| extension name | file type | Classification |
|---|---|---|
| F3F | Crazy Machines Font File | font file |
| FEA | AFDKO Feature Definitions File | font file |
| FFIL | Mac Font Suitcase | font file |
| FNT | Windows Font File | font file |
| FON | Generic Font File | font file |
| FOT | Font Resource File | font file |