What this tool does
Enter a file extension, MIME type, or keyword to find common matches. When a MIME type has several known extensions, the result lists them together.
- The extension can be entered with or without the leading period, ignoring common case differences.
- The reverse lookup retains all known extensions corresponding to a MIME.
- Extension-to-MIME matches are a reference. Confirm the Content-Type against the actual file contents and the requirements of the platform where you will use it.
How to use it
- Enter an extension, MIME Type, or keyword.
- Click "Query MIME".
- See exact matches and related results.
- Copy the required MIME or extension list.
Common uses
- Query common Content-Types for JSON, images, fonts, and media files.
- Reverse lookup of possible file extensions from response MIME.
- Search type families such as image, audio, or archive.
Privacy and security
Your input and results stay in your browser and are not uploaded or saved automatically. Copy any results you want to keep and save them yourself before leaving the page.
MIME Type Lookup Features
Look up MIME types by file extension, find extensions for a MIME type, or search by keyword. Review the result, then copy it for use.
FAQ
What is the MIME Type of JSON?
A common standard type is application/json.
Why do JPG and JPEG produce the same results?
They are common extensions for the same image format, and usually map to image/jpeg.
Will unknown extensions be automatically queried online?
No. The tool only searches local mappings and explicitly says there is no match.
Can MIME Type prove file security?
No. Both extensions and declared MIME can be unreliable, and security scenarios also require verification of the actual file content.