Solid Inspector2 is a free, open-source SketchUp extension that finds and repairs solid-geometry errors like non-solid groups and inverted faces.
Solid Inspector2 checks SketchUp groups and components for the errors that break solid modeling: non-solid geometry, stray or useless faces, inverted faces and hidden edges. It then offers automatic repair actions instead of leaving the fix to manual trial and error.
The extension is entirely free and open-source, requiring SketchUp 2014 or later. It fits a SketchUp user preparing a model for 3D printing or for export to a format that demands clean solid geometry, and pairs naturally with CleanUp3 for broader file tidying.
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Average
A free, open-source extension that catches solid-geometry errors before export or printing avoids costly rework at no cost itself.
It runs an inspection pass inside SketchUp with automatic repair actions, with no complex setup described beyond installing the extension.
It detects and repairs the stated solid-geometry issues (non-solid groups, inverted faces, stray or hidden edges) without a described workaround.
Scope is deliberately narrow to solid-geometry inspection and repair, which caps its ceiling against a general modeling toolset.
Neutral score: as a free, local plugin with no account data, export or portability concepts don't really apply and aren't covered by the sources.
