unicode-range-split
Split a CJK font in two: the glyphs you use, and the rest
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A CJK typeface is megabytes because it covers everything. unicode-range-split splits a font into two files: the characters your site actually uses, and everything else, with no glyph dropped. Ordinary pages fetch the small file; the other waits behind a unicode-range until a page uses a character from it. On its own demo, every page fetches 125 KiB instead of 5,632 KiB. Unlike subsetting, a rare kanji in someone's name still renders in your typeface. Free and open source.
PH · launched Nov 9, 2026 · 1 upvote (top 65%) · 0 views
Niche: typography and font tools · 123 launches, 7 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
- Open Source
- Typography
- Developer Tools
- GitHub
Visit website ↗ Source listing ↗
More like this: all 123 launches in typography and font tools →
Could you build this?
Partial Splitting a font with fontTools is doable with AI help, but guaranteeing that no glyph or OpenType feature is lost across the two files requires real font-engineering expertise.
What it would actually take: A real version would build on fontTools (pyftsubset or custom subsetting) to partition the cmap into a primary file and a unicode-range-gated file, and would need to generate the matching CSS. The hard parts are preserving GSUB/GPOS layout features, kerning, and variable-font tables across the split, and validating output byte-for-byte against the source font. A typography or font-tooling specialist is needed for that verification.
Competitors
Other products that read as similar to this one : 183 launches clear the similarity bar, closest 8 shown.
Attention rank: #75 of 184 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 374 days after the earliest competitor.
- css-composite-font · github · 2026-10-13 · 47 upvotes · similarity 0.62
- Unicode cursive font generator that checks cross-platform compatibility · hn · 2026-01-01 · 11 upvotes · similarity 0.49
- Fonti · ph · 2026-10-22 · 1 upvotes · similarity 0.47
- Split PDF by Aizen Labs · ph · 2026-10-31 · 1 upvotes · similarity 0.47
- cjkfold · github · 2026-10-13 · 203 upvotes · similarity 0.44
- One clean, developer-focused page for every Unicode symbol · hn · 2025-12-25 · 198 upvotes · similarity 0.43
- Accent Letters for Adobe Express · ph · 2026-09-30 · 2 upvotes · similarity 0.42
- Open Typography Foundation · ph · 2026-11-04 · 1 upvotes · similarity 0.42
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