Cut an STL with a plane

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Trim a model with a plane cut. Adjust its position, angle and the side to keep in the preview.

Rendered example views: 1 shows the original model and 2 the calculated result. The images illustrate the model geometry, not the editor interface.

A simple example

You want to remove an overhanging section from a plate.

Step by step

1. Choose Plane Cut in the editor.
2. Select the cutting plane and move it with the handles or numeric fields. Rotate the plane for an angled cut.
3. Choose which side to keep. Positive and negative refer to the plane direction, not screen left and right.
4. Wait for the calculated preview, inspect the cut surface and apply.

What to check

The plane must intersect the model. This workflow keeps one side; it does not automatically deliver two separate STL files.

Preview and save

A preview is not a saved change. Wait for the checked result and choose Apply. If the button is disabled, read the message and check the selection or inputs. The offered STL download is paid; you will see the current price before purchase.