EdgeMagic

Chamfer & fillet on mesh edges — runs in your browser

Model

Drop a file or click to upload STL · OBJ · 3MF · STEP

No file loaded

Edges

Click edges in the viewport. Hold Shift to add to the selection.

Feature angle (°) 35°

0 edges selected

Operation

Chamfer size 25% Fillet radius 40% Smoothing passes (fillet) 5

Export

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Hosted on GitHub

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Quick start

Upload an STL, OBJ, 3MF, or STEP file.
Adjust Feature angle if needed, then click Rebuild edges.
Click edges in the 3D view (hold Shift for multiple).
Choose Chamfer or Fillet, tune sliders, then Apply to selection.
Download as STL or 3MF.

STEP import loads a one-time Open Cascade module (~few MB). Processing is mesh-based after import.

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Help

Supported formats

STL / OBJ / 3MF — loaded directly in the browser.
STEP (.step, .stp) — tessellated using Open Cascade (occt-import-js). First use downloads WASM.

Edges & selection

Edges are detected where the angle between two faces exceeds the feature angle. Click an edge segment to select it; Shift+click toggles additional edges. Boundary edges of open meshes are included.

Chamfer & fillet

Chamfer applies a flat bevel-like cut on selected edges (mesh approximation).

Fillet creates a rounded edge by smoothing after a small inward bevel.

Export

STL is binary. 3MF is a minimal Core spec package (single mesh) suitable for slicers and viewers.

Privacy

All processing happens in your browser. Files are not uploaded to a server.