Runebender

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Score7.1

Rank#4 of 29

PriceFree

Free planYes

Runs onLinux, macOS, Web, Windows

Summary

Runebender is a free font editor for UFO and Designspace font sources. Its editing tools cover glyphs, paths, filters, components, anchors, masters, interpolation, spacing, kerning, feature code, color fonts, text shaping, font information, and font checking. It opens UFO and Designspace files, Glyphs files and packages, and compiled TTF or OTF fonts; Glyphs files are converted to UFO, and compiled fonts are opened as UFOs in memory. It can also import Babelfont packages. Experimental local models can propose a heavier glyph master from a lighter one, while local chat is available through font-ml. The browser editor runs locally without uploading files, but its documented interaction gaps mean it is not recommended for real work. Runebender is alpha software and has no packaged native release; the native application is installed from source with Cargo. It writes UFO and Designspace files in place, so the documentation advises keeping sources under version control and working on copies. The project is licensed Apache-2.0 or MIT and is maintained independently, not as an official Linebender project.

Who it is for

Runebender may suit font designers working with UFO or Designspace sources who are comfortable with alpha software and installing a native app from source. Its experimental browser build is available for local use, but is not recommended for real work.

What is good

Edits glyphs, masters, spacing, and kerning.
Opens several font-source and compiled formats.
Experimental local model features are available.
Browser build runs without uploading files.

What to know first

Alpha software with no packaged native release.
Native installation requires building from source with Cargo.
Browser editor has interaction gaps.
Writes source files in place.

Verdict

Runebender covers a broad set of font editing tasks and supports several source and compiled formats. Its alpha status, source-based native installation, and in-place file writes call for a cautious workflow.

Runebender plans and pricing

All plans

Free and open source Free No cost · Alpha software · Native editor and experimental browser build runebender.org · 3 Oct 2026

Compared on font design software

Free plan: Yesrunebender.org
Variable fonts: Yesrunebender.org
Color fonts: Yesrunebender.org
Supported platforms: Web, macOS, Linuxrunebender.org
OpenType layout tools: Yesrunebender.org

Facts

What it does: Runebender is a font editor for UFO and Designspace font sources.runebender.org · 3 Oct 2026
Editing features: The documentation covers glyph editing, paths and filters, components and anchors, masters and interpolation, spacing and kerning, feature code, color fonts, text shaping, font info, and font checking.runebender.org · 3 Oct 2026
File support: It opens UFO, Designspace, Glyphs files and packages, and compiled TTF or OTF fonts; Glyphs files are converted to UFO, and compiled fonts are opened as UFOs in memory.runebender.org · 3 Oct 2026
Workflow formats: Runebender uses UFO and Designspace font source formats by default and can import Glyphs files, Glyphs packages, Babelfont packages, and compiled TTF and OTF fonts.runebender.org · 3 Oct 2026
AI features: Experimental local models can propose a heavier glyph master from a lighter one, while local chat is available through font-ml.runebender.org · 3 Oct 2026
AI privacy: The local model workflow runs on the user's machine and the documentation says drawings are not sent anywhere; it requires users to provide model files, which the editor does not download.runebender.org · 3 Oct 2026
Browser privacy and limits: The experimental WebAssembly browser editor runs locally without uploading files, but has documented interaction gaps and is not recommended for real work.runebender.org · 3 Oct 2026
Platforms: The FAQ says the code builds on Windows and Linux, while macOS is where it is used daily; the install guide describes the browser build as experimental.runebender.org · 3 Oct 2026
Installation: The project has no packaged release yet; the native application is installed from source with Cargo, and the browser build can be opened on the site.runebender.org · 3 Oct 2026
Stability and source safety: Runebender is alpha software and writes UFO and Designspace files in place, so its documentation advises keeping sources under version control and working on copies.runebender.org · 3 Oct 2026
Support: The FAQ directs users to open an issue in the project repository for help.runebender.org · 3 Oct 2026
License and project status: The FAQ says Runebender costs nothing and is licensed Apache-2.0 or MIT; it is maintained independently and is not an official Linebender project.runebender.org · 3 Oct 2026