MIME Types
Look up MIME type for any file extension or find extensions for a MIME type
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About MIME Types
MIME Types - Look Up and Understand Media Type Identifiers
Every file served over the internet carries a MIME type - a label that tells the browser (or any receiving application) what kind of data it is looking at. Get it wrong and a CSS file loads as plain text, a PDF triggers a download instead of rendering in-browser, or an API response is misinterpreted entirely. The MIME Types tool is your quick-reference companion for looking up correct MIME types by file extension and vice versa.
What Exactly Is a MIME Type?
MIME stands for Multipurpose Internet Mail Extensions. Originally designed to describe email attachment formats, MIME types now classify all content transmitted over HTTP. A MIME type consists of a type and a subtype separated by a slash: text/html for HTML documents, image/png for PNG images, application/json for JSON data, and so on.
The major type categories include text (human-readable documents), image (visual data), audio (sound data), video (moving images), application (binary or structured data that does not fit other categories), font (typeface files), and multipart (bundled content). Each category contains dozens to hundreds of registered subtypes.
Why MIME Types Matter for Developers
Web servers: Apache, Nginx, and IIS all map file extensions to MIME types in their configuration. If you add a new file type (say, .wasm for WebAssembly) and forget to configure the MIME type (application/wasm), the server may refuse to serve it or serve it as application/octet-stream, which breaks browser handling.
Content-Type headers: APIs must set the correct Content-Type header so clients parse responses correctly. Returning JSON with text/plain instead of application/json causes parsing failures in many HTTP libraries.
File upload validation: Server-side code should validate uploaded files by MIME type, not just extension. Renaming a PHP script to .jpg does not change its MIME type - proper validation catches this and prevents security vulnerabilities.
Email attachments: Mail servers use MIME types to determine how to encode and display attachments. An incorrect type can cause attachments to display inline when they should download, or vice versa.
Service workers and caching: Progressive web apps that cache assets in a service worker need correct MIME types to serve cached responses that browsers accept. A mistyped MIME can break the entire offline experience.
Using the MIME Types Tool
Search by file extension to find the correct MIME type: enter .svg and get image/svg+xml. Or search by MIME type to find associated extensions: enter application/pdf and see .pdf. The database covers hundreds of registered types from the IANA registry, including common ones you use daily and obscure ones you encounter once a year.
Each result includes the full MIME type string ready to copy into your server configuration, HTTP headers, or code. No more googling what is the MIME type for .webp and sifting through Stack Overflow threads.
Keeping Your Stack Correct
Modern web development introduces new file types regularly: .avif images, .woff2 fonts, .mjs modules, .webmanifest files. Each needs a correct MIME mapping. This MIME Types reference stays current so your configurations do too.
Instant Access, No Setup
The tool runs in your browser, requires no registration, and is completely free. Bookmark it and stop wasting time on MIME type guesswork during your next deployment or debugging session.