Open your .step or .stp files.
Choose how smooth curved surfaces should be.
Press Convert, check the model, and save the STL.
No. The STEP file is read by OpenCascade running in your browser, so your design never leaves your device. That matters for work you haven't shared yet.
Normal suits most printing. Choose Smoother for large or polished parts, or Fewer triangles for a smaller file.
No. Everything happens inside your browser, on your own device. The site's security settings stop the page from sending your files anywhere.
Yes. No sign-up, no daily limit and no watermark.
Yes, in Safari, Chrome and other modern browsers. You can open files from the Files app or your downloads, and save the results back.
Customer lists, contacts, bank exports and the routes you run from home stay on your phone or computer from start to finish.
How it stays private100 converters for the files people use every day.