File Extension KEY

  • Full name
    Licence Or Encrypted Security Format
  • Developer
  • Popularity
Have you encountered a problem with a KEY 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 KEY file here. In the further part of this page we have added a list of programs that should open your KEY file. It is enough you choose a proper application for your operating system, download and install it.


Files with the extension KEY are used by numerous programs to store registration information or license keys. The files are mostly encrypted and the content depends on the generating program. These files are useless without the associated application. They are usually in the same directory as the software itself.

Programs which can open a KEY file

How to open a KEY file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the KEY 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 KEY 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 KEY files. At this point we are looking for disk space where the application was installed in and we can link it with a KEY file. Since then, our operating system will use the selected program to support all KEY files.

Other issues

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

- verify that the KEY 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 KEY 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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