Font
What is a .woff file?
A .woff file is a Web Open Font Format (version 1.0). This is a font file — a typeface your system can install and use.
How to open a .woff file
- Double-click it on Windows or Mac to preview and install.
- FontForge (free) opens and inspects unusual font formats.
The registry records this extension against Web Open Font Format, so software from that family is the most likely match.
How to convert a .woff file
- FontForge or an online converter turns older fonts into .ttf, .otf or .woff2.
MIME type
When a .woff file travels over the web, servers label it with this MIME type:
font/woffThe technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .woff.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| Web Open Font Format | 1.0 | font/woff | fmt/616 |