": "image/jpeg"
},
"jfif": {
"signs": [
"0,FFD8"
],
"mime": "image/jpeg"
},
"png": {
"signs": [
"0,89504E470D0A1A0A"
],
"mime": "image/png"
},
"tiff": {
"signs": [
"0,492049",
"0,49492A00",
"0,4D4D002A",
"0,4D4D002B"
],
"mime": "image/tiff"
},
"tif": {
"signs": [
"0,492049",
"0,49492A00",
"0,4D4D002A",
"0,4D4D002B"
],
"mime": "image/tiff"
},
"psd": {
"signs": [
"0,38425053"
],
"mime": "image/vnd.adobe.photoshop"
},
"dwg": {
"signs": [
"0,41433130"
],
"mime": "image/vnd.dwg"
},
"ico": {
"signs": [
"0,00000100"
],
"mime": "image/vnd.microsoft.icon"
},
"mdi": {
"signs": [
"0,4550"
],
"mime": "image/vnd.ms-modi"
},
"hdr": {
"signs": [
"0,233F52414449414E43450A",
"0,49536328"
],
"mime": "image/vnd.radiance"
},
"pcx": {
"signs": [
"512,0908100000060500"
],
"mime": "image/vnd.zbrush.pcx"
},
"wmf": {
"signs": [
"0,010009000003",
"0,D7CDC69A"
],
"mime": "image/wmf"
},
"eml": {
"signs": [
"0,46726F6D3A20",
"0,52657475726E2D506174683A20",
"0,582D"
],
"mime": "message/rfc822"
},
"art": {
"signs": [
"0,4A47040E"
],
"mime": "message/rfc822"
},
"manifest": {
"signs": [
"0,3C3F786D6C2076657273696F6E3D"
],
"mime": "text/cache-manifest"
},
"log": {
"signs": [
"0,2A2A2A2020496E7374616C6C6174696F6E205374617274656420"
],
"mime": "text/plain"
},
"tsv": {
"signs": [
"0,47"
],
"mime": "text/tab-separated-values"
},
"vcf": {
"signs": [
"0,424547494E3A56434152440D0A"
],
"mime": "text/vcard"
},
"dms": {
"signs": [
"0,444D5321"
],
"mime": "text/vnd.DMClientScript"
},
"dot": {
"signs": [
"0,D0CF11E0A1B11AE1"
],
"mime": "text/vnd.graphviz"
},
"ts": {
"signs": [
"0,47"
],
"mime": "text/vnd.trolltech.linguist"
},
"3gp": {
"signs": [
"0,0000001466747970336770",
"0,0000002066747970336770"
],
"mime": "video/3gpp"
},
"3g2": {
"signs": [
"0,0000001466747970336770",
"0,0000002066747970336770"
],
"mime": "video/3gpp2"
},
"mp4": {
"signs": [
"0,000000146674797069736F6D",
"0,000000186674797033677035",
"0,0000001C667479704D534E56012900464D534E566D703432",
"4,6674797033677035",
"4,667479704D534E56",
"4,6674797069736F6D"
],
"mime": "video/mp4"
},
"m4v": {
"signs": [
"0,00000018667479706D703432",
"0,00000020667479704D345620",
"4,667479706D703432"
],
"mime": "video/mp4"
},
"mpeg": {
"signs": [
"0,00000100",
"0,FFD8"
],
"mime": "video/mpeg"
},
"mpg": {
"signs": [
"0,00000100",
"0,000001BA",
"0,FFD8"
],
"mime": "video/mpeg"
},
"ogv": {
"signs": [
"0,4F67675300020000000000000000"
],
"mime": "video/ogg"
},
"mov": {
"signs": [
"0,00",
"0,000000146674797071742020",
"4,6674797071742020",
"4,6D6F6F76"
],
"mime": "video/quicktime"
},
"cpt": {
"signs": [
"0,4350543746494C45",
"0,43505446494C45"
],
"mime": "application/mac-compactpro"
},
"sxc": {
"signs": [
"0,504B0304",
"0,504B0304"
],
"mime": "application/vnd.sun.xml.calc"
},
"sxd": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.sun.xml.draw"
},
"sxi": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.sun.xml.impress"
},
"sxw": {
"signs": [
"0,504B0304"
],
"mime": "application/vnd.sun.xml.writer"
},
"bz2": {
"signs": [
"0,425A68"
],
"mime": "application/x-bzip2"
},
"vcd": {
"signs": [
"0,454E5452595643440200000102001858"
],
"mime": "application/x-cdlink"
},
"csh": {
"signs": [
"0,6375736800000002000000"
],
"mime": "application/x-csh"
},
"spl": {
"signs": [
"0,00000100"
],
"mime": "application/x-futuresplash"
},
"jar": {
"signs": [
"0,4A4152435300",
"0,504B0304",
"0,504B0304140008000800",
"0,5F27A889"
],
"mime": "application/x-java-archive"
},
"rpm": {
"signs": [
"0,EDABEEDB"
],
"mime": "application/x-rpm"
},
"swf": {
"signs": [
"0,435753",
"0,465753",
"0,5A5753"
],
"mime": "application/x-shockwave-flash"
},
"sit": {
"signs": [
"0,5349542100",
"0,5374756666497420286329313939372D"
],
"mime": "application/x-stuffit"
},
"tar": {
"signs": [
"257,7573746172"
],
"mime": "application/x-tar"
},
"xpi": {
"signs": [
"0,504B0304"
],
"mime": "application/x-xpinstall"
},
"xz": {
"signs": [
"0,FD377A585A00"
],
"mime": "application/x-xz"
},
"mid": {
"signs": [
"0,4D546864"
],
"mime": "audio/midi"
},
"midi": {
"signs": [
"0,4D546864"
],
"mime": "audio/midi"
},
"aiff": {
"signs": [
"0,464F524D00"
],
"mime": "audio/x-aiff"
},
"flac": {
"signs": [
"0,664C614300000022"
],
"mime": "audio/x-flac"
},
"wma": {
"signs": [
"0,3026B2758E66CF11A6D900AA0062CE6C"
],
"mime": "audio/x-ms-wma"
},
"ram": {
"signs": [
"0,727473703A2F2F"
],
"mime": "audio/x-pn-realaudio"
},
"rm": {
"signs": [
"0,2E524D46"
],
"mime": "audio/x-pn-realaudio"
},
"ra": {
"signs": [
"0,2E524D460000001200",
"0,2E7261FD00"
],
"mime": "audio/x-realaudio"
},
"wav": {
"signs": [
"0,52494646"
],
"mime": "audio/x-wav"
},
"webp": {
"signs": [
"0,52494646"
],
"mime": "image/webp"
},
"pgm": {
"signs": [
"0,50350A"
],
"mime": "image/x-portable-graymap"
},
"rgb": {
"signs": [
"0,01DA01010003"
],
"mime": "image/x-rgb"
},
"webm": {
"signs": [
"0,1A45DFA3"
],
"mime": "video/webm"
},
"flv": {
"signs": [
"0,00000020667479704D345620",
"0,464C5601"
],
"mime": "video/x-flv"
},
"mkv": {
"signs": [
"0,1A45DFA3"
],
"mime": "video/x-matroska"
},
"asx": {
"signs": [
"0,3C"
],
"mime": "video/x-ms-asf"
},
"wmv": {
"signs": [
"0,3026B2758E66CF11A6D900AA0062CE6C"
],
"mime": "video/x-ms-wmv"
},
"avi": {
"signs": [
"0,52494646"
],
"mime": "video/x-msvideo"
}
}
@liux-pro
Copy link

