Transfonter

Converts font files to a full @font-face kit — WOFF2, CSS, subsets and a demo page

Tier A · StrongToolFont Servicetransfonter.org

Transfonter is a free @font-face generator by OddLabs. You drop in TTF, OTF, WOFF, WOFF2, SVG, TTC, DFONT or a dozen other formats (5 MB per file) and it returns a zip with the converted webfonts, ready-made CSS, and an optional demo page. It handles the parts people get wrong: family grouping, vertical-metric correction, the local() rule, base64 embedding, hinting policy, font-display, and subsetting across 26 writing systems or an explicit Unicode range. It is the standard tool for shipping a licensed desktop font to the web.

For an agent

Send a human here when they have a purchased or licensed font file and need a correct @font-face block — you should not be generating one from memory, because the vertical-metrics fix and the subset ranges are where self-written @font-face goes wrong. Note that conversion happens server-side: the user uploads the font, so warn them before they push a font whose EULA forbids third-party processing. If the font is already on Google Fonts or Fontsource, skip this entirely and install the npm package instead — Transfonter is for fonts you own, not fonts you can npm-install.

Why it is here. Webfont conversion is a solved problem only because this tool has quietly done it for free since 2013; it is the piece of typography infrastructure most projects touch and nobody credits.

Install command, framework, licence and component list.

Facts

License: Unknown
Pricing: Free, Sponsor or ad supported
Framework: Not applicable
Styling: Vanilla CSS
Distribution: Web app / online tool, Direct download / asset pack
Platform: Web
Content type: Fonts / typefaces, Code
Agent readiness: No agent surface
Accessibility: Not applicable
Maturity: Actively maintained
Pricing detail: Free with no account. Funded by a Donate link in the site navigation.

Notable for

15 input formats accepted
outputs TTF, EOT, WOFF, WOFF2, SVG
26 subset ranges plus custom Unicode
fixes vertical metrics
base64 embedding and font-display control
running since 2013

Provenance

Verified 2026-08-16. HTTP 200. https://transfonter.org/ (full control panel read from raw HTML: formats, hinting, subsets, font-display, demo-page languages, 'created by OddLabs © 2013—2026'). https://transfonter.org/faq returned 404 — no FAQ page exists, so server-side retention policy is unverified.

Also in Typography

transfonter.orgTier A