Format Identification for Digital Objects (fido).
fido is a command-line tool to identify the file formats of digital objects.
It is designed for simple integration into automated work-flows.

License information

fido is distributed under the Apache 2 license.
See the project file “LICENSE.txt” for information on the history of this
software, terms & conditions for usage, and a DISCLAIMER OF ALL WARRANTIES…

Download and resources

Download from the FIDO GitHub Project release page.
Read the usage guide on the FIDO OPF Wiki page.

Mailing list

Subscribe to the fido mailing list.


Author: Adam Farquhar (BL), 2010
Maintainer: Maurice de Rooij (OPF/NANETH), 2011, 2012, 2013
Maintainer: Artefactual Systems as part of their affiliate membership of the Foundation, 2015 to present
fido uses the UK National Archives (TNA) PRONOM File Format and Container descriptions.
PRONOM is available from