.BAK File Extension
File Type 1Firefox Bookmarks Backup
| Developer | Mozilla |
| Popularity |
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| Category | Backup Files |
| Format | N/A
UnknownFile format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined. |
What is a BAK file?
A BAK file is a backup of the Firefox bookmarks file, which can be used to replace saved bookmarks in case the main bookmarks file becomes corrupted. It is automatically generated by the Firefox web browser and typically named "bookmarks.bak".
The bookmarks.bak file is located in the following directories on Windows and Macintosh systems:
- Windows -
C:\Documents and Settings\UserName\Application Data\MozillaFirefox\Profiles\[random-name] - Mac -
/Users/[username]/Library/Application Support/Firefox/Profiles/[random-name].default
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File Type 2Backup File
| Developer | N/A |
| Popularity |
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| Category | Backup Files |
| Format | Text and Binary
Text and BinaryThis file is saved in a plain text format or a binary format. If in a plain text format, it can be viewed with a text editor. |
.BAK File Association 2
A BAK file is a backup of another document or file, commonly created automatically by software programs or by the operating system. The file most often just contains a copy of the original file and can be restored to the original by replacing the ".bak" extension with the original extension.
Often BAK files are created by simply appending ".bak" to the original filename. For example, document.doc may have a backup file document.doc.bak.
NOTE: An example program that uses the ".bak" extension is AutoCAD. Windows may also create BAK files for the System.ini and Win.ini files.
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File Type 3Finale Backup File
| Developer | MakeMusic |
| Popularity |
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| Category | Backup Files |
| Format | N/A
UnknownFile format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined. |
.BAK File Association 3
File created by Finale, a music notation application for playing instruments, vocals, etc.; replaced by the .BAKX file, which was released in Finale 2014; contains backup data for .MUS files; created when MUS files are saved by the user.
To create a BAK file:
- You must first enable the backup creation option.
- Select .
- Select "Save and Print" in the list on the left of the "Preferences" window, check the "Make Backups When Saving Files" checkbox, and click .
- Now when you save your MUS file, a BAK file will be created.
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File Type 4ACT! Backup File
| Developer | The Sage Group |
| Popularity |
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| Category | Backup Files |
| Format | Binary
BinaryThis file is saved in a binary format, which requires a specific program to read its contents. |
.BAK File Association 4
Backup file created by ACT!, an application used for customer relationship management (CRM); contains a backup of CRM data, which includes customer information such as names, address information, and history.
ACT! BAK files are used for restoring data in the event the CRM data is lost. They are usually created on a periodic basis and when upgrading ACT! software.
NOTE: Sage ACT! became Swiftpage Act! in 2013.
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