File extensions to mime formats. JSON format. Converted from https://gist.github.com/nimasdj/801b0b1a50112ea6a997 (version from 16 November 2015)

ext_to_mimetype.json

{
    "123": [
        "application/vnd.lotus-1-2-3"
    ], 
    "3dm": [
        "x-world/x-3dmf"
    ], 
    "3dmf": [
        "x-world/x-3dmf"
    ], 
    "3dml": [
        "text/vnd.in3d.3dml"
    ], 
    "3ds": [
        "image/x-3ds"
    ], 
    "3g2": [
        "video/3gpp2"
    ], 
    "3gp": [
        "video/3gpp"
    ], 
    "7z": [
        "application/x-7z-compressed"
    ], 
    "a": [
        "application/octet-stream"
    ], 
    "aab": [
        "application/x-authorware-bin"
    ], 
    "aac": [
        "audio/x-aac"
    ], 
    "aam": [
        "application/x-authorware-map"
    ], 
    "aas": [
        "application/x-authorware-seg"
    ], 
    "abc": [
        "text/vnd.abc"
    ], 
    "abw": [
        "application/x-abiword"
    ], 
    "ac": [
        "application/pkix-attr-cert"
    ], 
    "acc": [
        "application/vnd.americandynamics.acc"
    ], 
    "ace": [
        "application/x-ace-compressed"
    ], 
    "acgi": [
        "text/html"
    ], 
    "acu": [
        "application/vnd.acucobol"
    ], 
    "acutc": [
        "application/vnd.acucorp"
    ], 
    "adp": [
        "audio/adpcm"
    ], 
    "aep": [
        "application/vnd.audiograph"
    ], 
    "afl": [
        "video/animaflex"
    ], 
    "afm": [
        "application/x-font-type1"
    ], 
    "afp": [
        "application/vnd.ibm.modcap"
    ], 
    "ahead": [
        "application/vnd.ahead.space"
    ], 
    "ai": [
        "application/postscript"
    ], 
    "aif": [
        "audio/aiff", 
        "audio/x-aiff"
    ], 
    "aifc": [
        "audio/aiff", 
        "audio/x-aiff"
    ], 
    "aiff": [
        "audio/aiff", 
        "audio/x-aiff"
    ], 
    "aim": [
        "application/x-aim"
    ], 
    "aip": [
        "text/x-audiosoft-intra"
    ], 
    "air": [
        "application/vnd.adobe.air-application-installer-package+zip"
    ], 
    "ait": [
        "application/vnd.dvb.ait"
    ], 
    "ami": [
        "application/vnd.amiga.ami"
    ], 
    "ani": [
        "application/x-navi-animation"
    ], 
    "aos": [
        "application/x-nokia-9000-communicator-add-on-software"
    ], 
    "apk": [
        "application/vnd.android.package-archive"
    ], 
    "appcache": [
        "text/cache-manifest"
    ], 
    "application": [
        "application/x-ms-application"
    ], 
    "apr": [
        "application/vnd.lotus-approach"
    ], 
    "aps": [
        "application/mime"
    ], 
    "arc": [
        "application/x-freearc"
    ], 
    "arj": [
        "application/arj", 
        "application/octet-stream"
    ], 
    "art": [
        "image/x-jg"
    ], 
    "asc": [
        "application/pgp-signature"
    ], 
    "asf": [
        "video/x-ms-asf"
    ], 
    "asm": [
        "text/x-asm"
    ], 
    "aso": [
        "application/vnd.accpac.simply.aso"
    ], 
    "asp": [
        "text/asp"
    ], 
    "asx": [
        "application/x-mplayer2", 
        "video/x-ms-asf", 
        "video/x-ms-asf-plugin"
    ], 
    "atc": [
        "application/vnd.acucorp"
    ], 
    "atom": [
        "application/atom+xml"
    ], 
    "atomcat": [
        "application/atomcat+xml"
    ], 
    "atomsvc": [
        "application/atomsvc+xml"
    ], 
    "atx": [
        "application/vnd.antix.game-component"
    ], 
    "au": [
        "audio/basic"
    ], 
    "avi": [
        "application/x-troff-msvideo", 
        "video/avi", 
        "video/msvideo", 
        "video/x-msvideo"
    ], 
    "avs": [
        "video/avs-video"
    ], 
    "aw": [
        "application/applixware"
    ], 
    "azf": [
        "application/vnd.airzip.filesecure.azf"
    ], 
    "azs": [
        "application/vnd.airzip.filesecure.azs"
    ], 
    "azw": [
        "application/vnd.amazon.ebook"
    ], 
    "bat": [
        "application/x-msdownload"
    ], 
    "bcpio": [
        "application/x-bcpio"
    ], 
    "bdf": [
        "application/x-font-bdf"
    ], 
    "bdm": [
        "application/vnd.syncml.dm+wbxml"
    ], 
    "bed": [
        "application/vnd.realvnc.bed"
    ], 
    "bh2": [
        "application/vnd.fujitsu.oasysprs"
    ], 
    "bin": [
        "application/mac-binary", 
        "application/macbinary", 
        "application/octet-stream", 
        "application/x-binary", 
        "application/x-macbinary"
    ], 
    "blb": [
