A free, browser-based alternative to Tinkercad for building printable models from simple shapes. Its standout feature is an AI connection that lets Claude (Anthropic's AI assistant) build or edit models from a plain-language description, though you can model entirely by hand.
Layerling is built off of the open-source, browser-based modeling app SketchForge.
vega3d.com
Collection of online 3D tools in one place: an AI 3D model generator, 3D text and vase generators, a mold maker, a model viewer and an online slicer.
3dslash.net
Block-based 3D modeling that feels like Minecraft with tools: start from a cube and chisel, add and paint blocks to make a model. Very approachable for kids and beginners, with a free plan and paid plans for more featur…
formware.co
Free online tool that automatically repairs broken STL files (holes, flipped normals, non-manifold edges) so they slice cleanly. Upload, repair, download; nothing to install. It comes from Formware, a developer of slici…
