A free SelfCAD alternative: OwlCAD’s full browser editor costs nothing, with editable parametric history, edge fillets, solid STEP export and private cloud projects.
OwlCAD’s full modeling editor is free: parametric history, real fillets, exact dimensions, solid STEP, and private-by-default cloud projects. It exports print-ready files for your slicer (it doesn’t slice itself).
Free editor · Private by default · No install
OwlCAD focuses on modeling and print preparation rather than bundling a slicer, and the full editor is free to use.
Scrub back to any sketch, boolean, or dimension and the model rebuilds downstream, so you change a parameter without starting the shape over.
Round or bevel single edges with fillets that hold their radius, type exact lengths and angles, and measure the model itself: hole radius and diameter, true arc length, face area, and the smallest gap between two parts.
Export a true solid STEP (B-rep) for the parts you build, plus STL, 3MF, OBJ, GLB, SVG and DXF: handoff to mechanical CAD, not just meshes.
Projects are private the moment you make them, autosave to the cloud, and keep a version history you can roll back. Share only when you choose to.
Watertight checks, hollowing, auto-orient, and fit-to-printer, then print-ready STL or 3MF for your slicer, whether Cura, PrusaSlicer or Bambu Studio.
Modeling, import, and export cost nothing; only AI generation is part of Pro. SelfCAD is freemium across the board.
OwlCAD runs a hosted MCP server, so Claude Code, Claude Desktop or Cursor can build a part on your account — authoring a real parametric tree, running it through the CAD kernel, rendering it to check its own work, and handing back a print-ready file plus a project you can open and edit. Part of Pro, and it spends no AI credits.
Open it in your browser, keep your designs private, and export for any slicer.
Yes. OwlCAD is browser-based 3D modeling and its full editor is free, where SelfCAD is freemium. Only OwlCAD’s AI generation is paid; modeling, import, and export are free.
An editable parametric history you can scrub and retro-edit, real edge fillets and exact dimensions, solid STEP export, and projects that are private by default with cloud version history.
No. OwlCAD focuses on modeling and print-aware preparation (watertight checks, hollowing, auto-orient, fit-to-printer), then exports print-ready STL or 3MF for your slicer of choice, such as Cura, PrusaSlicer, or Bambu Studio.
Yes. Nothing to install, on any modern browser, and you can start without an account.