        "application/x-blorb"
    ], 
    "blorb": [
        "application/x-blorb"
    ], 
    "bm": [
        "image/bmp"
    ], 
    "bmi": [
        "application/vnd.bmi"
    ], 
    "bmp": [
        "image/bmp", 
        "image/x-windows-bmp"
    ], 
    "boo": [
        "application/book"
    ], 
    "book": [
        "application/vnd.framemaker"
    ], 
    "box": [
        "application/vnd.previewsystems.box"
    ], 
    "boz": [
        "application/x-bzip2"
    ], 
    "bpk": [
        "application/octet-stream"
    ], 
    "bsh": [
        "application/x-bsh"
    ], 
    "btif": [
        "image/prs.btif"
    ], 
    "buffer": [
        "application/octet-stream"
    ], 
    "bz": [
        "application/x-bzip"
    ], 
    "bz2": [
        "application/x-bzip2"
    ], 
    "c": [
        "text/x-c"
    ], 
    "c++": [
        "text/plain"
    ], 
    "c11amc": [
        "application/vnd.cluetrust.cartomobile-config"
    ], 
    "c11amz": [
        "application/vnd.cluetrust.cartomobile-config-pkg"
    ], 
    "c4d": [
        "application/vnd.clonk.c4group"
    ], 
    "c4f": [
        "application/vnd.clonk.c4group"
    ], 
    "c4g": [
        "application/vnd.clonk.c4group"
    ], 
    "c4p": [
        "application/vnd.clonk.c4group"
    ], 
    "c4u": [
        "application/vnd.clonk.c4group"
    ], 
    "cab": [
        "application/vnd.ms-cab-compressed"
    ], 
    "caf": [
        "audio/x-caf"
    ], 
    "cap": [
        "application/vnd.tcpdump.pcap"
    ], 
    "car": [
        "application/vnd.curl.car"
    ], 
    "cat": [
        "application/vnd.ms-pki.seccat"
    ], 
    "cb7": [
        "application/x-cbr"
    ], 
    "cba": [
        "application/x-cbr"
    ], 
    "cbr": [
        "application/x-cbr"
    ], 
    "cbt": [
        "application/x-cbr"
    ], 
    "cbz": [
        "application/x-cbr"
    ], 
    "cc": [
        "text/plain", 
        "text/x-c"
    ], 
    "ccad": [
        "application/clariscad"
    ], 
    "cco": [
        "application/x-cocoa"
    ], 
    "cct": [
        "application/x-director"
    ], 
    "ccxml": [
        "application/ccxml+xml"
    ], 
    "cdbcmsg": [
        "application/vnd.contact.cmsg"
    ], 
    "cdf": [
        "application/cdf", 
        "application/x-cdf", 
        "application/x-netcdf"
    ], 
    "cdkey": [
        "application/vnd.mediastation.cdkey"
    ], 
    "cdmia": [
        "application/cdmi-capability"
    ], 
    "cdmic": [
        "application/cdmi-container"
    ], 
    "cdmid": [
        "application/cdmi-domain"
    ], 
    "cdmio": [
        "application/cdmi-object"
    ], 
    "cdmiq": [
        "application/cdmi-queue"
    ], 
    "cdx": [
        "chemical/x-cdx"
    ], 
    "cdxml": [
        "application/vnd.chemdraw+xml"
    ], 
    "cdy": [
        "application/vnd.cinderella"
    ], 
    "cer": [
        "application/pkix-cert", 
        "application/x-x509-ca-cert"
    ], 
    "cfs": [
        "application/x-cfs-compressed"
    ], 
    "cgm": [
        "image/cgm"
    ], 
    "cha": [
        "application/x-chat"
    ], 
    "chat": [
        "application/x-chat"
    ], 
    "chm": [
        "application/vnd.ms-htmlhelp"
    ], 
    "chrt": [
        "application/vnd.kde.kchart"
    ], 
    "cif": [
        "chemical/x-cif"
    ], 
    "cii": [
        "application/vnd.anser-web-certificate-issue-initiation"
    ], 
    "cil": [
        "application/vnd.ms-artgalry"
    ], 
    "cla": [
        "application/vnd.claymore"
    ], 
    "class": [
        "application/java", 
        "application/java-byte-code", 
        "application/x-java-class"
    ], 
    "clkk": [
        "application/vnd.crick.clicker.keyboard"
    ], 
    "clkp": [
        "application/vnd.crick.clicker.palette"
    ], 
    "clkt": [
        "application/vnd.crick.clicker.template"
    ], 
    "clkw": [
        "application/vnd.crick.clicker.wordbank"
    ], 
    "clkx": [
        "application/vnd.crick.clicker"
    ], 
    "clp": [
        "application/x-msclip"
    ], 
    "cmc": [
        "application/vnd.cosmocaller"
    ], 
    "cmdf": [
        "chemical/x-cmdf"
    ], 
    "cml": [
        "chemical/x-cml"
    ], 
    "cmp": [
        "application/vnd.yellowriver-custom-menu"
    ], 
    "cmx": [
        "image/x-cmx"
    ], 
    "cod": [
        "application/vnd.rim.cod"
    ], 
    "com": [
        "application/octet-stream", 
        "text/plain"
    ], 
    "conf": [
        "text/plain"
    ], 
