by Cole 3D·Modeling
Images © Cole 3D. Used for product review; image policy.
Stands out in the superhive library because it validates topology live in the viewport and pairs each one-click fix with the manual Blender steps, so it serves as a learning aid as well as a cleanup tool.
Mesh Check runs inside Blender's viewport and marks topology problems in 3D, exactly where they sit, without exporting to a separate validator. It uses color-coded overlays: n-gons in orange, boundary or open edges in cyan, coincident vertices with live counts in red, loose geometry in yellow, inconsistent normals in purple, plus non-applied object scale. Its flipped-normal detection uses Blender's own Recalculate Outside logic, so a clean mesh flags nothing and only faces that are genuinely reversed get marked.
Scanning is live and throttled. A compact viewport HUD shows issue totals and how many meshes are affected, and clicking the status badge toggles monitoring on or off. A per-mesh breakdown in the sidebar lets you click any mesh name to select it instantly, with the current selection highlighted, and it inspects multiple objects at once.
Targeted fix buttons appear only for the issues on your current selection. Fix All Selected cleans every selected mesh in one pass, and Fix All in Scene handles every flagged mesh at once. Each fix shows the manual Blender equivalent, and all fixes are fully undoable using Blender's native operators.
Mesh Check is best for modelers, game and asset artists, and anyone prepping meshes for export, baking, or 3D printing who wants clean topology without breaking flow.
Mesh Check is completely free to download and use.
Mesh Check requires Blender 5.0 and newer, with listed compatibility spanning Blender 5.0 to 5.2. It installs as a modern Blender Extension, so you can add it through Install from Disk or by dragging and dropping the .zip into Blender. Once enabled, it runs inside the viewport and scans your meshes live rather than through a separate validator. If you're on an earlier Blender release, check the developer's page to confirm current version support before installing.
Mesh Check shows targeted fix buttons that appear only for the issues on your current selection. Fix All Selected cleans every selected mesh in one pass, while Fix All in Scene handles every flagged mesh at once. Every fix is fully undoable because it relies on Blender's native operators, and each one also displays the manual Blender equivalent, so you can see how the same result is achieved by hand. That makes it useful both as a cleanup tool and as a way to learn the steps.
Mesh Check detects inconsistent normals using Blender's own Recalculate Outside logic, marking affected faces in purple. Unlike simpler checkers, it pinpoints only the faces that are genuinely wound the wrong way rather than the whole mesh, so a clean mesh flags nothing. Alongside normals it catches n-gons, boundary or open edges, coincident vertices with live counts, loose geometry, and non-applied object scale, each shown with its own color-coded overlay directly in the viewport where the problem sits.
Mesh Check is listed as free here in the catalog. Licensing and pricing can change, so check the developer's page for the current terms before you rely on that. The add-on is distributed under the GPL license and installs as a modern Blender Extension through Install from Disk or by dragging and dropping the .zip. A demo video is also available if you want to see more before deciding on it.
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