Web server can send response to the client in many format. This is possible through different MIME(Multipurpose Internet Mail Extensions) type code. The following is the list of MIME type used by the web servers :

Extension Name MIME type/subtype
.3dmf x-world/x-3dmf
.a application/octet-stream
.aab application/x-authorware-bin
.aam application/x-authorware-map
.aas application/x-authorware-seg
.abc text/vnd.abc
.acgi text/html
.afl video/animaflex
.ai application/postscript
.aif audio/x-aiff
.aifc audio/x-aiff
.aiff audio/x-aiff
.aim application/x-aim
.aip text/x-audiosoft-intra
.ani application/x-navi-animation
.aps application/mime
.arc application/octet-stream
.arj application/octet-stream
.art image/x-jg
.asf video/x-ms-asf
.asm text/x-asm
.asp text/asp
.asx video/x-ms-asf-plugin
.au audio/x-au
.avi video/x-msvideo
.avs video/avs-video
.bcpio application/x-bcpio
.bin application/x-macbinary
.bm image/bmp
.bmp image/x-windows-bmp
.boo application/book
.book application/book
.boz application/x-bzip2
.bsh application/x-bsh
.bz application/x-bzip
.bz2 application/x-bzip2
.c text/x-c
.cat application/vnd.ms-pki.seccat
.cc text/x-c
.ccad application/clariscad
.cco application/x-cocoa
.cdf application/x-netcdf
.cer application/x-x509-ca-cert
.cha application/x-chat
.chat application/x-chat
.class application/x-java-class
.com text/plain
.conf text/plain
.cpio application/x-cpio
.cpp text/x-c
.cpt application/x-cpt
.crl application/pkix-crl
.crt application/x-x509-ca-cert
.csh text/x-script.csh
.css text/css
.cxx text/plain
.dcr application/x-director
.deepv application/x-deepv
.def text/plain
.der application/x-x509-ca-cert
.dif video/x-dv
.dir application/x-director
.dl video/x-dl
.doc application/msword
.dot application/msword
.dp application/commonground
.drw application/drafting
.dump application/octet-stream
.dv video/x-dv
.dvi application/x-dvi
.dwf model/vnd.dwf
.dwg image/x-dwg
.dxf image/x-dwg
.dxr application/x-director
.el text/x-script.elisp
.elc application/x-elc
.env application/x-envoy
.eps application/postscript
.es application/x-esrehber
.etx text/x-setext
.evy application/x-envoy
.exe application/octet-stream
.f text/x-fortran
.f77 text/x-fortran
.f90 text/x-fortran
.fdf application/vnd.fdf
.fif image/fif
.fli video/x-fli
.flo image/florian
.flx text/vnd.fmi.flexstor
.fmf video/x-atomic3d-feature
.for text/x-fortran
.fpx image/vnd.net-fpx
.frl application/freeloader
.funk audio/make
.g text/plain
.g3 image/g3fax
.gif image/gif
.gl video/x-gl
.gsd audio/x-gsm
.gsm audio/x-gsm
.gsp application/x-gsp
.gss application/x-gss
.gtar application/x-gtar
.gz application/x-gzip
.gzip multipart/x-gzip
.h text/x-h
.hdf application/x-hdf
.help application/x-helpfile
.hgl application/vnd.hp-hpgl
.hh text/x-h
.hlb text/x-script
.hlp application/x-winhelp
.hpg application/vnd.hp-hpgl
.hpgl application/vnd.hp-hpgl
.hqx application/x-binhex40
.hta application/hta
.htc text/x-component
.htm text/html
.html text/html
.htmls text/html
.htt text/webviewhtml
.htx text/html
.ice x-conference/x-cooltalk
.ico image/x-icon
.idc text/plain
.ief image/ief
.iefs image/ief
.iges model/iges
.igs model/iges
.ima application/x-ima
.imap application/x-httpd-imap
.inf application/inf
.ip application/x-ip2
.isu video/x-isvideo
.it audio/it
.iv application/x-inventor
.ivr i-world/i-vrml
.ivy application/x-livescreen
.jam audio/x-jam
.jav text/x-java-source
.java text/x-java-source
.jcm application/x-java-commerce
