Home : File Types : BAK File (4 File Associations)

.BAK File Extension

File Type 1Firefox Bookmarks Backup

DeveloperMozilla
Popularity
3.8 (175 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryBackup Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

What is a BAK file?

Backup of the Firefox bookmarks file; can be used to replace saved bookmarks in case the main bookmarks file becomes corrupted; automatically generated by the Firefox Web browser; typically named "bookmarks.bak"

More Information

The bookmarks.bak file is located in the following directories on Windows and Macintosh systems:

Windows
C:\Documents and Settings\UserName\Application Data\Mozilla\Firefox\Profiles\[randon-name]
Mac
/Users/[username]/Library/Application Support/Firefox/Profiles/[random-name].default

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Programs that open BAK files
Windows
Mozilla Firefox
Mac
Mozilla Firefox
Updated 4/21/2009

File Type 2Backup File

DeveloperN/A
Popularity
3.8 (76 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryBackup Files
FormatText and Binary

Text and Binary

This 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.

More Information

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.

Programs that open BAK files
Windows
Autodesk AutoCAD 2017
Microsoft SQL Server 2016
Original program used to create the file
Mac
Original program used to create the file
Updated 5/24/2016

File Type 3ACT! Backup File

DeveloperThe Sage Group
Popularity
3.5 (29 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryBackup Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.BAK File Association 3

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.

More Information

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.

Programs that open BAK files
Windows
Swiftpage Act!
Updated 7/9/2015

File Type 4Finale Backup File

DeveloperMakeMusic
Popularity
3.2 (24 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryBackup Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

.BAK File Association 4

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.

More Information

To create a BAK file:

  1. You must first enable the backup creation option.
  2. Select Finale [version] → Preferences....
  3. Select "Save and Print" in the list on the left of the "Preferences" window, check the "Make Backups When Saving Files" checkbox, and click OK.
  4. Now when you save your MUS file, a BAK file will be created.
Programs that open BAK files
Windows
MakeMusic Finale
Mac
MakeMusic Finale
Updated 11/15/2013

.BAK Extension Information

This page contains information about the file extension BAK and its known file associations. Our goal is to help you understand what a *.bak file is and how to open it.

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