    "cpio": [
        "application/x-cpio"
    ], 
    "cpp": [
        "text/x-c"
    ], 
    "cpt": [
        "application/x-compactpro", 
        "application/x-cpt"
    ], 
    "crd": [
        "application/x-mscardfile"
    ], 
    "crl": [
        "application/pkcs-crl", 
        "application/pkix-crl"
    ], 
    "crt": [
        "application/pkix-cert", 
        "application/x-x509-ca-cert", 
        "application/x-x509-user-cert"
    ], 
    "crx": [
        "application/x-chrome-extension"
    ], 
    "cryptonote": [
        "application/vnd.rig.cryptonote"
    ], 
    "csh": [
        "application/x-csh", 
        "text/x-script.csh"
    ], 
    "csml": [
        "chemical/x-csml"
    ], 
    "csp": [
        "application/vnd.commonspace"
    ], 
    "css": [
        "application/x-pointplus", 
        "text/css"
    ], 
    "cst": [
        "application/x-director"
    ], 
    "csv": [
        "text/csv"
    ], 
    "cu": [
        "application/cu-seeme"
    ], 
    "curl": [
        "text/vnd.curl"
    ], 
    "cww": [
        "application/prs.cww"
    ], 
    "cxt": [
        "application/x-director"
    ], 
    "cxx": [
        "text/x-c"
    ], 
    "dae": [
        "model/vnd.collada+xml"
    ], 
    "daf": [
        "application/vnd.mobius.daf"
    ], 
    "dart": [
        "application/vnd.dart"
    ], 
    "dataless": [
        "application/vnd.fdsn.seed"
    ], 
    "davmount": [
        "application/davmount+xml"
    ], 
    "dbk": [
        "application/docbook+xml"
    ], 
    "dcr": [
        "application/x-director"
    ], 
    "dcurl": [
        "text/vnd.curl.dcurl"
    ], 
    "dd2": [
        "application/vnd.oma.dd2+xml"
    ], 
    "ddd": [
        "application/vnd.fujixerox.ddd"
    ], 
    "deb": [
        "application/x-debian-package"
    ], 
    "deepv": [
        "application/x-deepv"
    ], 
    "def": [
        "text/plain"
    ], 
    "deploy": [
        "application/octet-stream"
    ], 
    "der": [
        "application/x-x509-ca-cert"
    ], 
    "dfac": [
        "application/vnd.dreamfactory"
    ], 
    "dgc": [
        "application/x-dgc-compressed"
    ], 
    "dic": [
        "text/x-c"
    ], 
    "dif": [
        "video/x-dv"
    ], 
    "diff": [
        "text/plain"
    ], 
    "dir": [
        "application/x-director"
    ], 
    "dis": [
        "application/vnd.mobius.dis"
    ], 
    "dist": [
        "application/octet-stream"
    ], 
    "distz": [
        "application/octet-stream"
    ], 
    "djv": [
        "image/vnd.djvu"
    ], 
    "djvu": [
        "image/vnd.djvu"
    ], 
    "dl": [
        "video/dl", 
        "video/x-dl"
    ], 
    "dll": [
        "application/x-msdownload"
    ], 
    "dmg": [
        "application/x-apple-diskimage"
    ], 
    "dmp": [
        "application/vnd.tcpdump.pcap"
    ], 
    "dms": [
        "application/octet-stream"
    ], 
    "dna": [
        "application/vnd.dna"
    ], 
    "doc": [
        "application/msword"
    ], 
    "docm": [
        "application/vnd.ms-word.document.macroenabled.12"
    ], 
    "docx": [
        "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
    ], 
    "dot": [
        "application/msword"
    ], 
    "dotm": [
        "application/vnd.ms-word.template.macroenabled.12"
    ], 
    "dotx": [
        "application/vnd.openxmlformats-officedocument.wordprocessingml.template"
    ], 
    "dp": [
        "application/vnd.osgi.dp"
    ], 
    "dpg": [
        "application/vnd.dpgraph"
    ], 
    "dra": [
        "audio/vnd.dra"
    ], 
    "drw": [
        "application/drafting"
    ], 
    "dsc": [
        "text/prs.lines.tag"
    ], 
    "dssc": [
        "application/dssc+der"
    ], 
    "dtb": [
        "application/x-dtbook+xml"
    ], 
    "dtd": [
        "application/xml-dtd"
    ], 
    "dts": [
        "audio/vnd.dts"
    ], 
    "dtshd": [
        "audio/vnd.dts.hd"
    ], 
    "dump": [
        "application/octet-stream"
    ], 
    "dv": [
        "video/x-dv"
    ], 
    "dvb": [
        "video/vnd.dvb.file"
    ], 
    "dvi": [
        "application/x-dvi"
    ], 
    "dwf": [
        "drawing/x-dwf (old)", 
        "model/vnd.dwf"
    ], 
    "dwg": [
        "application/acad", 
        "image/vnd.dwg", 
        "image/x-dwg"
    ], 
    "dxf": [
        "image/vnd.dxf"
    ], 
    "dxp": [
        "application/vnd.spotfire.dxp"
    ], 
    "dxr": [
        "application/x-director"
    ], 
    "ecelp4800": [
        "audio/vnd.nuera.ecelp4800"
