FREE BROWSER-BASED STL FIXER

Model in.
Fixed STL out.

Give a broken model a fresh start. Drop in your STL, fix common mesh issues and download a repaired copy.

Local processing — your files stay on this device

1. Add your model

One STL. A quick check. No uploads.

0 models

Binary or ASCII STL, up to 100 MB.
Your original file stays untouched.

One click. We handle the cleanup.

FileSTL → STL

ProcessingOn this device

StatusAdd a model

Close small holes, clean up damaged faces and correct inward-facing normals. Openings that look intentional are kept.

Fill enclosed cavitiesRemove sealed air pockets inside the model. Seal open holesCap mesh gaps and open rims, including designed openings.

Turn these on only when you want those spaces filled. Through-holes and recesses in a closed surface are kept.

Works in modern browsers. Large or complex models can take longer. Check the repaired copy in your slicer before printing.

THREE STEPS. NO UPLOAD.

Drop a model or choose a file. We check the mesh for common problems.

Run the repair and see what changed. Any remaining issues are shown clearly.

Save the fixed STL, open it in your slicer and carry on making.