Free browser tools · Your files stay on your device
STL Mesh Cleanup
Remove degenerate triangles, weld matching vertices and recalculate normals locally.
Open the local workspace
Choose your model, or try a built-in example. Your files stay on your device and processing uses no AI credits.
STL · No sign-up required
How to use this tool
Step 1
Open a local model or try the example
Step 2
Adjust the preview and inspect the model
Step 3
Use the task controls and download your result
Supported workflow and limitations
This is limited cleanup. Open boundaries and non-manifold edges are reported, not silently declared repaired.
Frequently asked questions
Are files uploaded to Magic3D?
Files selected on this page are parsed and processed in your browser. Platform previews are read from their existing preview address. No AI generation is triggered by opening a model.
Does this use credits or require an account?
Local viewing, conversion and estimates use no Magic3D AI credits and need no account. AI model generation remains a separate service.
Which files should I select?
This task accepts STL. When a file references separate BIN buffers, MTL materials or texture images, select all of them together. Total selected size is limited to 100 MB.
What are the limitations?
This is limited cleanup. Open boundaries and non-manifold edges are reported, not silently declared repaired.