WOFF / WOFF2
Web Open Font Format
WOFF (Web Open Font Format) was developed in 2010 to package TrueType and OpenType fonts for efficient delivery over the web. A WOFF file wraps the font data with a compressed container and mandatory metadata. WOFF2, released in 2018, adds Brotli compression and achieves roughly 30% smaller file sizes than WOFF. Both formats are used exclusively in web contexts via the CSS @font-face rule; browsers expose the font to page rendering but do not allow direct download of the underlying font data.
| File extensions | .woff, .woff2 |
| MIME type | font/woff |
| Developer | W3C / Mozilla |
| First released | 2010 |
| Category | Other |
| Open standard | Yes |
What opens WOFF / WOFF2 files
- All modern web browsers (embedded via CSS @font-face)
- Font management utilities
Browse File Formats
Reference details for 53 file formats — extensions, MIME types, what opens each one, and how they convert.
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