How to open 123DX files

Did your computer fail to open a 123DX file? We explain what 123DX files are and recommend software that we know can open or convert your 123DX files.

What is a 123DX file?

The 123DX file extension indicates to your device which app can open the file. However, different programs may use the 123DX file type for different types of data.

While we do not yet describe the 123DX 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 123DX 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 123DX

These apps are known to open certain types of 123DX files. Since many different programs may use 123DX files for different purposes, you may need to try a few of the apps to open your specific 123DX file.

123D Design123D DesignUser 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 123DX-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 123DX-files. If you know one, please use the Suggest link below and tell us about it!