MIME Types Lookup

Search MIME types by file extension or content type with descriptions, categories, and common uses.

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1. Enter a file extension (such as .json, .mp4, or .woff2) or a MIME type string (such as application/json) into the search field. 2. Browse the filtered results showing matching MIME types with their associated extensions and descriptions. 3. Use the category tabs (application, audio, image, text, video, font) to narrow results by type. 4. Click on any entry to see its full details including IANA registration status and binary/text classification. 5. Copy the MIME type string to use in your server configuration or Content-Type headers.

About This Tool

The MIME Types Lookup tool lets you quickly find the correct MIME type (media type) for any file extension, or look up which extensions are associated with a specific MIME type. Search by extension (like .json, .mp4, .woff2) or by type (like application/json, video/mp4) to get the full specification details.

MIME types are essential for web servers, APIs, and file handling systems. Using the wrong Content-Type header can cause browsers to mishandle files - for example, serving CSS with a text/plain type will prevent styling from working in strict mode. This reference covers hundreds of registered MIME types across all categories.

Each entry shows the full MIME type string, associated file extensions, whether it is binary or text-based, the IANA registration status, and common use cases. The tool is organized by category (application, audio, image, text, video, font, multipart) for easy browsing.

Frequently Asked Questions

A MIME type (Multipurpose Internet Mail Extensions type, now officially called media type) is a standard identifier for file formats on the internet. It consists of a type and subtype separated by a slash, like text/html or application/json.
Browsers use MIME types to determine how to handle files. If a server sends a JavaScript file with the wrong MIME type, the browser may refuse to execute it. Correct MIME types ensure proper rendering, security, and functionality.
The correct MIME type for JSON is application/json. Some older systems may use text/json or text/x-json, but application/json is the standard registered with IANA and should always be used.
Most web servers auto-detect MIME types from file extensions. You can override them in server configuration (Apache .htaccess, Nginx types block, or Express middleware). For APIs, set the Content-Type header explicitly in your response.

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