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MIME Type Lookup

Look up MIME types by file extension or type

ExtensionMIME TypeDescription

What is MIME Type Lookup?

MIME Type Lookup is a free online tool that helps you look up mime types by file extension or type. It runs entirely in your browser using client-side JavaScript, so your data stays private and never leaves your device.

When to Use

  • Quick lookups during coding sessions without leaving your browser
  • Generating boilerplate configs, snippets, or reference documentation
  • Learning about development standards and best practices hands-on

How to Use

Enter your input in the field above, adjust any settings if available, and click the action button. Results appear instantly—no page reload, no server wait. All processing happens locally in your browser.

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Deep Dive: How MIME Type Lookup Works

MIME Type Lookup is a developer utility that streamlines common programming tasks, reducing context-switching and eliminating the need for heavyweight IDE installations for quick operations. Modern software development involves an enormous surface area of tools, formats, and protocols—developers regularly need to format code, validate syntax, encode data, parse URLs, inspect tokens, and reference documentation, often while deep in a debugging session or rapid prototyping flow. The MIME Type Lookup provides instant, lightweight access to these capabilities directly in your browser, with zero installation, zero configuration, and zero data leaving your machine. This client-side, privacy-first architecture is particularly valuable when working with proprietary code, API keys, authentication tokens, or internal configuration that should never touch third-party servers. Developer tools like this complement full IDEs by filling the gap between 'too simple for a script' and 'too quick to launch an IDE', keeping you in flow state and reducing the friction that accumulates across hundreds of micro-tasks throughout a development day.

Pro Tips

  • Use beautifiers before minifiers—make code readable, understand it, then compress for production
  • Validate JSON and YAML before committing—syntax errors in config files cause hard-to-debug runtime failures
  • Bookmark your most-used dev tools for quick access during debugging sessions

Common Mistakes to Avoid

  • Committing unformatted code—wastes reviewer time and creates noisy diffs
  • Minifying before debugging—always debug readable code

Frequently Asked Questions

How do I find the correct MIME type for a file extension?
Enter a file extension (like '.pdf' or '.json') into a MIME type lookup and it returns the corresponding MIME type—'application/pdf' or 'application/json'. You can also search by MIME type to find associated extensions. This is essential for configuring web servers, API responses, and email attachments correctly.
What is a MIME type and why does it matter for web servers?
MIME (Multipurpose Internet Mail Extensions) types tell browsers how to handle files—whether to display an image, play audio, render a PDF, or trigger a download. The Content-Type HTTP header uses MIME types. If your server sends 'text/plain' for an HTML file, the browser shows raw code instead of rendering the page.
How do I look up MIME types for uncommon file formats?
A comprehensive MIME lookup tool includes thousands of registered types from IANA's official registry and common unregistered types. Browse by category (application, audio, image, text, video) or search directly. The tool also shows the canonical extension and recommended usage notes for each MIME type.