liux-pro commented Feb 2, 2022

Hi @qti3e
I found there are some repeats in signs , such as jpg, where 0,FFD8 repeat 4 times.

    "jpg": {
        "signs": [
            "0,FFD8",
            "0,FFD8",
            "0,FFD8",
            "0,FFD8"
        ],
        "mime": "image/jpeg"
    },

@Benzolio
Copy link

Hey! This is cool! I was about to start putting something like this together based on https://en.wikipedia.org/wiki/List_of_file_signatures. I did notice there are some more signatures on the wikipedia article that are not on https://www.garykessler.net/library/file_sigs.html
For example, two alternative signatures for mp3 of FF F2 and FF F3, so I think "mp3" could be extended to:

    "mp3": {
        "signs": [
            "0,494433",
            "0,FFFB",
            "0,FFF2",
            "0,FFF3"
        ],
        "mime": "audio/mpeg"
    },

Thanks for cross-referencing these!

@jgladen
Copy link

jgladen commented Jul 5, 2022

for eml I have also found: "Return-path: " in addition to "Return-Path: "

   "eml": {
        "signs": [
            "0,46726F6D3A20",
            "0,52657475726E2D506174683A20",
            "0,52657475726E2D706174683A20",
            "0,582D"
        ],
        "mime": "message/rfc822"
    },

@nvzavi
Copy link

nvzavi commented Sep 22, 2022 •
edited
Loading

Thanks. This is really cool. I am also using this in my project now. I will credit you in my code and readme.md - link to this gist. Thanks again

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment