The Unified Font Object (UFO) is a cross-platform, cross-application, human readable, future proof format for storing font data.

The UFO Design Philosophy


UFO 1 Published in 2004.
UFO 2 Published in March 2009.
UFO 3 Published in March 2012.
UFO 4 In development.


Contributions are welcome! The source for the documentation, an issue tracker and more are located on GitHub.

Questions, Comments, Discussions

If you have questions, comments or would like to discuss the UFO specification, please post to the UFO Specification Issue Tracker on our GitHub.


If you would like to stay informed about group meetings and other organizational matters, subscribe to the UFO Specification Google Group.