Upload an STL file, inspect holes, non-manifold edges, degenerate faces, and normal issues, then export a conservative repair report built for real 3D printing workflows.
Before / After evidence
These sample previews show the same product stance used in the checker: safe fixes are separated from report-only geometry, and every repair action stays visible in the log.
All visuals in this section are marked as illustrative sample previews. They do not represent uploaded user files or a guaranteed print-ready repair.
Duplicate + degenerate faces
Remove duplicate faces, remove zero-area triangles
Safe repair removes low-risk face noise before export.
Generated preview asset, not a real user file.
Normal direction mismatch
Recalculate facet normals from triangle winding
The preview explains what changed before paid export.
Generated preview asset, not a real user file.
Open boundary loops
Report hole-filling boundary instead of auto-filling
Risky hole filling stays visible instead of being over-promised.
Generated preview asset, not a real user file.
Non-manifold shared edges
Clean safe noise, keep complex topology report-only
Paid artifacts keep the repair log and JSON report boundary.
Generated preview asset, not a real user file.
Upload locally, inspect issues, preview safe repair, then decide whether a private export is worth saving.
Built for bad STL files
The V1 scope stays narrow: explain what is wrong, apply safe fixes where possible, and make unsupported geometry obvious.
Detect holes, non-manifold edges, duplicate faces, degenerate triangles, and normal consistency issues before a print fails.
Apply low-risk fixes first and clearly mark complex geometry that needs manual review instead of pretending every STL is repairable.
Show issue counts, severity, print-ready score, repair log, and before/after deltas that a maker or print shop can understand.
Keep original STL files, repaired outputs, and reports separated with owner checks, deletion controls, and clear retention rules.
Workflow
Free users can check small files quickly. Logged-in and paid flows add private storage, repaired STL downloads, and structured reports with server-side authorization.
No. V1 focuses on common mesh issues and clearly reports complex geometry such as self-intersections or thin walls instead of over-promising a guaranteed print-ready result.
Small STL checks are designed to work without an account. Saving history, larger files, repaired STL downloads, and report exports can require login or a paid plan.
The product plan separates original files, repaired files, and reports, then protects downloads with owner checks and deletion status before any production launch.
STL Repair
Start with a small STL file and get a mesh health report. Safe repair and paid exports stay gated behind verified results.