Drop a .stp file (same as STEP, shorter extension) and pull out a printer-ready STL.
100% local · file never leaves your browser
.stp and .step are the same format — STEP just renamed for legacy Windows 3-letter extensions. Both are ISO 10303 parametric CAD.
We tessellate the B-Rep with the OpenCascade kernel (WASM, ~7 MB, cached after first load) at FDM-friendly tolerance, then write a clean STL. Assemblies are welded into a single mesh.
The file is parsed in WebAssembly + WebGL on your device. Nothing leaves.
No queue, no upload. Most files convert in well under a second.
Orbit, pan and zoom the result in real time before you commit.
Yes, identical format. Pick the converter that matches your file extension.
Yes — SolidWorks STP exports are fully supported, including assemblies and complex surfaces.
Try re-exporting as AP203 or AP214 from your CAD tool — those are the most widely supported flavors.