STEP ↔ STL converter

Drop a STEP file to see it and download an STL at the accuracy you choose, or drop an STL to rebuild it as a STEP solid. Everything runs in this browser: the file is never uploaded.

Drop a .step, .stp or .stl file here

Read and converted on this device by OpenCascade compiled to WebAssembly. Nothing is uploaded, nothing is stored, no sign-up.