Font Subsetter
Subset TTF/OTF fonts to used characters and export TTF or WOFF — cut webfont weight by 90%. Ship 12 KB instead of 150 KB — local opentype.js work, unlimited saves.
Runs on opentype.js
How to Use the Font Subsetter
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Frequently Asked Questions
How small do subsets get?
Latin-only subsets land 85–95% smaller: 150 KB becomes ~12 KB. Biggest single webfont win available.
Which characters to keep?
Site's actual alphabet per language served — English plus each supported locale's set. Missing glyphs render tofu boxes, so audit coverage.
License check?
Many commercial licenses forbid subsetting or web use — verify rights before converting client fonts. Open fonts (OFL) subset freely.
Are fonts uploaded?
No — subsetting runs locally in your browser. Saves never touch a meter — downloads on local tools are unlimited.
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Last updated October 2026