MIME Type Lookup
Find common media types by filename, extension or MIME string, with matching extensions and a clear unknown-type fallback.
Start with your input
Edit the example or replace it with your own text.
How to use MIME Type Lookup
- Enter a filename, extension such as .webp, or a MIME type such as application/json.
- Look up the common mapping and related extensions.
- Review the result against your server’s content and configuration.
Look up a name, not the actual file bytes
This reference maps common extensions to media types and can reverse-search a media type without parameters. Filename matching ignores query and fragment suffixes and compares extensions without case. Multiple extensions can map to one media type, such as jpg and jpeg. The result does not prove that a renamed file contains the expected data.
Unknown is different from a verified type
An unrecognized extension returns an explicit unknown result and a generic binary fallback suggestion. The lookup does not inspect file signatures or override browser sniffing rules. Use the actual encoder output and HTTP Content-Type when serving data. For unusual formats, consult the official registry or format documentation rather than guessing a type from the filename alone.
Example input
document.pdf
Can renaming a file to .png make it a PNG image?
No. The extension is a label. Use a real format converter when the encoded bytes need to change.
Is input uploaded?
Processing takes place in your browser. This tool does not send your input or selected files to a conversion API.