A real parametric kernel, in the browser
Sketch, constrain, and feature your way to released geometry — with the robustness of desktop CAD and none of the installs.
Real B-rep kernel
Solid modeling on OpenCASCADE — exact geometry, not meshes. Booleans, fillets, shells, and lofts behave like the CAD you already trust.
History-based features
An ordered feature tree. Change a sketch dimension or an extrude depth and the whole model regenerates, deterministically.
Robust references
Topological naming keeps a fillet on the right edge even after upstream edits — the hard part of parametric CAD, done right.
Assemblies & mates
Insert instances, add mate connectors and degrees of freedom, drag to articulate, and check interference before manufacturing.
Sketch constraint solver
Coincident, parallel, perpendicular, tangent, equal, and dimensional constraints with clear under/over-defined feedback.
Optimistic preview
Light edits preview instantly in your browser while the server kernel produces the authoritative result.