How to open 1CS files

Did your computer fail to open a 1CS file? We explain what 1CS files are and recommend software that we know can open or convert your 1CS files.

What is a 1CS file?

The 1CS file extension indicates to your device which app can open the file. However, different programs may use the 1CS file type for different types of data.

While we do not yet describe the 1CS 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 1CS 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 1CS

These apps are known to open certain types of 1CS files. Since many different programs may use 1CS files for different purposes, you may need to try a few of the apps to open your specific 1CS file.

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Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

We have not verified any programs that we know for certain can work with 1CS-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 1CS-files. If you know one, please use the Suggest link below and tell us about it!