How to open FO files

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

What is a FO file?

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

While we do not yet describe the FO 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 FO 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 FO

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

Software602 Form FillerSoftware602 Form FillerUser submitted
Oxygen XML EditorOxygen XML EditorUser submitted
ACS2000ACS2000User submitted
Oxygen XML DeveloperOxygen XML DeveloperUser submitted
602XML Filler602XML FillerUser submitted
Old Mutual Front OfficeOld Mutual Front OfficeUser submitted
602XML Designer Express602XML Designer ExpressUser submitted
XF DesignerXF DesignerUser 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 FO-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 FO-files. If you know one, please use the Suggest link below and tell us about it!