There are several places to find this extension, but only two are recommended. as they often host outdated versions or malware.
This is the safest and recommended method for most users. solid inspector 2 sketchup download
SketchUp is a surface modeler, not a solid modeler by default. This makes it easy to accidentally leave an edge floating or create a double wall. Without Solid Inspector², finding a single microscopic hole in a complex 100,000-polygon model is nearly impossible. For users utilizing the Outer Shell There are several places to find this extension,
[Your Name] Date: [Current Date] Subject: Legitimate acquisition, installation, and functionality of Solid Inspector 2 for SketchUp solid inspector 2 sketchup download
: Sometimes geometry is too messy for an auto-fix. You may need to redraw a small section.