File tools

Various tools for working with files and file formats.

Please note that these tools aren't optimized for large amounts of data, processing can slow down or run into problems once you reach above 150,000 characters. A cap of 1 million characters is currently in place.

Check file type

Select a file to check its file type / header. Only the first 16 bytes of each file are read and then discarded, no files are actually uploaded or stored anywhere. Files are matches against the File headers table below and won't catch everything. Feel free to reach out if there's a header missing or one you think would be worth adding.

Check file headers

A list of common file headers in hexadecimal format, useful if you have a chunk of data so you can quickly match it with a potential file type.

More information is available on the File signatures Wikipedia page.

File headers in hexadecimal format