MIME Type Checker

Look up MIME types by extension, MIME string, or upload a file to detect its type.

Free & unlimited

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Direction

Extension

All processing happens in your browser. No data is sent to any server.

About this tool

1
Enter a file extension
Type a file extension like .pdf, .json, or .mp4 into the search field.
2
View the MIME type
The corresponding MIME type (e.g., application/pdf) is displayed instantly.
3
Browse the full list
Scroll or search through the complete database of file extensions and their MIME types.

Use this tool when configuring web server Content-Type headers for file downloads.
Search by MIME type to find which file extensions are associated with it.
Bookmark commonly used MIME types like application/json and text/html for quick reference.

Instant lookup of MIME type from file extension
Reverse lookup from MIME type to extension
Comprehensive database covering hundreds of file types
Search and filter across the full MIME type list

Set correct Content-Type headers when serving files from a web server
Configure file upload validation to accept only specific MIME types
Identify unknown file types by their extension
Reference MIME types when building API responses that return file data

MIME (Multipurpose Internet Mail Extensions) type is a standard label that indicates the nature and format of a file, such as text/html for web pages or image/png for PNG images.

Uncommon or proprietary extensions may use application/octet-stream as a generic binary MIME type. You can also define custom MIME types in your server configuration.