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.