File Extension BAK

  • Full name
    Backup Plus Backup Format
  • Developer
  • Popularity
Have you encountered a problem with a BAK file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a BAK file here. In the further part of this page we have added a list of programs that should open your BAK file. It is enough you choose a proper application for your operating system, download and install it.


The extension BAK is used by numerous programs to mark their backup files.

These files do not have a uniform format. The content depends entirely on the generating program. Any type of data may be included in the file.

Many programs use BAK files to back up an older version of a user-edited file. These files are usually only open with the program that created them.

The directory in which the file is located can provide an indication of which original file has the file and with which program it can be opened.

Exceptions are files in which the suffix BAK has been appended to the original end, e.g. textdatei.txt.bak. Then of course it suffices to remove the ending bak.

Programs which can open a BAK file

How to open a BAK file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the BAK file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a BAK file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support BAK files. At this point we are looking for disk space where the application was installed in and we can link it with a BAK file. Since then, our operating system will use the selected program to support all BAK files.

Other issues

Despite the described problem with BAK there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the BAK file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the BAK file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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