Does the font look identical after conversion?

Yes. WOFF only wraps and compresses the existing font tables — no glyph data is changed, so rendering is byte-for-byte the same.

Can I convert an OTF too?

Yes. Both TrueType (.ttf) and OpenType (.otf) sfnt fonts can be wrapped into a WOFF container with this tool.

Are my files uploaded anywhere?

No. Everything is processed in your browser with WebAssembly and JavaScript — your files never leave your device.

Convert TTF to WOFF

Convert a .ttf font to WOFF for the web. Each font table is compressed and packed into a WOFF 1.0 container locally in your browser — nothing is uploaded.

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What is WOFF?

WOFF (Web Open Font Format) is a font wrapper designed for @font-face on the web. It is essentially a TrueType/OpenType font with each table compressed and some metadata added, so it downloads faster than a raw .ttf.

Why convert TTF to WOFF?

WOFF 1.0 is supported by every browser in use today and is a safe baseline for web fonts. Serving WOFF instead of a raw TTF reduces file size and signals a font intended for the web.

How the conversion works

Convertur reads the sfnt table directory, compresses each table with zlib, and assembles a valid WOFF 1.0 file. Tables that would not benefit from compression are stored as-is, exactly as the WOFF spec allows.

WOFF vs WOFF2

WOFF2 uses Brotli and is smaller still, but WOFF 1.0 has the widest reach and needs no extra decompression support. Ship WOFF as a fallback alongside WOFF2 for the best coverage.

How to ttf to woff

Drop a .ttf (or .otf) file into the zone above.
Press Convert to build the WOFF locally in your browser.
Download the .woff file.
Reference it from a @font-face rule in your CSS.

Related converters

OTF to TTFTurn an OpenType font into a TrueType font.Font subsetterKeep only the characters you need to shrink a font.Unzip ZIP filesOpen a .zip and download the files inside.Create ZIP filesBundle multiple files into one .zip download.