.$EFS File

.$efs is Encrypted EFS data

Key Features: .$EFS File Extension

Features	Description
File Extension	.$efs
Format	N/A
Created by	Microsoft Corporation
Category	Encoded and encrypted

What's on this Page

How to open:
How to convert:

What is an .$EFS file?

The $efs file extension is mainly related to EFS files encrypted in Microsoft Office Word 2003.

In order to decrypt these files you need a proper certificate from the original creator of the document. EFS is short for encrypted file system.

This $efs file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

How to open:

Use Microsoft Word 2003 to work with *.$efs files.

How to convert:

There is no way how to convert the encrypted *.$efs files. However, after decoding the *.$efs files, original files can be converted.

How to solve problems with $EFS files

Associate the $EFS file extension with the correct application. On :
Windows: Right click on any $EFS file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.$EFS files". Mac: Right click (or Ctrl-click) the $EFS file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
Update your software that should actually open .$EFS is Encrypted EFS data. Because only the current version supports the latest $EFS file format. Search, therefore, e.g. on the Microsoft Corporation manufacturer website after an available .$EFS is Encrypted EFS data update.
To make sure that your $EFS file is not corrupted or virus-infected, get the file again and scan it with antivirus software.