Why convert WOFF2 back to TTF?

WOFF2 is a web-only wrapper around a TrueType or OpenType font, compressed with Brotli. Desktop apps, font editors, and operating-system installers expect a raw TTF or OTF, so you often need to unwrap a web font for local use.

Is the font uploaded to a server?

No. The file is read with FileReader and decompressed with the browser's built-in DecompressionStream. The conversion happens entirely on your device and nothing is transmitted.

Why might conversion fail in my browser?

WOFF2 tables are Brotli-compressed. Most modern browsers expose Brotli through the native DecompressionStream API, but a few older builds do not. If your browser lacks native Brotli support the tool will tell you, and you can retry in an up-to-date Chrome, Edge, or Firefox.

Does the output keep all glyphs and OpenType features?

Yes — decompression is lossless. Every glyph, kerning pair, and OpenType layout table the WOFF2 contained is restored bit-for-bit into the SFNT output, except that WOFF2's optional glyf transform is reversed during reconstruction.

Will the converted file be a .ttf or .otf?

It matches the original. If the WOFF2 wrapped a TrueType outline font the output is a TTF; if it wrapped a CFF (PostScript) font the signature is OTTO and you should save it as .otf.

WOFF2 to TTF Converter

A WOFF2 file is not a different font format — it is a TrueType or OpenType font wrapped in a web-delivery container and Brotli-compressed for small download size. To use that font on the desktop, in a font editor, or in any tool that expects a raw SFNT, you need to unwrap it back to a .ttf (or .otf). This converter does that entirely in your browser.

How it works

The tool reads the WOFF2 header, which records the original SFNT flavour (TrueType 0x00010000 or CFF OTTO), the table count, and the total decompressed size. It then reads the table directory, where each entry’s tag and lengths are stored using WOFF2’s compact null-flag encoding, followed by a single Brotli-compressed block containing every table’s data concatenated together.

The browser’s native DecompressionStream expands that Brotli block. The tool then walks the table directory, slices each table out of the decompressed buffer, rebuilds a standard 12-byte SFNT offset table plus 16-byte directory records (with correct 4-byte alignment and checksums), and concatenates everything into a valid TrueType/OpenType binary that downloads directly.

Notes and limits

Decompression is lossless — every glyph and layout table is preserved.
WOFF2’s optional glyf/loca transform is reversed so the glyf table is restored to its standard form.
This relies on the browser’s native Brotli support in DecompressionStream. Up-to-date Chrome, Edge, and Firefox include it; the tool reports clearly if your browser does not.
Respect the font’s licence: unwrapping a web font does not grant desktop-use rights — check the foundry’s EULA.