Mesh Doctor for STL

The repair welds vertices, removes degenerate faces and unifies normals. It does not invent surfaces to fill holes — your details stay exactly as modeled; use Server Mesh Repair for simple hole filling.

Yes — analysis and repair are local.

No — the repair welds vertices by position, removes degenerate faces and unifies normals; real holes are left untouched. Use server-side mesh repair when you need hole filling.

No — point clouds (.xyz, .pcd and faceless PLY) are rejected with a clear message. Convert the data to a mesh format such as STL or OBJ first.

Mesh Doctor runs entirely in your browser — nothing uploaded, no sign-in, no quota — and repairs by welding vertices by position, removing degenerate faces and unifying normals. Server Mesh Repair runs in the Vecaria cloud (sign-in and Pro quota, jobs up to ~10 minutes) and additionally fills real holes and converts formats, so it suits models too large or too damaged for the browser. Check here; go server-side when actual hole filling is what you need.

3D Model Analysis measures — triangle and vertex counts, bounding box, area, volume and printability checks — but never modifies the mesh. Mesh Doctor finds topology defects (holes, non-manifold edges, degenerate faces, watertightness), marks them in the viewport and repairs them into a clean STL. A common flow: analyze first, then repair here if defects show up.

Load STL, OBJ, PLY, 3MF, GLB or GLTF. The repair exports STL — the slice-ready format most printers expect. Point clouds (.xyz, .pcd and faceless PLY) are rejected with a clear message; convert to a mesh format first.

The 3D viewport draws hole boundary edges in red and non-manifold edges in orange after the position-based weld pass, so you can see exactly where the mesh is broken — before and after repair, not just a count in a table.

Yes — Mesh Doctor is free with a daily allowance and no sign-in. Analysis and repair run locally in your browser, so your models are never uploaded.