Introducing Colr Pak - a free open source editor for COLR v0 and v1 fonts

Color Pak is a cross-platform desktop application for designing and editing color fonts. It is a fork of Fontra Pak, extended with dedicated tooling for COLRv0 and COLRv1 color font authoring — including a visual paint graph editor, palette management, and gradient handles directly on the canvas.

Your fonts stay entirely on your computer and are never uploaded anywhere

• COLRv1 Paint Graph Editor — visually compose  PaintSolid, PaintLinearGradient, PaintRadialGradient, PaintSweepGradient, PaintGlyph, PaintTranslate, PaintScale, PaintRotate, PaintSkew, and PaintTransform nodes per glyph.
• COLRv0 Layer Mapping — manage color layer stacks with palette index assignments for simpler color fonts.
• One-click COLRv0 → COLRv1 Upgrade — automatically convert an existing v0 layer mapping into an equivalent COLRv1 PaintColrLayers structure.
• Masterless COLRv1 Variation (WIP) — author variable color parameters (gradient stops, transform values, alpha) as independent per-axis keyframes, without requiring separate outline masters.
• Live Canvas Rendering — see COLRv1 paint effects rendered in real time on the glyph canvas as you edit.
• Palette Management — define and switch between multiple color palettes; the active palette is reflected immediately in the canvas preview.
• Full Fontra Editing Core — all standard Fontra editing features (glyph drawing, variable font axes, anchors, components, etc.) are included.