MIME Type Lookup
Type a file extension or a MIME type to find its match — the list filters as you type.
Overview
A MIME type (also called a media type or content type) tells a browser or server what kind of data a file contains, e.g. image/png for a PNG image or application/pdf for a PDF document. This tool is a searchable reference of the most commonly used file-extension-to-MIME-type mappings.
This is a curated list of common, everyday types — not the full IANA media type registry, which runs to several thousand entries covering every specialized and legacy format ever registered.
Examples & Sample Data
Looking up a file extension
.json
application/json
How It Works
- Start typing a file extension (e.g. .png) or a MIME type (e.g. image/png).
- The list filters instantly to matching entries as you type.
- Clear the field to see the full reference list again.
Common Use Cases
Setting a Content-Type header
Find the correct MIME type to send for a given file extension when serving or uploading files.
Validating an upload's declared type
Check what MIME type a given file extension is expected to have, e.g. when writing file-upload validation.
Tips & Best Practices
- Some formats have more than one MIME type in real-world use (e.g. audio/wav and audio/x-wav) — this reference lists the most commonly used one.
- Search matches both extensions and MIME types, so typing part of either finds it.
Frequently Asked Questions
No. The lookup runs entirely in your browser against a built-in list — nothing you type is sent anywhere.
No — it's a curated list of the file types people look up most often. The official IANA media type registry has thousands of entries for specialized and legacy formats not included here.
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