| enc4 | Samsung Kies Smartphone Encrypted Firmware |
| enpack | EnCase Package |
| enz | Cobian Backup Encrypted Data |
| eoz | EON Studio Project Archive |
| esa | Enveloc Secure Archive |
| esd | Windows 8 Upgrade Assistant Electronic Software Download |
| esj | Autodesk Fabrication Archived Job |
| exp | Cisco RV042 Configuration Backup |
| ez2 | EZPix Secure Photo Album Package |
| ez3 | EZPix Secure Photo Album Package |
| ezsetup | EasyBits Setup Package |
| fb | Slim! Compressed Archive |
| fbf | Free Backup Fix Backup Archive |
| fbu | FEBE Firefox Backup |
| fbw | HP Backup Segment |
| fcarch | Final Cut Pro Archive |
| fcx | FCX Archive |
| fcxe | FileCapsule Deluxe Encoded Archive |
| fea | FilZip Encrypted Archive |
| fez | FUND E-Z Backup Archive |
| fgz | Formula Graphics Presentation Archive |
| fim | Icon Heaven Icons Package |
| flatpak | Linux Flatpak Application Bundle |
| fota | Android Firmware Upgrade Package |
| fp8 | Fast PAQ8 Compressed File |
| fpkg | Mac OS X Installer Package |
| fqp | Flip-Q Package |
| frg | FrogTeacher Folder Package |
| fwa | Flex.Win Backup File |
| fwarc | FacetWin Disk Archive |
