| Extension | Description | File Type |
|---|
| e2p | PonyProg Device File | Developer Files |
| ecf | Outlook Add-on File | Misc Files |
| ecf | Exchange Extended Configuration File | Settings Files |
| ecm | Error Code Modeler File | Disk Image Files |
| edb | Exchange Information Store Database File | Data Files |
| efi | Extensible Firmware Interface File | System Files |
| egg | ALZip Copmpressed File | Archived Files |
| egisenc | eDataSecurity Encrypted File | Encrypted Files |
| eix | Metin 2 Game File | Game Files |
| elf | Executable Game Data File | Game Files |
| emc | Striata Encrypted E-mail Attachment File | Encrypted Files |
| eml | Email Message File | Misc Files |
| emu | Bitcom Data File | Misc Files |
| emulecollection | eMule Plus Data File | Misc Files |
| emz | Windows Compressed Enhanced Metafile | Graphic Files |
| enc | Encoded File | Encoded Files |
| eng | English Language File | Misc Files |
| ens | Ensemble File | Audio Files |
| env | Adobe Acrobat Dictionary File | Misc Files |
| enw | EndNote Import File | Misc Files |
| epf | Encapsulated Postscript File | 3D Files |
| epk | Metin 2 Game Data File | Game Files |
| eps | Encapsulated Postscript | Graphic Files |
| epub | Open Electronic Book File | Text Files |
| err | Visual FoxPro Error File | Text Files |
| ert | Heroes of Might & Magic Script File | Game Files |
| esm | Elder Scrolls Game File | Game Files |
| esp | ACD/Labs Data File | Data Files |
| ess | Easy Spreadsheet Spreadsheet File | Spreadsheet Files |
| et | Easitech Lesson Data File | Data Files |
| etl | Microsoft Event Trace Log File | Data Files |
| ets | eSignal Time and Sales File | Misc Files |
| ex | Norton Ghost Template File | 3D Files |
| ex4 | Expert Advisor File | Data Files |
| exd | Control Information Cache File | Misc Files |
| exe | Executable File | Executable Files |
| exp | Export File | Data Files |
| ext | Norton Commander Extension | Misc Files |
| ex_ | Compressed Executable File | Executable Files |