.BAK File

.bak is Firefox Bookmarks Backup

Key Features: .BAK File Extension

Features	Description
File Extension	.bak
Format	N/A
Created by	Mozilla
Category	Backup

What's on this Page

How to open:
How to convert:

What is an .BAK file?

File extension bak is traditionally used for backups for decades.

Generally speaking, a bak file is a backup of original file, when the original extension is renamed to somename.bak. So, to restore original file, rename file to its original extension, if you know it, that is.

Many software apps also auto save with original documents or projects also a backup copy with the same file name.

How to open:

Unless you know the original file extension or software that created this bak file, is close to impossible to determine which program may open a *.bak file.

How to convert:

BAK files are often just renamed original files or previous versions of original file, so renaming the extension back to its original usually restores the functionalily.

Firefox Bookmarks Backup - File openers

Windows

Mozilla Firefox

Mac

Mozilla Firefox

How to solve problems with BAK files

Associate the BAK file extension with the correct application. On :
Windows: Right click on any BAK file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.BAK files". Mac: Right click (or Ctrl-click) the BAK 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 .BAK is Firefox Bookmarks Backup. Because only the current version supports the latest BAK file format. Search, therefore, e.g. on the Mozilla manufacturer website after an available .BAK is Firefox Bookmarks Backup update.
To make sure that your BAK file is not corrupted or virus-infected, get the file again and scan it with antivirus software.