Tools/MIME Type Lookup
Networking & Web

MIME Type Lookup

Look up the correct MIME type for a file extension, or find the extension that matches a given MIME type string.

Free & unlimitedRuns in your browserNo sign-up required
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How it works

Three steps, no setup

1

Search by extension or type

Try ".png" or "image/png" — either direction works.

2

Get the matching format

Covers text, image, audio, video, application, and font categories.

3

Copy it into your headers

Drop the right Content-Type value straight into your server config or API response.

Common questions

Frequently asked questions

Why does the Content-Type header matter?
Browsers and clients use it to decide how to render or handle a file — an incorrect value can cause a file to download instead of display, or vice versa.
What if my format is not listed?
The reference covers the 50 most commonly used types on the web — for obscure or vendor-specific formats, check the relevant IANA registry.
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