How to open CYO files

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

What is a CYO file?

The CYO file extension indicates to your device which app can open the file. However, different programs may use the CYO file type for different types of data.

While we do not yet describe the CYO file format and its common uses, we do know which programs are known to open these files, as we receive dozens of suggestions from users like yourself every day about specific file types and which programs they use to open them.

We are continually working on adding more file type descriptions to the site, so if you have information about CYO files that you think will help others, please use the Update Info link below to submit it to us - we'd love to hear from you!

Generic CYO

Unfortunately, we have not received enough suggestions for software that can open CYO files yet. If you know one, please use the Suggest a Program link below so we can update the page. Thanks!

Try a universal file viewer

Since we do not have any programs listed that we have verified can open CYO files, we suggest that you try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and very likely yours too! Download Free File Viewer.