3DGEN is a set of parametric generators that run entirely in your browser. Upload an STL and get a printable two-part mold, silicone mold box or plaster casting mold — or start from text, an outline or a photo and make cookie and clay cutters, nameplates, keychains, stamps, texture rollers, lithophanes, suncatchers, pet bowls and more. Adjust a few sliders and export a print-ready STL or 3MF.

It's built for makers who don't want to learn CAD: candle and soap makers, resin and concrete casters, polymer clay artists and anyone with a 3D printer.

No signup is needed to try it, and your files never leave your device — everything is computed locally in the browser. The free plan covers personal use; Pro adds unlimited downloads, a commercial license and your own logo instead of the 3DGEN mark.