    ], 
    "ecelp7470": [
        "audio/vnd.nuera.ecelp7470"
    ], 
    "ecelp9600": [
        "audio/vnd.nuera.ecelp9600"
    ], 
    "ecma": [
        "application/ecmascript"
    ], 
    "edm": [
        "application/vnd.novadigm.edm"
    ], 
    "edx": [
        "application/vnd.novadigm.edx"
    ], 
    "efif": [
        "application/vnd.picsel"
    ], 
    "ei6": [
        "application/vnd.pg.osasli"
    ], 
    "el": [
        "text/x-script.elisp"
    ], 
    "elc": [
        "application/x-bytecode.elisp (compiled elisp)", 
        "application/x-elc"
    ], 
    "emf": [
        "application/x-msmetafile"
    ], 
    "eml": [
        "message/rfc822"
    ], 
    "emma": [
        "application/emma+xml"
    ], 
    "emz": [
        "application/x-msmetafile"
    ], 
    "env": [
        "application/x-envoy"
    ], 
    "eol": [
        "audio/vnd.digital-winds"
    ], 
    "eot": [
        "application/vnd.ms-fontobject"
    ], 
    "eps": [
        "application/postscript"
    ], 
    "epub": [
        "application/epub+zip"
    ], 
    "es": [
        "application/x-esrehber"
    ], 
    "es3": [
        "application/vnd.eszigno3+xml"
    ], 
    "esa": [
        "application/vnd.osgi.subsystem"
    ], 
    "esf": [
        "application/vnd.epson.esf"
    ], 
    "et3": [
        "application/vnd.eszigno3+xml"
    ], 
    "etx": [
        "text/x-setext"
    ], 
    "eva": [
        "application/x-eva"
    ], 
    "event-stream": [
        "text/event-stream"
    ], 
    "evy": [
        "application/envoy", 
        "application/x-envoy"
    ], 
    "exe": [
        "application/x-msdownload"
    ], 
    "exi": [
        "application/exi"
    ], 
    "ext": [
        "application/vnd.novadigm.ext"
    ], 
    "ez": [
        "application/andrew-inset"
    ], 
    "ez2": [
        "application/vnd.ezpix-album"
    ], 
    "ez3": [
        "application/vnd.ezpix-package"
    ], 
    "f": [
        "text/plain", 
        "text/x-fortran"
    ], 
    "f4v": [
        "video/x-f4v"
    ], 
    "f77": [
        "text/x-fortran"
    ], 
    "f90": [
        "text/plain", 
        "text/x-fortran"
    ], 
    "fbs": [
        "image/vnd.fastbidsheet"
    ], 
    "fcdt": [
        "application/vnd.adobe.formscentral.fcdt"
    ], 
    "fcs": [
        "application/vnd.isac.fcs"
    ], 
    "fdf": [
        "application/vnd.fdf"
    ], 
    "fe_launch": [
        "application/vnd.denovo.fcselayout-link"
    ], 
    "fg5": [
        "application/vnd.fujitsu.oasysgp"
    ], 
    "fgd": [
        "application/x-director"
    ], 
    "fh": [
        "image/x-freehand"
    ], 
    "fh4": [
        "image/x-freehand"
    ], 
    "fh5": [
        "image/x-freehand"
    ], 
    "fh7": [
        "image/x-freehand"
    ], 
    "fhc": [
        "image/x-freehand"
    ], 
    "fif": [
        "application/fractals", 
        "image/fif"
    ], 
    "fig": [
        "application/x-xfig"
    ], 
    "flac": [
        "audio/flac"
    ], 
    "fli": [
        "video/fli", 
        "video/x-fli"
    ], 
    "flo": [
        "application/vnd.micrografx.flo"
    ], 
    "flv": [
        "video/x-flv"
    ], 
    "flw": [
        "application/vnd.kde.kivio"
    ], 
    "flx": [
        "text/vnd.fmi.flexstor"
    ], 
    "fly": [
        "text/vnd.fly"
    ], 
    "fm": [
        "application/vnd.framemaker"
    ], 
    "fmf": [
        "video/x-atomic3d-feature"
    ], 
    "fnc": [
        "application/vnd.frogans.fnc"
    ], 
    "for": [
        "text/plain", 
        "text/x-fortran"
    ], 
    "fpx": [
        "image/vnd.fpx", 
        "image/vnd.net-fpx"
    ], 
    "frame": [
        "application/vnd.framemaker"
    ], 
    "frl": [
        "application/freeloader"
    ], 
    "fsc": [
        "application/vnd.fsc.weblaunch"
    ], 
    "fst": [
        "image/vnd.fst"
    ], 
    "ftc": [
        "application/vnd.fluxtime.clip"
    ], 
    "fti": [
        "application/vnd.anser-web-funds-transfer-initiation"
    ], 
    "funk": [
        "audio/make"
    ], 
    "fvt": [
        "video/vnd.fvt"
    ], 
    "fxp": [
        "application/vnd.adobe.fxp"
    ], 
    "fxpl": [
        "application/vnd.adobe.fxp"
    ], 
    "fzs": [
        "application/vnd.fuzzysheet"
    ], 
    "g": [
        "text/plain"
    ], 
    "g2w": [
        "application/vnd.geoplan"
    ], 
    "g3": [
        "image/g3fax"
    ], 
    "g3w": [
        "application/vnd.geospace"
    ], 
    "gac": [
        "application/vnd.groove-account"
