Font
What is a .mmm file?
A .mmm file is an Adobe Multiple Master Metrics font file. This is a font file — a typeface your system can install and use.
How to open a .mmm 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 Adobe Multiple Master Metrics font file, so software from that family is the most likely match.
How to convert a .mmm file
- FontForge or an online converter turns older fonts into .ttf, .otf or .woff2.
The technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .mmm.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| Adobe Multiple Master Metrics font file | — | — | fmt/521 |