HOW TO REPAIR CORRUPTED 3D MODELS FOR PRINTING

There are several ways to repair a 3D model. You’ll find that where sometimes one works and the other doesn’t, with a different model, different tools will successfully repair it. We’ll only focus on solutions that are free and easy to use:

Microsoft STL repair – online service
Meshmixer

Auto-repair – easy to use, but doesn’t always work
Make solid – that almost always works, but has its downsides

3D Builder – really easy to use and great tool, but only for Windows

Source: prusaprinters.org