.woff2 File — Web Open Font Format 2

WOFF2 (Web Open Font Format 2.0) is the successor to WOFF, providing significantly improved compression using the Brotli algorithm specifically tuned for font data. Standardized by the W3C in 2018, WOFF2 typically achieves 30% better compression than WOFF (and up to 50% for some fonts), resulting in faster font loading and reduced bandwidth consumption. WOFF2 uses a preprocessing step that transforms font data tables to improve compressibility before applying Brotli compression. The format is now supported by all modern browsers (Chrome, Firefox, Safari, Edge) and has become the recommended format for web fonts. Google Fonts, Adobe Fonts, and most web font services serve WOFF2 as their primary format. WOFF2 preserves all OpenType features and is suitable for variable fonts, which allow a single font file to contain an entire family of weights, widths, and styles through continuous axes. For maximum browser compatibility, web developers typically include WOFF2 as the primary source with WOFF as a fallback, though WOFF2-only strategies are increasingly practical. The format's efficient compression is particularly beneficial for CJK (Chinese, Japanese, Korean) fonts that contain thousands of glyphs.