.BAK File Extension

.BAK File Extension

File Type 1

Bookmarks Backup File

Developer N/A
Popularity
3.9  |  654 Votes
Category Backup Files
Format N/A

What is a BAK file?

A BAK file is a backup of a Google Chrome or Mozilla Firefox bookmarks file, which can be used to replace saved bookmarks in case the main bookmarks file becomes corrupt. It is automatically generated by the Chrome or Firefox web browser and is typically named bookmarks.bak.

More Information

If Chrome creates a bookmarks.bak file, it is located in the following directories with a Bookmarks text file in Windows and macOS:

  • Windows: C:Users\[username]\AppData\Local\Google\Chrome\User Data\Default
  • macOS: /Users/[username]/Library/Application Support/Google/Chrome/Default

If Firefox creates a bookmarks.bak file, it is located in the following directories with a Bookmarks text file in Windows and macOS:

  • Windows: C:\Documents and Settings\[username]\Application Data\Mozilla\Firefox\Profiles\[random-name]
  • macOS: /Users/[username]/Library/Application Support/Firefox/Profiles/[random-name].default
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Programs that open BAK files

Updated August 7, 2019
File Type 2

Backup File

Developer N/A
Popularity
3.7  |  150 Votes
Category Backup Files
Format Text and Binary

What is a BAK file?

A BAK file is a backup of another document or file, commonly created automatically by software programs or by the operating system. It typically 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
Original program used to create the file
Mac
Original program used to create the file
Updated February 21, 2019
File Type 3

ACT! Backup File

Developer The Sage Group
Popularity
3.4  |  62 Votes
Category Backup Files
Format Binary

What is a BAK file?

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
Free Trial
Updated July 9, 2015
File Type 4

Finale Backup File

Developer MakeMusic
Popularity
3.4  |  58 Votes
Category Backup Files
Format N/A

What is a BAK file?

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
Mac
Updated November 15, 2013
File Type 5

MobileTrans Backup File

Developer Wondershare
Popularity
3.4  |  46 Votes
Category Backup Files
Format N/A

What is a BAK file?

A BAK file is a backup file created by Wondershare MobileTrans, a program used to backup and transfer data from and to devices. It contains data backed up from a device, such as contacts, messages, calendar information, call logs, photos, music, videos, apps, and app data.

More Information

BAK files are the primary file type associated with MobileTrans. The file is created when backing up a phone to a computer. To do this in MobileTrans, click "Back Up Your Phone" on the homepage of the program, select the content to backup, and click "Start Transfer". The BAK file will then be created to store the backup data and placed in the following directory:

C:\Users\[username]\Wondershare\MobileTrans\Backup

To restore a BAK file to a device in MobileTrans, click "Restore From Backups" on the homepage of the program, click "MobileTrans", select the BAK file you want to restore, and click "Start Transfer".

Common BAK Filenames

[name of device]_[date]_[time].bak - Naming convention for BAK files created by MobileTrans.

Programs that open BAK files

Windows
Mac
Updated May 8, 2018
File Type 6

Terraria Backup File

Developer Re-Logic
Popularity
3.0  |  10 Votes
Category Game Files
Format N/A

What is a BAK file?

A BAK file is a backup file created by Terraria, a 2D action adventure and sandbox construction game. It contains a copy of a world (.WLD file) or a player (.PLR file) in Terraria. BAK files are used for storing a backup of a WLD or PLR in the event that the file becomes corrupt or lost.

More Information

BAK files created by Terraria are simply WLD or PLR files but with the .bak file extension added to the file. For example, a backup of the example.wld file appears as example.wld.bak. If you need to open the backup file in Terraria, remove the .bak extension and place the file in the appropriate folder.

WLD files should be placed in the following directory:

[user]\Documents\My Games\Terraria\Worlds\

PLR files should be placed in the following directory:

[user]\Documents\My Games\Terraria\Players\

Programs that open BAK files

Windows
Updated February 21, 2019
File Type 7

Microsoft SQL Server Database Backup

Developer Microsoft
Popularity
3.2  |  9 Votes
Category Database Files
Format N/A

What is a BAK file?

A BAK file is a backup of a Microsoft SQL Server database. It contains a copy of all or some of the files included within the database. BAK files are created using SQL Server Management Studio, Transact-SQL, or Windows PowerShell.

More Information

Database administrators use Microsoft SQL Server to store data within relational databases that reside on one or more servers. Because servers can fail and databases can become corrupted, administrators often create backups of their databases and store them on separate servers. That way, administrators can easily replace their original database with its backup if an issue arises. Database backups are saved as BAK files.

Sometimes, administrators create backups that contain only part of a database. These backups, known as differential backups or partial backups, are also saved with the .bak extension.

How do I open a BAK file?

You can open a BAK file and use it to restore a SQL Server database in Microsoft SQL Server Management Studio, which is included in Microsoft SQL Server. To do so, follow the instructions included in Microsoft's online SQL documentation.

Programs that open BAK files

Windows
Updated September 1, 2020
File Type 8

VEGAS Video Project Backup

Developer MAGIX
Popularity
4.3  |  4 Votes
Category Backup Files
Format N/A

What is a BAK file?

A BAK file is a backup file created by MAGIX VEGAS, a professional video-editing and disc-authoring application. It contains a copy of a VEGAS video project (.VEG file). VEGAS backup files use the extension .veg.bak.

More Information

In the event MAGIX VEGAS quits before you can manually save an in-progress video project, the program will automatically save that project as a BAK file. BAK files can be used to recover a project and save it as a VEG file.

Typically, VEGAS BAK files are located in the following directory:

C:/Users/YourUserName/AppData/Local/VEGAS Pro

How do I open a BAK file?

You can open a VEGAS BAK file in MAGIX VEGAS (Windows). To do so, change the file's extension from .veg.bak to .veg and then open the file in VEGAS.

Programs that open BAK files

Windows
Updated March 10, 2021

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