Split3MF

Guide

How to Split a 3MF into Parts for 3D Printing

Splitting a 3MF into parts is useful when one object is too large for the printer, needs a manageable seam, or will be assembled from several colors. This guide follows the current Split3MF workflow.

FAQ

A five-step workflow

  1. 1

    Open the 3MF and confirm the model orientation and scale.

  2. 2

    Choose Plane cut for a flat seam or Sketch cut for a custom outline.

  3. 3

    Use Fit to Printer when the whole model exceeds your build volume.

  4. 4

    Check the new pieces, add connectors or labels where needed, and export.

  5. 5

    Slice each part and test the fit before printing the complete model.

Choose a seam before you cut

Place a seam on a broad, accessible surface when possible. Avoid thin walls, moving joints, and highly visible curved details unless the design requires them. A short planning step can save a failed print and a difficult glue-up.

Use plane cut for a simple split

Select the piece, open Plane cut, and move or tilt the plane. The preview shows the cut before you commit it. If the result creates a fragile sliver, undo and move the plane.

Use Fit to Printer for oversized models

Select a printer preset or enter a custom volume. Fit to Printer plans cuts and displays the expected pieces before applying them. Leave room for your slicer’s brim, skirt, supports, and safety margin.

Assembly and export checks

Add connectors only after the main geometry is divided. Print the clearance test when using dowels or pegs. Export plain 3MF or STL parts, open them in your slicer, and verify orientation, scale, and part count.

Try Split3MF in your browser

Open a real model, preview the operation, and decide what to export.

Try a sample model