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Having problems opening a COS2 file?

Learn about files with extension COS2

COS2 File - opening and understanding

Did your computer fail to open a COS2 file? We explain what they are used for and recommend software that we know can open or otherwise handle 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.

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How to open COS2 files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension COS2 for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 1 different COS2 openers which you will find listed below.

Suggest another file format using extension COS2

While we know of one file format using the .COS2 file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .COS2 file.

Various viewers for this file format

These apps are known to open certain types of COS2 files. Remember, different programs may use COS2 files for different purposes, so you may need to try out a few of them to be able to open your specific file.

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We have not verified any software that we know for certain will work with COS2-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with COS2-files. If you know one, please use the 'Suggest a program' link below and tell us about it!