How to open AO2 files

Did your computer fail to open an AO2 file? We explain what AO2 files are and recommend software that we know can open or convert your AO2 files.

What is an AO2 file?

The AO2 file extension indicates to your device which app can open the file. However, different programs may use the AO2 file type for different types of data.

While we do not yet describe the AO2 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 AO2 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 AO2

These apps are known to open certain types of AO2 files. Since many different programs may use AO2 files for different purposes, you may need to try a few of the apps to open your specific AO2 file.

Activstudio3Activstudio3User submitted
ActivstudioActivstudioUser 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 AO2-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 AO2-files. If you know one, please use the Suggest link below and tell us about it!