About MIME Type & File Extension Lookup
Search hundreds of file extensions and MIME content-types (e.g. .json -> application/json, .webp -> image/webp) with descriptions and HTTP headers.
Key Capabilities & Features
- Search by extension or MIME type
- Common HTTP header snippets
- Categorized by Image, Audio, Video, Document, Code, Font
- 1-click copy MIME string
How to Use MIME Type & File Extension Lookup
Search Extension or Type
Type an extension (e.g. "png", "pdf", "mp4") or MIME keyword.
Review MIME Specifications
Inspect the canonical Content-Type string, category, and RFC reference.
Configure Server / Headers
Apply the Content-Type header to your web server (Nginx, Apache, Caddy, Cloudflare) or API response headers.
Privacy & In-Browser Execution Guarantee
Pure client-side database search.
Frequently Asked Questions
What is a MIME type and how does a browser use it?
A MIME (Multipurpose Internet Mail Extensions) type is an HTTP header (Content-Type) that instructs web browsers how to render files (e.g. text/html, application/json, image/webp).
Why is my browser downloading a file instead of displaying it?
This occurs when your web server serves a generic application/octet-stream MIME type or sets Content-Disposition: attachment instead of the specific format like image/png or text/plain.
What are the official MIME types for WebAssembly, JSON, and WebP?
WebAssembly uses application/wasm, JSON uses application/json, and WebP images use image/webp according to official IANA specifications.