.jpe image/pjpeg
.jpeg image/pjpeg
.jpg image/pjpeg
.jps image/x-jps
.js text/ecmascript
.jut image/jutvision
.kar music/x-karaoke
.ksh text/x-script.ksh
.la audio/x-nspaudio
.lam audio/x-liveaudio
.latex application/x-latex
.lha application/x-lha
.lhx application/octet-stream
.list text/plain
.lma audio/x-nspaudio
.log text/plain
.lsp text/x-script.lisp
.lst text/plain
.lsx text/x-la-asf
.ltx application/x-latex
.lzh application/x-lzh
.lzx application/x-lzx
.m text/x-m
.m1v video/mpeg
.m2a audio/mpeg
.m2v video/mpeg
.m3u audio/x-mpequrl
.man application/x-troff-man
.map application/x-navimap
.mar text/plain
.mbd application/mbedlet
.mcd application/x-mathcad
.mcf text/mcf
.mcp application/netmc
.me application/x-troff-me
.mht message/rfc822
.mhtml message/rfc822
.mid x-music/x-midi
.midi x-music/x-midi
.mif application/x-mif
.mime www/mime
.mjpg video/x-motion-jpeg
.mm application/x-meme
.mme application/base64
.mod audio/x-mod
.moov video/quicktime
.mov video/quicktime
.movie video/x-sgi-movie
.mp2 video/x-mpeq2a
.mp3 video/x-mpeg
.mpa video/mpeg
.mpc application/x-project
.mpe video/mpeg
.mpeg video/mpeg
.mpg video/mpeg
.mpga audio/mpeg
.mpp application/vnd.ms-project
.mpt application/x-project
.mpv application/x-project
.mpx application/x-project
.mrc application/marc
.ms application/x-troff-ms
.mv video/x-sgi-movie
.my audio/make
.nap image/naplps
.naplps image/naplps
.nc application/x-netcdf
.nif image/x-niff
.niff image/x-niff
.nix application/x-mix-transfer
.nsc application/x-conference
.nvd application/x-navidoc
.o application/octet-stream
.oda application/oda
.omc application/x-omc
.omcd application/x-omcdatamaker
.omcr application/x-omcregerator
.p text/x-pascal
.p10 application/x-pkcs10
.p12 application/x-pkcs12
.p7a application/x-pkcs7-signature
.p7c application/x-pkcs7-mime
.p7m application/x-pkcs7-mime
.p7r application/x-pkcs7-certreqresp
.p7s application/pkcs7-signature
.part application/pro_eng
.pas text/pascal
.pbm image/x-portable-bitmap
.pcl application/x-pcl
.pct image/x-pict
.pcx image/x-pcx
.pdb chemical/x-pdb
.pdf application/pdf
.pfunk audio/make.my.funk
.pgm image/x-portable-greymap
.pic image/pict
.pict image/pict
.pko application/vnd.ms-pki.pko
.pl text/x-script.perl
.plx application/x-pixclscript
.pm text/x-script.perl-module
.pm4 application/x-pagemaker
.pm5 application/x-pagemaker
.png image/png
.pnm image/x-portable-anymap
.pot application/vnd.ms-powerpoint
.pov model/x-pov
.ppa application/vnd.ms-powerpoint
.ppm image/x-portable-pixmap
.pps application/vnd.ms-powerpoint
.ppt application/x-mspowerpoint
.ppz application/mspowerpoint
.pre application/x-freelance
.prt application/pro_eng
.ps application/postscript
.psd application/octet-stream
.pvu paleovu/x-pv
.pwz application/vnd.ms-powerpoint
.py text/x-script.phyton
.pyc applicaiton/x-bytecode.python
.qcp audio/vnd.qcelp
.qd3 x-world/x-3dmf
.qd3d x-world/x-3dmf
.qif image/x-quicktime
.qt video/quicktime
.qtc video/x-qtc
.qti image/x-quicktime
.qtif image/x-quicktime
.ra audio/x-realaudio
.ram audio/x-pn-realaudio
.ras image/x-cmu-raster
.rast image/cmu-raster
.rexx text/x-script.rexx
.rf image/vnd.rn-realflash
.rgb image/x-rgb
.rm audio/x-pn-realaudio
.rmi audio/mid
.rmm audio/x-pn-realaudio
.rmp audio/x-pn-realaudio-plugin
.rng application/vnd.nokia.ringing-tone
.rnx application/vnd.rn-realplayer
.roff application/x-troff
.rp image/vnd.rn-realpix
.rpm audio/x-pn-realaudio-plugin
.rt text/vnd.rn-realtext
