Model conversion guides

Choose the right output, understand what survives conversion, and check the result before using it in a design or print.

• STL to STEP: what changes, what doesn't

  Work through a 10 mm cube example, set the correct source units, and understand why a STEP export still has triangular faces.

• STEP to STL: choosing mesh quality

  Pick a tessellation tolerance, preserve model dimensions, and check a converted part in your slicer.

• Fix conversion errors and unexpected results

  Diagnose open shells, incorrect scale, missing textures, unsupported geometry, and browser resource limits.

A small model to test your workflow

Our sample cube has 12 triangles and coordinates from 0 to 10 on each axis. Choose millimeters when converting the STL and the resulting model should measure 10 × 10 × 10 mm. It is deliberately simple so that you can check units and basic import behavior without sharing your own design.

Download the 10 mm cube STL
Download the matching STEP cube

These original sample models are provided for unrestricted use, modification, and redistribution. They are calibration examples, not a certification of a printer's accuracy.

Open the converter or report an issue with a guide or result.