Free viewing functionality: Many programs have multiple features and functions locked behind paywalls. We chose ones that allow users to view files for free.

Popular CAD formats support: CAD is a big world with many different file formats. Just some of the formats include DWG, DXF, DWF, HPGL, OBJ, and STL. We chose a group of viewers that cover as many format bases as possible.

Ease of use: The user comes first. So, if a viewer requires you to take hours to learn how to use it, we didn’t include it.