3MF Cutter Online: Cut a Model

Plane cut divides the selected solid with a flat face. It is a good fit for bases, display stands, large figurines, and models that need a clean glue or connector surface. The cut face is closed by the geometry worker so the exported part remains a solid candidate for slicing.

Sketch cut lets you draw a line or outline on a face of the selected piece and cut through it. Extend the sketch beyond the piece, avoid self-crossing lines, and check the preview before committing the cut. Open or overlapping meshes may need Repair & simplify first.

The cutter does not choose supports, infill, layer height, or material settings for your printer. It also cannot guarantee that a seam is strong or invisible. Treat the preview as geometry guidance and verify the final slice.

A 3MF cutter is for choosing the boundary yourself. It is a better fit than a color splitter when the model has no painted regions, when you need a flat glue surface, or when a seam should stay away from a visible feature. The 3MF cutter works with 3MF, STL, and OBJ geometry and lets you inspect the closed result before you move on to connectors or export.

For a painted multicolor model, use the 3MF cutter only when the colors do not describe the intended parts; otherwise use Split 3MF by color first. For an oversized model, use Fit to Printer when the cut locations need to follow a build volume. The 3MF cutter remains the deliberate, hands-on option for one seam or one custom outline.