MIME Type Lookup

What is a MIME type?

A MIME type (also called a media type or Content-Type) is a label that tells a browser or server what kind of data a file contains. For example, text/html means an HTML page and image/webp means a WebP image. Every HTTP response includes a Content-Type header with the MIME type so the receiver knows how to handle the payload.

MIME type lookup

Use this tool to look up a MIME type by file extension, or find common file extensions for a given MIME type. Useful for server configs, CDNs, upload validation, and debugging incorrect Content-Type headers.

How to use

1. Type a file extension (like webp or index.html) to see the matching MIME type(s).
2. Or type a MIME type (like application/json) to see which file extensions map to it.
3. Copy the result directly into your server or CDN config.

Common web MIME types

• text/html — HTML pages (.html, .htm)
• text/css — CSS stylesheets (.css)
• text/javascript — JavaScript files (.js, .mjs)
• application/json — JSON data (.json)
• image/svg+xml — SVG images (.svg)
• image/webp — WebP images (.webp)
• application/wasm — WebAssembly modules (.wasm)
• font/woff2 — Web fonts (.woff2)

When MIME types matter

• Server misconfiguration — browsers may refuse to execute scripts or render images served with a wrong Content-Type
• CDN and cache rules — many CDNs set cache headers based on MIME type
• File upload validation — APIs often accept or reject files based on their declared MIME type
• Cross-origin requests — CORS preflight behavior depends partly on Content-Type

Examples

• svg → image/svg+xml
• wasm → application/wasm
• application/json → .json