File detector

Identifying a file can be done three ways: by looking at its content (the first bytes), by pasting in hex, or by checking just the extension. This tool combines all three and shows the IANA media type (MIME) where known. Nothing is sent, all analysis happens in your browser.

1. By content (magic bytes)

File

Drop a file here, or click to choose one.

Only the first few kilobytes are read.

…or paste the first bytes as hex

Result

Possible matches

File type	Extensions	MIME type	Bytes matched

First bytes (hex)

2. By extension

A file extension can mean completely different things on different operating systems. Type an extension and see all possible interpretations.