ttf2woff2-wasm

Convert TTF fonts to WOFF2 format. WASM build of 0x6b/ttf2woff2.

Drop-in replacement for nfroidure/ttf2woff2 with zero native dependencies.

[!NOTE] This package uses a different Brotli implementation, so the output may differ in size from nfroidure/ttf2woff2. Please verify the output fonts work correctly in your target environment before deploying to production.

Installation

$ npm install @0x6b/ttf2woff2-wasm

Usage

const ttf2woff2 = require("@0x6b/ttf2woff2-wasm");
const fs = require("fs");

const ttf = fs.readFileSync("font.ttf");
const woff2 = ttf2woff2(ttf);
fs.writeFileSync("font.woff2", woff2);

Migration from nfroidure/ttf2woff2

package.json:

-"ttf2woff2": "^3.0.0"
+"@0x6b/ttf2woff2-wasm": "^0.10.3"

Your code:

-const ttf2woff2 = require('ttf2woff2');
+const ttf2woff2 = require('@0x6b/ttf2woff2-wasm');

const woff2 = ttf2woff2(ttfBuffer);

API

ttf2woff2(input: Buffer | Uint8Array): Buffer

Convert TTF font data to WOFF2 format synchronously.

Benchmark

Compared with ttf2woff2 v8.0.0 on Apple M4 Pro:

Conversion Performance

WarpnineSans-Regular.ttf (269 KB)
  native: avg=930ms  mem=45.9 KB
  wasm:   avg=387ms  mem=21.3 KB
  → 2.4x faster, 2.2x less memory

NotoSansJP-Medium.ttf (5.5 MB)
  native: avg=13592ms  mem=20.6 KB
  wasm:   avg=7807ms   mem=11.4 KB
  → 1.7x faster, 1.8x less memory

Run locally: cd bench && npm install ttf2woff2 && node --expose-gc benchmark.cjs

Package Size

| Package | Installed | | ---------------------- | --------- | | ttf2woff2-wasm v0.10.3 | 972 KB | | ttf2woff2 v8.0.0 | 11 MB |

11x smaller installed size (no native compilation needed).

License

• The Noto Sans Japanese font in tests/fixtures/ is licensed under OFL.
• The WarpnineSans font in tests/fixtures/ is licensed under OFL.
• Everything else is dual-licensed under MIT or Apache-2.0.