How to open AT3P files

Did your computer fail to open an AT3P file? We explain what AT3P files are and recommend software that we know can open or convert your AT3P files.

What is an AT3P file?

The AT3P file extension indicates to your device which app can open the file. However, different programs may use the AT3P file type for different types of data.

While we do not yet describe the AT3P 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 AT3P 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!

Various AT3P openers

These apps are known to open certain types of AT3P files. Since many different programs may use AT3P files for different purposes, you may need to try a few of the apps to open your specific AT3P 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 AT3P-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 AT3P-files. If you know one, please use the Suggest link below and tell us about it!