Cut only where you point.

Load an STL, click points around the spot you want to split, and only that cross-section gets cut. Keyed dowels are added so the printed parts line up and can't twist.

Starting the geometry engine…

Split & KeyContained cuts with keyed dowels for 3D prints

1Model

No model loaded. Drop an STL onto the view, or open one.

2Place cut planes

Click three or more points on the surface around where you want the cut. More points give a best-fit plane. To reach a spot behind a wall, drag Section view at the top of the 3D view to cut away the front. Suggest crease cuts previews planes that follow a sharp edge; nothing is cut until you use one.

0 points

3Sections to cut

The plane passes through the model in these places. Only the ones you check get cut. Check more than one when a single cut would leave the parts joined elsewhere, or add another plane when the joining part runs a different way.

4Dowels

Diameter (mm) Depth each side (mm) Clearance (mm) Min wall (mm)

5Split and export

Units are read as millimetres. Everything runs in your browser; models never leave this page.