MIME Type Lookup Online Free — Extension to MIME

MIME Type Lookup — look up a MIME type by extension

runs in your browser

⌃⏎ run · ⎋ clear · / focus input

Extension or MIME

Result

send output to

no matches

Result appears here as you type

runs in your browser · nothing uploaded

MIME Type Lookup Online

Updated 2026-07-09

Look up MIME types online for free. Enter a file extension to find its MIME type, or a MIME type to find the extensions that map to it — all from a built-in table in your browser, so nothing is uploaded.

The MIME type in a Content-Type header is what tells a browser to display a file rather than download it, and getting it wrong causes broken images, forced downloads, and rejected uploads. This two-way reference gives you the exact mapping in a second, whether you are configuring a server, setting a response header, or validating what a user uploaded.

// how to use

1 Type a file extension (like png) or a MIME type (like image/png) into the input panel.
2 SnapTools shows the matching MIME type, or the extensions that map to it.
3 Copy the result to use in headers, config, or validation.

// examples

Extension to MIME type

Input

svg

Output

image/svg+xml

MIME type to extensions

Input

application/json

Output

json

// common uses

Setting the correct Content-Type header for a response Configuring MIME types in a web server or CDN Validating file uploads by extension or type Debugging incorrect file handling in the browser

// faq

No. The lookup runs entirely in your browser from a built-in table, so nothing you type leaves your machine.

A MIME type (also called a media type) labels the format of a file or response body, like text/html or image/png. Servers send it in the Content-Type header so clients know how to handle the data.

Yes. Enter an extension to get its MIME type, or enter a MIME type to see the file extensions that map to it.

Some formats have more than one common extension — for example JPEG images use both jpg and jpeg — so the lookup lists all the ones that map to a given type.

Setting the correct Content-Type header, configuring a web server or CDN, validating uploads by their declared type, or debugging why a browser downloads a file instead of displaying it.

// related

HTTP Status Codes User Agent Parser URL Parser Base64 Encoder JSON Formatter

Use this via API

Get a free API key →

curl -X POST https://snaptools.dev/api/v1/tools/mime-type-lookup \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"svg"}'