STL Repair Online

PRIVATE · BROWSER-LOCAL REPAIR

Repair an STL model

Inspect and correct common mesh issues in your browser. Your original file stays untouched; the repaired result is downloaded separately.

Drop an STL file here or choose one from your device STL · up to 150 MB · processed on this device

What this repair can—and cannot—fix

Safe, measurable cleanup

It welds near-identical vertices, removes degenerate and duplicate faces, checks connected components, consistently orients neighboring faces, and fills only small, simple, sufficiently planar boundary loops when triangulation is safe.

Honest limits

Ambiguous, branching, oversized, non-planar, or otherwise unsafe boundaries are left open and reported. This cannot resolve self-intersections or guarantee printability. Review the output in your slicer before printing.

Processing runs locally in a Web Worker. No file upload or external repair application is used. The original file is never overwritten.

Want to inspect the model first? Open STL Viewer. Need diagnostics without changing the file? Use STL Checker.