ufo2ft
A bridge between UFOs and FontTools.
Decision gist · record as of 2026-08-14
Yes. ufo2ft is actively maintained, has no known vulnerabilities, carries a permissive MIT license, and solves a real problem for font developers: compiling production fonts without the Adobe FDK. Install friction is low. It is suitable for both one-off font builds and integrated into automated workflows.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires a UFO object as input; the package does not load UFO files directly from disk.
- Low friction: pure Python wheel with four runtime dependencies (booleanoperations, cffsubr, fontmath, fonttools).
- Actively maintained with a release 31 days ago and recent commits; no known vulnerabilities.
License · maintenance · safety
MIT (permissive) — MIT license permits unrestricted use, modification, and distribution in both open-source and commercial contexts with minimal obligations.
last release 2026-07-14 (31 days) · last repo commit 2026-08-10 · 175 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 99,468 downloads/mo, #13,021 on PyPI
Alternatives
Verify before relying
from ufo2ft import compileOTF, compileTTF
otf = compileOTF(ufo_object)
otf.save('MyFont-Regular.otf')
ttf = compileTTF(ufo_object)
ttf.save('MyFont-Regular.ttf')- Whether the package handles all UFO specification edge cases or only common workflows
- Performance characteristics when compiling large or complex font files
- Compatibility with UFO files created by specific design applications beyond documented examples
- Whether defcon is a required dependency or optional for typical workflows
What it is and what it does
ufo2ft is a Python library that bridges UFO font source files and OpenType binary compilation. It provides two main functions—compileOTF and compileTTF—that take a UFO object and produce a ready-to-use font file without needing Adobe's Font Development Kit. The library is built on fonttools and handles the conversion pipeline, including optional glyph filtering, curve type conversion (cubic to quadratic for TrueType), component decomposition, and automatic feature generation for kerning and mark positioning.
The package is designed for font designers and build pipelines that want to automate font compilation as part of a design workflow. It reads UFO metadata (family name, style name, naming data) and can be customized through UFO lib keys to control filter behavior, conversion error tolerances, and glyph inclusion/exclusion. It also supports both Adobe OpenType feature syntax and MTI/Monotype format for advanced table definitions.
Use it for
- Automate font compilation in a font design CI/CD pipeline without installing the Adobe FDK
- Programmatically generate OTF and TTF variants from a single UFO source during font development
- Apply glyph transformations (anchor propagation, overlap removal, component flattening) before compilation
- Convert cubic PostScript outlines to quadratic TrueType curves with configurable error tolerance
- Generate kerning and mark positioning features automatically from UFO anchor and kerning data
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
ufo2ft is actively maintained, has no known vulnerabilities, carries a permissive MIT license, and solves a real problem for font developers: compiling production fonts without the Adobe FDK. Install friction is low. It is suitable for both one-off font builds and integrated into automated workflows.
Install
ufo2ft on PyPI
Before you install
Low friction: pure Python wheel with four runtime dependencies (booleanoperations, cffsubr, fontmath, fonttools). Actively maintained with a release 31 days ago and recent commits; no known vulnerabilities.
Requires a UFO object as input; the package does not load UFO files directly from disk.
License in practice
MIT license permits unrestricted use, modification, and distribution in both open-source and commercial contexts with minimal obligations.
Quickstart
from ufo2ft import compileOTF, compileTTF
otf = compileOTF(ufo_object)
otf.save('MyFont-Regular.otf')
ttf = compileTTF(ufo_object)
ttf.save('MyFont-Regular.ttf')Verify before relying
- Whether the package handles all UFO specification edge cases or only common workflows
- Performance characteristics when compiling large or complex font files
- Compatibility with UFO files created by specific design applications beyond documented examples
- Whether defcon is a required dependency or optional for typical workflows
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 4 packagesbooleanoperationscffsubrfontmathfonttools |
| Maintenance | Actively maintained 31 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 99,468 / month, #13,021 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableEnvironment :: ConsoleEnvironment :: Other EnvironmentIntended Audience :: DevelopersIntended Audience :: End Users/DesktopNatural Language :: EnglishOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: Multimedia :: GraphicsTopic :: Multimedia :: Graphics :: Editors :: Vector-BasedTopic :: Multimedia :: Graphics :: Graphics ConversionTopic :: Software Development :: Libraries :: Python Modules |
Evidence: ufo2ft-3.9.0-py3-none-any.whl
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See also cffsubr · fonttools · glyphsLib · ufoLib2 · cu2qu · defcon · fontbakery · freetype-py · pymupdf-fonts · pyfiglet