DevToolkit

MIME Type Lookup

Browser only

MIME Type Lookup

Look up a MIME type, file extension, or filename to see the MIME type, common extensions, category, and typical usage.

File extension, filename, or MIME typeExamples: .png, png, image.png, application/json, text/html

Changing the input clears the previous result so Copy always uses the latest lookup.

Deep dive

More context for MIME Type Lookup

Useful when you want to check a MIME type, file extension, or Content-Type header before you wire it into a page or server response.

Overview

What is this tool?

It looks up MIME types and related file extensions locally in your browser so you can check common content types, categories, and header values without leaving the page.

Input samples

Example inputs

Extension to type

Input: .json
Output: application/json

Type to extension

Input: image/webp
Output: .webp

Header check

Input: Content-Type: text/html; charset=utf-8
Output: HTML document with UTF-8 encoding

When to use it

Common use cases

Check a MIME type when you are setting a server response or reviewing a Content-Type header.
Find the file extension that matches a browser download or static asset.
Compare the MIME type used by a site, reverse proxy, or CDN with the file it serves.

Navigation

Explore related workflows

Keep moving through the collection, workflow, and adjacent tools that usually belong with this page.

Part of collection

Jump to the broader tool set that covers the same problem space.

HTTP & Web Debugging Tools

Tools for parsing headers, generating redirects, checking CORS, and debugging common website configuration issues.

Related workflow

Continue with the tool chain that usually goes together here.

Debug website headers and CORS

Parse response headers, review security protections, generate CORS snippets, and prepare redirect rules for web apps.

HTTP Headers Parser HTTP Security Headers Checker CORS Header Generator / Checker Redirect Rules Generator HTTP Status Code Lookup

Related tools

Open the closest adjacent tools without leaving the current context.

HTTP Headers Parser HTTP Security Headers Checker Nginx Config Checker HTML Metadata Extractor CORS Header Generator / Checker Redirect Rules Generator HTTP Status Code Lookup URL Encoder / Decoder

Answers

FAQ

Does it check file extension and Content-Type mappings?

Yes. It is built to help you move between file extension, MIME type, and the Content-Type header you would use in a response.

Is this a full registry browser?

No. It is a practical lookup tool for common MIME type check tasks rather than a complete IANA browser.

Can it help with server configuration?

Yes. It is useful when you are reviewing Nginx, Caddy, or static hosting settings that need the right content type.

Does it upload the file or header text I paste?

No. Lookups happen locally in your browser and nothing is sent to a backend server.

Disclaimer

Disclaimer / limitation note

This is a best-effort MIME type lookup tool and not a complete registry or server audit. Always confirm the final Content-Type behavior in the application, proxy, CDN, or static host you plan to use. All lookups happen locally in your browser and are not uploaded to a server.

Privacy

Privacy note

Lookup happens entirely in your browser. No backend request is made, no login is required, and DevToolkit does not store the values you search for.