Opening COS2 files

Did your computer fail to open a COS2 file? We explain what COS2 files are and recommend software that we know can open or convert your COS2 files.

What is a COS2 file?

Files that contain the .cos2 file extension are primarily used by the Pinnacle Studio video editing software application. This software allows users to edit video media on their computer.

The COS2 files that are used by the Pinnacle Studio software are temporary cache files that are created by certain versions of this software program. These files contain information about a specific file resource, such as a WMA or WMV file.

The COS2 files on a user's computer are automatically created when Pinnacle Studio is being used in edit mode. When the file is no longer needed, it is normally deleted automatically by the computer application.

Software that will open, convert or fix COS2 files

These apps are known to open certain types of COS2 files. Since many different programs may use COS2 files for different purposes, you may need to try a few of the apps to open your specific COS2 file.

WinRARWinRARUser submitted
Movie MakerMovie MakerUser submitted
RealPlayerRealPlayerUser submitted
We have not verified any programs that we know for certain can work with COS2-files on Mac. If you know one, please use the Suggest link below and tell us about it!
We have not verified any online services that we know for certain can work with COS2-files. If you know one, please use the Suggest link below and tell us about it!