GNU FreeFont (also known as Free UCS Outline Fonts) is a family of free OpenType, TrueType and WOFF vector fonts, implementing as much of the Universal Character Set (UCS) as possible, aside from the very large CJK Asian character set. The project was initiated in 2002 by Primož Peterlin and is now maintained by Steve White.

The family includes three faces: FreeMono, FreeSans, and FreeSerif, each in four styles (Regular, Italic/Oblique, Bold, and Bold Italic/Oblique).

The fonts are licensed under the GPL-3.0-or-later license with the Font-exception-2.0, ensuring they may be both freely distributed and embedded or otherwise utilized within a document without the document itself being covered by the GPL. The fonts can be obtained libre from GNU Savannah. They are also packaged on certain Linux distributions, including Ubuntu and Arch Linux.