fontverter

Convert Buffer instances back and forth between SFNT (TrueType/OpenType), WOFF, and WOFF2 formats.

Uses the WebAssembly-based wawoff2 and woff2sfnt-sfnt2woff modules under the hood, so no binaries or native modules are involved.

const fontverter = require('fontverter');

const mySfntFontBuffer = Buffer.from(/*...*/);
const myWoffFontBuffer = await fontverter.convert(mySfntFontBuffer, 'woff');
const myWoff2FontBuffer = await fontverter.convert(myWoffFontBuffer, 'woff2');

API

fontverter.convert(buffer, toFormat[, fromFormat]): Promise<Buffer>

Asynchronously convert a Buffer instance containing a font to another format.

toFormat and fromFormat can be either 'sfnt', 'woff', or 'woff2'.

If fromFormat is omitted, the source format will be detected based on the signature at the start of the buffer.

For backwards compatibility reasons, 'truetype' is supported as an alias for 'sfnt' in both toFormat and fromFormat.

Returns a promise that fulfills with the converted font as a Buffer instance, or rejected with an error. If toFormat is the same as the current format (as specified by fromFormat or detected), the original buffer instance will be returned without any conversion taking place.

fontverter.detectFormat(buffer): String

Returns the detected format of the font contained in buffer (either 'sfnt', 'woff', or 'woff2'), or throws an exception if the format could not be detected.

Releases

Changelog

License

3-clause BSD license -- see the LICENSE file for details.