.BAK File Extension

Firefox Bookmarks Backup

What is a BAK File?

A BAK file is a backup file format primarily used to store backup copies of important data to prevent data loss. Specifically, the bookmarks.bak file is created by Mozilla Firefox as a backup of the user's bookmarks. This file ensures that a user's bookmarks can be restored in case the primary bookmarks file gets corrupted or lost.

How to Open a BAK File

To open a bookmarks.bak file, simply replace the current bookmarks file in Firefox's profile folder with the bookmarks.bak file and rename it to bookmarks.html. Firefox will then load the bookmarks from this file when restarted.

Can BAK Files Be Converted?

While the bookmarks.bak file is not typically converted into other formats, it can be renamed and used directly by Firefox, or managed through various bookmark management tools.

Technical Information

File Extension.bak
File TypeBackup
Created byMozilla
Used byFirefox for bookmarks backup
Format TypeBinary
Default LocationWindows: C:\Documents and Settings\UserName\Application Data\MozillaFirefox\Profiles\[random-name]
macOS: /Users/[username]/Library/Application Support/Firefox/Profiles/[random-name].default

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