MIME types, or Multipurpose Internet Mail Extensions, play a fundamental role in communication between servers and clientsas they define the nature and format of a file being transmitted. In this list of common MIME types, we have the MIME types and descriptions for frequently encountered file extensions.
| File extension | MIME Type | Description |
| .aac | audio/aac | AAC audio |
| .abw | application/x-abiword | AbiWord document |
| .arc | application/x-freearc | Archive document (multiple files embedded) |
| .avif | image/avif | AVIF image |
| .avi | video/x-msvideo | AVI: Audio Video Interleave |
| .azw | application/vnd.amazon.ebook | Amazon Kindle eBook format |
| .bin | application/octet-stream | Any kind of binary data |
| .bmp | image/bmp | Windows OS/2 Bitmap Graphics |
| .bz | application/x-bzip | BZip archive |
| .bz2 | application/x-bzip2 | BZip2 archive |
| .cda | application/x-cdf | CD audio |
| .csh | application/x-csh | C-Shell script |
| .css | text/css | Cascading Style Sheets (CSS) |
| .csv | text/csv | Comma-separated values (CSV) |
| .doc | application/msword | Microsoft Word |
| .docx | application/vnd.openxmlformats-officedocument.wordprocessingml.document | Microsoft Word (OpenXML) |
| .eot | application/vnd.ms-fontobject | MS Embedded OpenType fonts |
| .epub | application/epub+zip | Electronic publication (EPUB) |
| .gz | application/gzip | GZip Compressed Archive |
| .gif | image/gif | Graphics Interchange Format (GIF) |
| .htm, .html | text/html | HyperText Markup Language (HTML) |
| .ico | image/vnd.microsoft.icon | Icon format |
| .ics | text/calendar | iCalendar format |
| .jar | application/java-archive | Java Archive (JAR) |
| .jpeg, .jpg | image/jpeg | JPEG images |
| .js | text/javascript | JavaScript |
| .json | application/json | JSON format |
| .jsonld | application/ld+json | JSON-LD format |
| .mid, .midi | audio/midi, audio/x-midi | Musical Instrument Digital Interface (MIDI) |
| .mjs | text/javascript | JavaScript module |
| .mp3 | audio/mpeg | MP3 audio |
| .mp4 | video/mp4 | MP4 video |
| .mpeg | video/mpeg | MPEG Video |
| .mpkg | application/vnd.apple.installer+xml | Apple Installer Package |
| .odp | application/vnd.oasis.opendocument.presentation | OpenDocument presentation document |
| .ods | application/vnd.oasis.opendocument.spreadsheet | OpenDocument spreadsheet document |
| .odt | application/vnd.oasis.opendocument.text | OpenDocument text document |
| .oga | audio/ogg | OGG audio |
| .ogv | video/ogg | OGG video |
| .ogx | application/ogg | OGG |
| .opus | audio/opus | Opus audio |
| .otf | font/otf | OpenType font |
| .png | image/png | Portable Network Graphics |
| application/pdf | Adobe Portable Document Format (PDF) | |
| .php | application/x-httpd-php | Hypertext Preprocessor (Personal Home Page) |
| .ppt | application/vnd.ms-powerpoint | Microsoft PowerPoint |
| .pptx | application/vnd.openxmlformats-officedocument.presentationml.presentation | Microsoft PowerPoint (OpenXML) |
| .rar | application/vnd.rar | RAR archive |
| .rtf | application/rtf | Rich Text Format (RTF) |
| .sh | application/x-sh | Bourne shell script |
| .svg | image/svg+xml | Scalable Vector Graphics (SVG) |
| .tar | application/x-tar | Tape Archive (TAR) |
| .tif, .tiff | image/tiff | Tagged Image File Format (TIFF) |
| .ts | video/mp2t | MPEG transport stream |
| .ttf | font/ttf | TrueType Font |
| .txt | text/plain | Text, (generally ASCII or ISO 8859-n) |
| .vsd | application/vnd.visio | Microsoft Visio |
| .wav | audio/wav | Waveform Audio Format |
| .weba | audio/webm | WEBM audio |
| .webm | video/webm | WEBM video |
| .webp | image/webp | WEBP image |
| .woff | font/woff | Web Open Font Format (WOFF) |
| .woff2 | font/woff2 | Web Open Font Format (WOFF) |
| .xhtml | application/xhtml+xml | XHTML |
| .xls | application/vnd.ms-excel | Microsoft Excel |
| .xlsx | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | Microsoft Excel (OpenXML) |
| .xml | application/xml | XML |
| .xul | application/vnd.mozilla.xul+xml | XUL |
| .zip | application/zip | ZIP archive |
| .3gp | video/3gpp; audio/3gpp if it doesn’t contain video | 3GPP audio/video container |
| .3g2 | video/3gpp2; audio/3gpp2 if it doesn’t contain video | 3GPP2 audio/video container |
| .7z | application/x-7z-compressed | 7-zip archive |