Two Important Default MiME types

  • text/plain : the default value for textual files. A textual file should be human-readable and must not contain binary data.
  • application/octet-stream : the default value for all other cases. An unknown file type should use this type. Browsers are particularly careful when manipulating these files to protect users from software vulnerabilities and possible dangerous behavior.

Media Types (iana.org) IANA official registry of MIME Media Type

Some Important MIME Type

Extension Kind of document MIME Type
.aac AAC audio audio/aac
.abw AbiWord document application/x-abiword
.arc Archive document (multiple files embedded) application/x-freearc
.avif AVIF image image/avif
.avi AVI: Audio Video Interleave video/x-msvideo
.azw Amazon Kindle eBook format application/vnd.amazon.ebook
.bin Any kind of binary data application/octet-stream
.bmp Windows OS/2 Bitmap Graphics image/bmp
.bz BZip archive application/x-bzip
.bz2 BZip2 archive application/x-bzip2
.cda CD audio application/x-cdf
.csh C-Shell script application/x-csh
.css Cascading Style Sheets (CSS) text/css
.csv Comma-separated values (CSV) text/csv
.doc Microsoft Word application/msword
.docx Microsoft Word (OpenXML) application/vnd.openxmlformats-officedocument.wordprocessingml.document
.eot MS Embedded OpenType fonts application/vnd.ms-fontobject
.epub Electronic publication (EPUB) application/epub+zip
.gz GZip Compressed Archive application/gzip
.gif Graphics Interchange Format (GIF) image/gif
.htm, .html HyperText Markup Language (HTML) text/html
.ico Icon format image/vnd.microsoft.icon
.ics iCalendar format text/calendar
.jar Java Archive (JAR) application/java-archive
.jpeg, .jpg JPEG images image/jpeg
.js JavaScript text/javascript (Specifications: HTML and RFC 9239)
.json JSON format application/json
.jsonld JSON-LD format application/ld+json
.mid, .midi Musical Instrument Digital Interface (MIDI) audio/midi, audio/x-midi
.mjs JavaScript module text/javascript
.mp3 MP3 audio audio/mpeg
.mp4 MP4 video video/mp4
.mpeg MPEG Video video/mpeg
.mpkg Apple Installer Package application/vnd.apple.installer+xml
.odp OpenDocument presentation document application/vnd.oasis.opendocument.presentation
.ods OpenDocument spreadsheet document application/vnd.oasis.opendocument.spreadsheet
.odt OpenDocument text document application/vnd.oasis.opendocument.text
.oga OGG audio audio/ogg
.ogv OGG video video/ogg
.ogx OGG application/ogg
.opus Opus audio audio/opus
.otf OpenType font font/otf
.png Portable Network Graphics image/png
.pdf Adobe Portable Document Format (PDF) application/pdf
.php Hypertext Preprocessor (Personal Home Page) application/x-httpd-php
.ppt Microsoft PowerPoint application/vnd.ms-powerpoint
.pptx Microsoft PowerPoint (OpenXML) application/vnd.openxmlformats-officedocument.presentationml.presentation
.rar RAR archive application/vnd.rar
.rtf Rich Text Format (RTF) application/rtf
.sh Bourne shell script application/x-sh
.svg Scalable Vector Graphics (SVG) image/svg+xml
.tar Tape Archive (TAR) application/x-tar
.tif, .tiff Tagged Image File Format (TIFF) image/tiff
.ts MPEG transport stream video/mp2t
.ttf TrueType Font font/ttf
.txt Text, (generally ASCII or ISO 8859-n) text/plain
.vsd Microsoft Visio application/vnd.visio
.wav Waveform Audio Format audio/wav
.weba WEBM audio audio/webm
.webm WEBM video video/webm
.webp WEBP image image/webp
.woff Web Open Font Format (WOFF) font/woff
.woff2 Web Open Font Format (WOFF) font/woff2
.xhtml XHTML application/xhtml+xml
.xls Microsoft Excel application/vnd.ms-excel
.xlsx Microsoft Excel (OpenXML) application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.xml XML application/xml is recommended as of RFC 7303 (section 4.1), but text/xml is still used sometimes. You can assign a specific MIME type to a file with .xml extension depending on how its contents are meant to be interpreted. For instance, an Atom feed is application/atom+xml, but application/xml serves as a valid default.
.xul XUL application/vnd.mozilla.xul+xml
.zip ZIP archive application/zip
.3gp 3GPP audio/video container video/3gpp; audio/3gpp if it doesn’t contain video
.3g2 3GPP2 audio/video container video/3gpp2; audio/3gpp2 if it doesn’t contain video
.7z 7-zip archive application/x-7z-compressed