No. Everything runs in this browser tab on your own device. Engines are downloaded once and cached, but your files never leave your computer.

No. OTF uses CFF outlines, which this engine can read but not write. TTF works everywhere OTF does.

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Home / Fonts / Font Converter

Font Converter

Convert fonts between TTF, OTF, WOFF, WOFF2, EOT and SVG, with ready-to-paste @font-face CSS.

Free, no uploads, no sign-up. Runs 100% in your browser.

How Font Converter works

Fonts are parsed and rewritten with fonteditor-core. WOFF2 uses Google's Brotli-based WOFF2 encoder compiled to WebAssembly. OTF (CFF) fonts are read and saved with TrueType outlines. A fonts.css file with @font-face rules is generated for you.

Input: TTF, OTF, WOFF, WOFF2, EOT, SVG. Output: WOFF2, WOFF, TTF, EOT, SVG, CSS.

How to use Font Converter

Drop one or more font files.
Tick the formats you want.
Press Convert and download the ZIP with the fonts and CSS.

Tips

WOFF2 alone covers every modern browser and is the smallest.
Check the font licence before you host it on a website.

Font Converter FAQ

Is my file uploaded?: No. Everything runs in this browser tab on your own device. Engines are downloaded once and cached, but your files never leave your computer.
Can it output OTF?: No. OTF uses CFF outlines, which this engine can read but not write. TTF works everywhere OTF does.
Are my files uploaded?: No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
Is it free? Are there limits or watermarks?: Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
Does it work offline?: Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Related tools

Font Viewer & Inspector: Inspect TTF, OTF, WOFF and WOFF2 fonts: glyph grid, metrics, name table, OpenType features and a live type tester.
Font Subsetter: Keep only the characters you need from a font and save a tiny WOFF2, WOFF or TTF with matching unicode-range CSS.