    ], 
    "gam": [
        "application/x-tads"
    ], 
    "gbr": [
        "application/rpki-ghostbusters"
    ], 
    "gca": [
        "application/x-gca-compressed"
    ], 
    "gdl": [
        "model/vnd.gdl"
    ], 
    "geo": [
        "application/vnd.dynageo"
    ], 
    "gex": [
        "application/vnd.geometry-explorer"
    ], 
    "ggb": [
        "application/vnd.geogebra.file"
    ], 
    "ggt": [
        "application/vnd.geogebra.tool"
    ], 
    "ghf": [
        "application/vnd.groove-help"
    ], 
    "gif": [
        "image/gif"
    ], 
    "gim": [
        "application/vnd.groove-identity-message"
    ], 
    "gl": [
        "video/gl", 
        "video/x-gl"
    ], 
    "gml": [
        "application/gml+xml"
    ], 
    "gmx": [
        "application/vnd.gmx"
    ], 
    "gnumeric": [
        "application/x-gnumeric"
    ], 
    "gph": [
        "application/vnd.flographit"
    ], 
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        "image/x-cmu-raster"
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        "application/resource-lists-diff+xml"
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        "audio/x-pn-realaudio"
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        "audio/x-pn-realaudio-plugin"
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        "application/vnd.nokia.ringing-tone"
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    ], 
    "sxg": [
        "application/vnd.sun.xml.writer.global"
    ], 
    "sxi": [
        "application/vnd.sun.xml.impress"
    ], 
    "sxm": [
        "application/vnd.sun.xml.math"
    ], 
    "sxw": [
        "application/vnd.sun.xml.writer"
    ], 
    "t": [
        "text/troff"
    ], 
    "t3": [
        "application/x-t3vm-image"
    ], 
    "taglet": [
        "application/vnd.mynfc"
    ], 
    "talk": [
        "text/x-speech"
    ], 
    "tao": [
        "application/vnd.tao.intent-module-archive"
    ], 
    "tar": [
        "application/x-tar"
    ], 
    "tbk": [
        "application/toolbook", 
        "application/x-tbook"
    ], 
    "tcap": [
        "application/vnd.3gpp2.tcap"
    ], 
    "tcl": [
        "application/x-tcl", 
        "text/x-script.tcl"
    ], 
    "tcsh": [
        "text/x-script.tcsh"
    ], 
    "teacher": [
        "application/vnd.smart.teacher"
    ], 
    "tei": [
        "application/tei+xml"
    ], 
    "teicorpus": [
        "application/tei+xml"
    ], 
    "tex": [
        "application/x-tex"
    ], 
    "texi": [
        "application/x-texinfo"
    ], 
    "texinfo": [
        "application/x-texinfo"
    ], 
    "text": [
        "application/plain", 
        "text/plain"
    ], 
    "tfi": [
        "application/thraud+xml"
    ], 
    "tfm": [
        "application/x-tex-tfm"
    ], 
    "tga": [
        "image/x-tga"
    ], 
    "tgz": [
        "application/gnutar", 
        "application/x-compressed"
    ], 
    "thmx": [
        "application/vnd.ms-officetheme"
    ], 
    "tif": [
        "image/tiff", 
        "image/x-tiff"
    ], 
    "tiff": [
        "image/tiff", 
        "image/x-tiff"
    ], 
    "tmo": [
        "application/vnd.tmobile-livetv"
    ], 
    "torrent": [
        "application/x-bittorrent"
    ], 
    "tpl": [
        "application/vnd.groove-tool-template"
    ], 
    "tpt": [
        "application/vnd.trid.tpt"
    ], 
    "tr": [
        "text/troff"
    ], 
    "tra": [
        "application/vnd.trueapp"
    ], 
    "trm": [
        "application/x-msterminal"
    ], 
    "ts": [
        "video/MP2T"
    ], 
    "tsd": [
        "application/timestamped-data"
    ], 
    "tsi": [
        "audio/tsp-audio"
    ], 
    "tsp": [
        "application/dsptype", 
        "audio/tsplayer"
    ], 
    "tsv": [
        "text/tab-separated-values"
    ], 
    "ttc": [
        "application/x-font-ttf"
    ], 
    "ttf": [
        "application/x-font-ttf"
    ], 
    "ttl": [
        "text/turtle"
    ], 
    "turbot": [
        "image/florian"
    ], 
    "twd": [
        "application/vnd.simtech-mindmapper"
    ], 
    "twds": [
        "application/vnd.simtech-mindmapper"
    ], 
    "txd": [
        "application/vnd.genomatix.tuxedo"
    ], 
    "txf": [
        "application/vnd.mobius.txf"
    ], 
    "txt": [
        "text/plain"
    ], 
    "u32": [
        "application/x-authorware-bin"
    ], 
    "udeb": [
        "application/x-debian-package"
    ], 
    "ufd": [
        "application/vnd.ufdl"
