How to open CALS files

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

What is a CALS file?

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

While we do not yet describe the CALS 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 CALS 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 CALS

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

Paint Shop ProPaint Shop ProUser submitted
Corel PaintShop ProCorel PaintShop ProUser submitted
MysticThumbsMysticThumbsUser submitted
WinCDEmuWinCDEmuUser submitted
XnViewXnViewUser submitted
CompuPic ProCompuPic ProUser submitted
progeCAD ProfessionalprogeCAD ProfessionalUser submitted
3DBrowser3DBrowserUser submitted
Jasc Paint Shop ProJasc Paint Shop ProUser submitted

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 CALS-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 CALS-files. If you know one, please use the Suggest link below and tell us about it!