The File Extensions Database


.FSK File Extension

  • Category: Emulator Files

What is an .FSK file?

.FSK is Atari 8-bit cassette image

The fsk file extension is used for files tin text-based format that stores Atari tapes as sequences of MARK (logical 1) and SPACE (logical 0) signals.

These files are used by the A8CAS project.

This fsk file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.


How to open:

Use any compatible emulator to work with *.fsk files.

How to convert:

Some tools are able to export *.fsk files to other image formats.

How to solve problems with FSK files

  • Associate the FSK file extension with the correct application. On :
    Windows: Right click on any FSK file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.FSK files". Mac: Right click (or Ctrl-click) the FSK file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .FSK is Atari 8-bit cassette image. Because only the current version supports the latest FSK file format. Search, therefore, e.g. on the manufacturer website after an available .FSK is Atari 8-bit cassette image update.
  • To make sure that your FSK file is not corrupted or virus-infected, get the file again and scan it with antivirus software.