Home : File Types : BAK File

.BAK File Extension

File Type 1Firefox Bookmarks Backup

DeveloperMozilla
Popularity
3.9 (554 Votes)
CategoryBackup Files
FormatN/A

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".

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\MozillaFirefox\Profiles\[random-name]
  • Mac -
    /Users/[username]/Library/Application Support/Firefox/Profiles/[random-name].default
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Programs that open BAK files
Updated 9/20/2017

File Type 2Backup File

DeveloperN/A
Popularity
3.8 (127 Votes)
CategoryBackup Files
FormatText and Binary

.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. 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
Autodesk AutoCAD 2018
Microsoft SQL Server 2016
Original program used to create the file
Mac
Original program used to create the file
Updated 2/21/2019

File Type 3ACT! Backup File

DeveloperThe Sage Group
Popularity
3.5 (52 Votes)
CategoryBackup Files
FormatBinary

.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
3.5 (48 Votes)
CategoryBackup Files
FormatN/A

.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
Updated 11/15/2013

File Type 5MobileTrans Backup File

DeveloperWondershare
Popularity
3.4 (21 Votes)
CategoryBackup Files
FormatN/A

.BAK File Association 5

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
Updated 5/8/2018

File Type 6Terraria Backup File

DeveloperRe-Logic
Popularity
1.5 (2 Votes)
CategoryGame Files
FormatN/A

.BAK File Association 6

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
Updated 2/21/2019

About BAK Files

Our goal is to help you understand what a file with a *.bak suffix is and how to open it.

All file types, file format descriptions, and software programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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