    ], 
    "ufdl": [
        "application/vnd.ufdl"
    ], 
    "uil": [
        "text/x-uil"
    ], 
    "ulx": [
        "application/x-glulx"
    ], 
    "umj": [
        "application/vnd.umajin"
    ], 
    "uni": [
        "text/uri-list"
    ], 
    "unis": [
        "text/uri-list"
    ], 
    "unityweb": [
        "application/vnd.unity"
    ], 
    "unv": [
        "application/i-deas"
    ], 
    "uoml": [
        "application/vnd.uoml+xml"
    ], 
    "uri": [
        "text/uri-list"
    ], 
    "uris": [
        "text/uri-list"
    ], 
    "urls": [
        "text/uri-list"
    ], 
    "ustar": [
        "application/x-ustar", 
        "multipart/x-ustar"
    ], 
    "utz": [
        "application/vnd.uiq.theme"
    ], 
    "uu": [
        "application/octet-stream", 
        "text/x-uuencode"
    ], 
    "uue": [
        "text/x-uuencode"
    ], 
    "uva": [
        "audio/vnd.dece.audio"
    ], 
    "uvd": [
        "application/vnd.dece.data"
    ], 
    "uvf": [
        "application/vnd.dece.data"
    ], 
    "uvg": [
        "image/vnd.dece.graphic"
    ], 
    "uvh": [
        "video/vnd.dece.hd"
    ], 
    "uvi": [
        "image/vnd.dece.graphic"
    ], 
    "uvm": [
        "video/vnd.dece.mobile"
    ], 
    "uvp": [
        "video/vnd.dece.pd"
    ], 
    "uvs": [
        "video/vnd.dece.sd"
    ], 
    "uvt": [
        "application/vnd.dece.ttml+xml"
    ], 
    "uvu": [
        "video/vnd.uvvu.mp4"
    ], 
    "uvv": [
        "video/vnd.dece.video"
    ], 
    "uvva": [
        "audio/vnd.dece.audio"
    ], 
    "uvvd": [
        "application/vnd.dece.data"
    ], 
    "uvvf": [
        "application/vnd.dece.data"
    ], 
    "uvvg": [
        "image/vnd.dece.graphic"
    ], 
    "uvvh": [
        "video/vnd.dece.hd"
    ], 
    "uvvi": [
        "image/vnd.dece.graphic"
    ], 
    "uvvm": [
        "video/vnd.dece.mobile"
    ], 
    "uvvp": [
        "video/vnd.dece.pd"
    ], 
    "uvvs": [
        "video/vnd.dece.sd"
    ], 
    "uvvt": [
        "application/vnd.dece.ttml+xml"
    ], 
    "uvvu": [
        "video/vnd.uvvu.mp4"
    ], 
    "uvvv": [
        "video/vnd.dece.video"
    ], 
    "uvvx": [
        "application/vnd.dece.unspecified"
    ], 
    "uvvz": [
        "application/vnd.dece.zip"
    ], 
    "uvx": [
        "application/vnd.dece.unspecified"
    ], 
    "uvz": [
        "application/vnd.dece.zip"
    ], 
    "vcard": [
        "text/vcard"
    ], 
    "vcd": [
        "application/x-cdlink"
    ], 
    "vcf": [
        "text/x-vcard"
    ], 
    "vcg": [
        "application/vnd.groove-vcard"
    ], 
    "vcs": [
        "text/x-vcalendar"
    ], 
    "vcx": [
        "application/vnd.vcx"
    ], 
    "vda": [
        "application/vda"
    ], 
    "vdo": [
        "video/vdo"
    ], 
    "vew": [
        "application/groupwise"
    ], 
    "vis": [
        "application/vnd.visionary"
    ], 
    "viv": [
        "video/vivo", 
        "video/vnd.vivo"
    ], 
    "vivo": [
        "video/vivo", 
        "video/vnd.vivo"
    ], 
    "vmd": [
        "application/vocaltec-media-desc"
    ], 
    "vmf": [
        "application/vocaltec-media-file"
    ], 
    "vob": [
        "video/x-ms-vob"
    ], 
    "voc": [
        "audio/voc", 
        "audio/x-voc"
    ], 
    "vor": [
        "application/vnd.stardivision.writer"
    ], 
    "vos": [
        "video/vosaic"
    ], 
    "vox": [
        "application/x-authorware-bin"
    ], 
    "vqe": [
        "audio/x-twinvq-plugin"
    ], 
    "vqf": [
        "audio/x-twinvq"
    ], 
    "vql": [
        "audio/x-twinvq-plugin"
    ], 
    "vrml": [
        "application/x-vrml", 
        "model/vrml", 
        "x-world/x-vrml"
    ], 
    "vrt": [
        "x-world/x-vrt"
    ], 
    "vsd": [
        "application/vnd.visio"
    ], 
    "vsf": [
        "application/vnd.vsf"
    ], 
    "vss": [
        "application/vnd.visio"
    ], 
    "vst": [
        "application/vnd.visio"
    ], 
    "vsw": [
        "application/vnd.visio"
    ], 
    "vtt": [
        "text/vtt"
    ], 
    "vtu": [
        "model/vnd.vtu"
    ], 
    "vxml": [
        "application/voicexml+xml"
    ], 
    "w3d": [
        "application/x-director"
    ], 
    "w60": [
        "application/wordperfect6.0"
    ], 
    "w61": [
        "application/wordperfect6.1"
    ], 
    "w6w": [
        "application/msword"
    ], 
    "wad": [
        "application/x-doom"
    ], 
    "wav": [
        "audio/wav", 
        "audio/x-wav"
