Remove Degenerate Faces from STL
Paramesh AI's free mesh cleaner removes degenerate faces automatically. Upload your STL at parameshai.com/clean — faces with area below a threshold are stripped, duplicate vertices are merged, and the mesh is re-validated. The stats bar shows exactly how many faces were removed.
What are degenerate faces?
Degenerate faces are triangles with zero or near-zero area. They happen when two or more vertices of a triangle collapse to the same point, creating a "sliver" triangle. These cause problems in simulation, 3D printing, and CAD import.
Common causes
- Mesh simplification algorithms that collapse edges too aggressively
- Boolean operations that create slivers at intersection edges
- Floating-point precision errors in CAD-to-mesh conversion
- Mesh healing tools that create tiny faces to fill gaps
How the cleaner handles them
The pipeline filters out faces with area below min_face_area (default 1e-10 mm). After removal, vertices are re-merged and the mesh is checked for watertightness. The before/after stats show the exact face count change.