How to open STO files

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

What is a STO file?

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

While we do not yet describe the STO 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 STO 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 STO

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

PRO100PRO100User submitted
Shredder ClassicShredder ClassicUser submitted
Unipro UGENEUnipro UGENEUser submitted
PRO100 DemoPRO100 DemoUser submitted
MAP DesignerMAP DesignerUser submitted
AXPrint22AXPrint22User submitted
StoreStoreUser submitted
Deep Shredder UCIDeep Shredder UCIUser submitted
TOPTOPUser submitted
Shredder Classic ctShredder Classic ctUser submitted
Infinty Engine Editor ProInfinty Engine Editor ProUser submitted
DVToolsDVToolsUser submitted
Story Lite with Java LibraryStory Lite with Java LibraryUser submitted
Shredder UCIShredder UCIUser submitted
ProStoProStoUser 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 STO-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 STO-files. If you know one, please use the Suggest link below and tell us about it!