    ], 
    "wax": [
        "audio/x-ms-wax"
    ], 
    "wb1": [
        "application/x-qpro"
    ], 
    "wbmp": [
        "image/vnd.wap.wbmp"
    ], 
    "wbs": [
        "application/vnd.criticaltools.wbs+xml"
    ], 
    "wbxml": [
        "application/vnd.wap.wbxml"
    ], 
    "wcm": [
        "application/vnd.ms-works"
    ], 
    "wdb": [
        "application/vnd.ms-works"
    ], 
    "wdp": [
        "image/vnd.ms-photo"
    ], 
    "web": [
        "application/vnd.xara"
    ], 
    "weba": [
        "audio/webm"
    ], 
    "webapp": [
        "application/x-web-app-manifest+json"
    ], 
    "webm": [
        "video/webm"
    ], 
    "webp": [
        "image/webp"
    ], 
    "wg": [
        "application/vnd.pmi.widget"
    ], 
    "wgt": [
        "application/widget"
    ], 
    "wiz": [
        "application/msword"
    ], 
    "wk1": [
        "application/x-123"
    ], 
    "wks": [
        "application/vnd.ms-works"
    ], 
    "wm": [
        "video/x-ms-wm"
    ], 
    "wma": [
        "audio/x-ms-wma"
    ], 
    "wmd": [
        "application/x-ms-wmd"
    ], 
    "wmf": [
        "application/x-msmetafile"
    ], 
    "wml": [
        "text/vnd.wap.wml"
    ], 
    "wmlc": [
        "application/vnd.wap.wmlc"
    ], 
    "wmls": [
        "text/vnd.wap.wmlscript"
    ], 
    "wmlsc": [
        "application/vnd.wap.wmlscriptc"
    ], 
    "wmv": [
        "video/x-ms-wmv"
    ], 
    "wmx": [
        "video/x-ms-wmx"
    ], 
    "wmz": [
        "application/x-msmetafile"
    ], 
    "woff": [
        "application/x-font-woff"
    ], 
    "word": [
        "application/msword"
    ], 
    "wp": [
        "application/wordperfect"
    ], 
    "wp5": [
        "application/wordperfect", 
        "application/wordperfect6.0"
    ], 
    "wp6": [
        "application/wordperfect"
    ], 
    "wpd": [
        "application/wordperfect", 
        "application/x-wpwin"
    ], 
    "wpl": [
        "application/vnd.ms-wpl"
    ], 
    "wps": [
        "application/vnd.ms-works"
    ], 
    "wq1": [
        "application/x-lotus"
    ], 
    "wqd": [
        "application/vnd.wqd"
    ], 
    "wri": [
        "application/mswrite", 
        "application/x-wri"
    ], 
    "wrl": [
        "application/x-world", 
        "model/vrml", 
        "x-world/x-vrml"
    ], 
    "wrz": [
        "model/vrml", 
        "x-world/x-vrml"
    ], 
    "wsc": [
        "text/scriplet"
    ], 
    "wsdl": [
        "application/wsdl+xml"
    ], 
    "wspolicy": [
        "application/wspolicy+xml"
    ], 
    "wsrc": [
        "application/x-wais-source"
    ], 
    "wtb": [
        "application/vnd.webturbo"
    ], 
    "wtk": [
        "application/x-wintalk"
    ], 
    "wvx": [
        "video/x-ms-wvx"
    ], 
    "x-png": [
        "image/png"
    ], 
    "x32": [
        "application/x-authorware-bin"
    ], 
    "x3d": [
        "model/x3d+xml"
    ], 
    "x3db": [
        "model/x3d+binary"
    ], 
    "x3dbz": [
        "model/x3d+binary"
    ], 
    "x3dv": [
        "model/x3d+vrml"
    ], 
    "x3dvz": [
        "model/x3d+vrml"
    ], 
    "x3dz": [
        "model/x3d+xml"
    ], 
    "xaml": [
        "application/xaml+xml"
    ], 
    "xap": [
        "application/x-silverlight-app"
    ], 
    "xar": [
        "application/vnd.xara"
    ], 
    "xbap": [
        "application/x-ms-xbap"
    ], 
    "xbd": [
        "application/vnd.fujixerox.docuworks.binder"
    ], 
    "xbm": [
        "image/x-xbitmap", 
        "image/x-xbm", 
        "image/xbm"
    ], 
    "xdf": [
        "application/xcap-diff+xml"
    ], 
    "xdm": [
        "application/vnd.syncml.dm+xml"
    ], 
    "xdp": [
        "application/vnd.adobe.xdp+xml"
    ], 
    "xdr": [
        "video/x-amt-demorun"
    ], 
    "xdssc": [
        "application/dssc+xml"
    ], 
    "xdw": [
        "application/vnd.fujixerox.docuworks"
    ], 
    "xenc": [
        "application/xenc+xml"
    ], 
    "xer": [
        "application/patch-ops-error+xml"
    ], 
    "xfdf": [
        "application/vnd.adobe.xfdf"
    ], 
    "xfdl": [
        "application/vnd.xfdl"
    ], 
    "xgz": [
        "xgl/drawing"
    ], 
    "xht": [
        "application/xhtml+xml"
    ], 
    "xhtml": [
        "application/xhtml+xml"
    ], 
    "xhvml": [
        "application/xv+xml"
    ], 
    "xif": [
        "image/vnd.xiff"
    ], 
    "xl": [
        "application/excel"
    ], 
    "xla": [
        "application/excel", 
        "application/x-excel", 
