MIME type lookup
Common file extensions and their MIME types
Filter by extension, full media type or description. This is a common-types reference; extensions alone cannot validate a file's actual format.
| Extension | MIME | Description |
|---|---|---|
| .txt | text/plain | Plain text |
| .html | text/html | HTML document |
| .htm | text/html | HTML document |
| .css | text/css | Cascading style sheet |
| .js | text/javascript | JavaScript |
| .mjs | text/javascript | ES module JavaScript |
| .json | application/json | JSON data |
| .xml | application/xml | XML data |
| .yaml | application/yaml | YAML data |
| .csv | text/csv | Comma-separated values |
| .md | text/markdown | Markdown text |
| application/pdf | PDF document | |
| .zip | application/zip | ZIP archive |
| .gz | application/gzip | gzip archive |
| .tar | application/x-tar | tar archive |
| .7z | application/x-7z-compressed | 7-Zip archive |
| .rar | application/vnd.rar | RAR archive |
| .png | image/png | PNG image |
| .jpg | image/jpeg | JPEG image |
| .jpeg | image/jpeg | JPEG image |
| .gif | image/gif | GIF image |
| .webp | image/webp | WebP image |
| .avif | image/avif | AVIF image |
| .svg | image/svg+xml | SVG image |
| .ico | image/vnd.microsoft.icon | Icon |
| .bmp | image/bmp | Windows bitmap |
| .heic | image/heic | HEIC image |
| .mp3 | audio/mpeg | MP3 audio |
| .wav | audio/wav | WAV audio |
| .ogg | audio/ogg | Ogg audio |
| .flac | audio/flac | FLAC audio |
| .mp4 | video/mp4 | MPEG-4 video |
| .mkv | video/x-matroska | Matroska video |
| .webm | video/webm | WebM video |
| .mov | video/quicktime | QuickTime video |
| .doc | application/msword | Word 97–2003 document |
| .docx | application/vnd.openxmlformats-officedocument.wordprocessingml.document | Word document |
| .xls | application/vnd.ms-excel | Excel 97–2003 spreadsheet |
| .xlsx | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | Excel spreadsheet |
| .ppt | application/vnd.ms-powerpoint | PowerPoint 97–2003 presentation |
| .pptx | application/vnd.openxmlformats-officedocument.presentationml.presentation | PowerPoint presentation |
| .ttf | font/ttf | TrueType font |
| .otf | font/otf | OpenType font |
| .woff | font/woff | Web font (WOFF) |
| .woff2 | font/woff2 | Web font (WOFF2) |
| .wasm | application/wasm | WebAssembly module |
| .bin | application/octet-stream | Arbitrary binary data |
Example
Input
json
Example result
.json → application/json
JSON exchanged over a network normally uses UTF-8. A lookup does not validate file contents.
Technical details & limits
Media types use type/subtype with optional parameters such as charset. Extensions and types are not one-to-one. Servers should consider file contents, application rules and response context. This common-types table neither inspects file bytes nor reproduces the full IANA registry.
About this tool
Look up common MIME mappings by extension or media type when setting Content-Type, serving static assets or designing upload allowlists. The local table works offline after loading.
Use cases
- Configure `Content-Type` in Nginx or a CDN.
- Match extension whitelists against real MIME types for uploads.
- Look up what an `application/vnd.*` format actually is.
Notes
This is a common-types reference. Use IANA for complete registration information.
FAQ
- Does renaming a file to .jpg make it an image?
- No. A filename does not change the data format. Upload validation must inspect content and enforce allowed formats rather than trusting the name or client Content-Type.
- Can I search by a complete media type?
- Yes. Search application/json or the extension json; matching is case-insensitive.
- Which type should I use when an extension has several mappings?
- Choose by the actual format, usage and receiving protocol. An extension alone does not guarantee a unique answer.
- What if Content-Type disagrees with the filename extension?
- Inspect the actual file content and server configuration, not just the extension. Senders should provide the correct media type and receivers should still validate files.
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