.rtf text/richtext
.rtx text/richtext
.rv video/vnd.rn-realvideo
.s text/x-asm
.s3m audio/s3m
.saveme application/octet-stream
.sbk application/x-tbook
.scm video/x-scm
.sdml text/plain
.sdp application/x-sdp
.sdr application/sounder
.sea application/x-sea
.set application/set
.sgm text/x-sgml
.sgml text/x-sgml
.sh text/x-script.sh
.shar application/x-shar
.shtml text/x-server-parsed-html
.sid audio/x-psid
.sit application/x-stuffit
.skd application/x-koan
.skm application/x-koan
.skp application/x-koan
.skt application/x-koan
.sl application/x-seelogo
.smi application/smil
.smil application/smil
.snd audio/x-adpcm
.sol application/solids
.spc text/x-speech
.spl application/futuresplash
.spr application/x-sprite
.sprite application/x-sprite
.src application/x-wais-source
.ssi text/x-server-parsed-html
.ssm application/streamingmedia
.sst application/vnd.ms-pki.certstore
.step application/step
.stl application/x-navistyle
.stp application/step
.sv4cpio application/x-sv4cpio
.sv4crc application/x-sv4crc
.svf image/x-dwg
.svr x-world/x-svr
.swf application/x-shockwave-flash
.t application/x-troff
.talk text/x-speech
.tar application/x-tar
.tbk application/x-tbook
.tcl text/x-script.tcl
.tcsh text/x-script.tcsh
.tex application/x-tex
.texi application/x-texinfo
.texinfo application/x-texinfo
.text text/plain
.tgz application/x-compressed
.tif image/x-tiff
.tiff image/x-tiff
.tr application/x-troff
.tsi audio/tsp-audio
.tsp audio/tsplayer
.tsv text/tab-separated-values
.turbot image/florian
.txt text/plain
.uil text/x-uil
.uni text/uri-list
.unis text/uri-list
.unv application/i-deas
.uri text/uri-list
.uris text/uri-list
.ustar multipart/x-ustar
.uu text/x-uuencode
.uue text/x-uuencode
.vcd application/x-cdlink
.vcs text/x-vcalendar
.vda application/vda
.vdo video/vdo
.vew application/groupwise
.viv video/vnd.vivo
.vivo video/vnd.vivo
.voc audio/x-voc
.vos video/vosaic
.vox audio/voxware
.vqe audio/x-twinvq-plugin
.vqf audio/x-twinvq
.vql audio/x-twinvq-plugin
.vrml x-world/x-vrml
.vrt x-world/x-vrt
.vsd application/x-visio
.vst application/x-visio
.vsw application/x-visio
.w60 application/wordperfect6.0
.w61 application/wordperfect6.1
.w6w application/msword
.wav audio/x-wav
.wb1 application/x-qpro
.wbmp image/vnd.wap.wbmp
.web application/vnd.xara
.wiz application/msword
.wk1 application/x-123
.wmf windows/metafile
.wml text/vnd.wap.wml
.wmlc application/vnd.wap.wmlc
.wmls text/vnd.wap.wmlscript
.wmlsc application/vnd.wap.wmlscriptc
.word application/msword
.wp application/wordperfect
.wp5 application/wordperfect6.0
.wp6 application/wordperfect
.wpd application/x-wpwin
.wq1 application/x-lotus
.wri application/x-wri
.wrl x-world/x-vrml
.wrz x-world/x-vrml
.wsc text/scriplet
.wsrc application/x-wais-source
.wtk application/x-wintalk
.xbm image/xbm
.xdr video/x-amt-demorun
.xgz xgl/drawing
.xif image/vnd.xiff
.xl application/excel
.xla application/x-msexcel
.xlb application/x-excel
.xlc application/x-excel
.xld application/x-excel
.xlk application/x-excel
.xll application/x-excel
.xlm application/x-excel
.xls application/x-msexcel
.xlt application/x-excel
.xlv application/x-excel
.xlw application/x-msexcel
.xm audio/xm
.xml text/xml
.xmz xgl/movie
.xpix application/x-vnd.ls-xpix
.xpm image/xpm
.x-png image/png
.xsr video/x-amt-showrun
.xwd image/x-xwindowdump
.xyz chemical/x-pdb
.z application/x-compressed
.zip multipart/x-zip
.zoo application/octet-stream
.zsh text/x-script.zsh