utitool is a macOS command line tool you can use to reveal a file’s Uniform Type Identifier (UTI).

It can also be used to reveal information about a specified UTI, or the UTI(s) bound to a specified file extension.

macOS’ Launch Services registry data for UTIs or apps can also be viewed in machine- or human-readable form.

utitool requires macOS 11.5 ‘Big Sur’ or above.

Building utitool from source requires my Clicore Swift Package.

For more details, and full usage information, please see my website.

See Changelog

utitool is copyright © 2025, Tony Smith. Its source code is released under the MIT Licence.