3D Viewer
3D File Viewer
View most 3D files
This uses OCCT and AssImp for loading the files so the list of supported formats is quite comprehensive.

Should work on Windows, MacOS and Linux.
Repository
GitHub - cskilbeck/3D-Viewer: 3D file viewer
3D file viewer. Contribute to cskilbeck/3D-Viewer development by creating an account on GitHub.
This was sort of vibe coded so not much so say about it here - I had Claude lobotomize Gerber Viewer as a starting point before adding in the 3D viewer functionality.