Guide · STEP → STL

Convert STEP to STL, free and online.

The fastest way to convert a STEP file to STL is right in your browser — no upload, no account, no software install. Drop your .step or .stp file, get a binary STL ready for any slicer.

Open the STEP → STL converter →

Why convert STEP to STL?

STEP (ISO 10303) is the precise B-Rep CAD interchange format exported by SolidWorks, Fusion 360, Inventor, FreeCAD and Onshape. STL is the triangle-mesh format every slicer and 3D printer understands. To 3D-print a STEP, you must triangulate it into STL first.

Steps to convert STEP to STL

  1. Open the converter — it loads in your browser, nothing to install.
  2. Drag your .step or .stp file onto the dropzone.
  3. Download the generated binary STL — open it in Cura, PrusaSlicer, Bambu Studio, OrcaSlicer.

FAQ

Is it really free?

Yes. No sign-up, no paywall, unlimited conversions.

Are my files uploaded?

No. Conversion runs 100% client-side in JavaScript. Your CAD geometry never leaves your machine.