The .woff2 file format is a compressed font format used for web fonts. It stands for Web Open Font Format 2.0 and is an improvement over its predecessor, .woff (Web Open Font Format).

The .woff2 format was developed by the World Wide Web Consortium (W3C) to address the need for a more efficient font format that reduces file size and improves web page load times. It uses advanced compression techniques to achieve higher compression ratios compared to .woff.