Font
What is a .otf file?
A .otf file is an OpenType Font File. This is a font file — a typeface your system can install and use.
How to open a .otf 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 OpenType Font File, so software from that family is the most likely match.
How to convert a .otf file
- FontForge or an online converter turns older fonts into .ttf, .otf or .woff2.
MIME type
When a .otf file travels over the web, servers label it with this MIME type:
font/otfThe technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .otf.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| OpenType Font File | — | font/otf | fmt/520 |