Fast, dependency-free Go package to infer binary file types based on the magic numbers header signature

Powerful and versatile MIME sniffing package using pre-compiled glob patterns, magic number signatures, XML document namespaces, and tree magic for mounted volumes, generated from the XDG shared-mime-info database.

Comparison of Go MIME type detection libraries

File Signature Table in Go. Includes utility to find file type based on file signatures.

Trid is a Go package that provides an interface for the TrID file identifier tool.