        "application/x-msexcel"
    ], 
    "xlam": [
        "application/vnd.ms-excel.addin.macroenabled.12"
    ], 
    "xlb": [
        "application/excel", 
        "application/vnd.ms-excel", 
        "application/x-excel"
    ], 
    "xlc": [
        "application/excel", 
        "application/vnd.ms-excel", 
        "application/x-excel"
    ], 
    "xld": [
        "application/excel", 
        "application/x-excel"
    ], 
    "xlf": [
        "application/x-xliff+xml"
    ], 
    "xlk": [
        "application/excel", 
        "application/x-excel"
    ], 
    "xll": [
        "application/excel", 
        "application/vnd.ms-excel", 
        "application/x-excel"
    ], 
    "xlm": [
        "application/excel", 
        "application/vnd.ms-excel", 
        "application/x-excel"
    ], 
    "xls": [
        "application/excel", 
        "application/vnd.ms-excel", 
        "application/x-excel", 
        "application/x-msexcel"
    ], 
    "xlsb": [
        "application/vnd.ms-excel.sheet.binary.macroenabled.12"
    ], 
    "xlsm": [
        "application/vnd.ms-excel.sheet.macroenabled.12"
    ], 
    "xlsx": [
        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
    ], 
    "xlt": [
        "application/excel", 
        "application/x-excel"
    ], 
    "xltm": [
        "application/vnd.ms-excel.template.macroenabled.12"
    ], 
    "xltx": [
        "application/vnd.openxmlformats-officedocument.spreadsheetml.template"
    ], 
    "xlv": [
        "application/excel", 
        "application/x-excel"
    ], 
    "xlw": [
        "application/excel", 
        "application/vnd.ms-excel", 
        "application/x-excel", 
        "application/x-msexcel"
    ], 
    "xm": [
        "audio/xm"
    ], 
    "xml": [
        "application/xml", 
        "text/xml"
    ], 
    "xmz": [
        "xgl/movie"
    ], 
    "xo": [
        "application/vnd.olpc-sugar"
    ], 
    "xop": [
        "application/xop+xml"
    ], 
    "xpdl": [
        "application/xml"
    ], 
    "xpi": [
        "application/x-xpinstall"
    ], 
    "xpix": [
        "application/x-vnd.ls-xpix"
    ], 
    "xpl": [
        "application/xproc+xml"
    ], 
    "xpm": [
        "image/x-xpixmap", 
        "image/xpm"
    ], 
    "xpr": [
        "application/vnd.is-xpr"
    ], 
    "xps": [
        "application/vnd.ms-xpsdocument"
    ], 
    "xpw": [
        "application/vnd.intercon.formnet"
    ], 
    "xpx": [
        "application/vnd.intercon.formnet"
    ], 
    "xsl": [
        "application/xml"
    ], 
    "xslt": [
        "application/xslt+xml"
    ], 
    "xsm": [
        "application/vnd.syncml+xml"
    ], 
    "xspf": [
        "application/xspf+xml"
    ], 
    "xsr": [
        "video/x-amt-showrun"
    ], 
    "xul": [
        "application/vnd.mozilla.xul+xml"
    ], 
    "xvm": [
        "application/xv+xml"
    ], 
    "xvml": [
        "application/xv+xml"
    ], 
    "xwd": [
        "image/x-xwd", 
        "image/x-xwindowdump"
    ], 
    "xyz": [
        "chemical/x-xyz"
    ], 
    "xz": [
        "application/x-xz"
    ], 
    "yang": [
        "application/yang"
    ], 
    "yin": [
        "application/yin+xml"
    ], 
    "z": [
        "application/x-compress", 
        "application/x-compressed"
    ], 
    "z1": [
        "application/x-zmachine"
    ], 
    "z2": [
        "application/x-zmachine"
    ], 
    "z3": [
        "application/x-zmachine"
    ], 
    "z4": [
        "application/x-zmachine"
    ], 
    "z5": [
        "application/x-zmachine"
    ], 
    "z6": [
        "application/x-zmachine"
    ], 
    "z7": [
        "application/x-zmachine"
    ], 
    "z8": [
        "application/x-zmachine"
    ], 
    "zaz": [
        "application/vnd.zzazz.deck+xml"
    ], 
    "zip": [
        "application/x-compressed", 
        "application/x-zip-compressed", 
        "application/zip", 
        "multipart/x-zip"
    ], 
    "zir": [
        "application/vnd.zul"
    ], 
    "zirz": [
        "application/vnd.zul"
    ], 
    "zmm": [
        "application/vnd.handheld-entertainment+xml"
    ], 
    "zoo": [
        "application/octet-stream"
    ], 
    "zsh": [
        "text/x-script.zsh"
    ]
}

perl code to convert https://gist.github.com/nimasdj/801b0b1a50112ea6a997 to this json format:
https://gist.github.com/bj4rtmar/19c367486d2da5b5f1b9

Keys and values reversed (mime type to list of file extensions):
https://gist.github.com/bj4rtmar/a9687fcfabc56f798c62