Parametric CAD Software, With an AI Copilot Built In

Draftr is parametric CAD software for macOS and Windows. Every part is a non-destructive draft stack — an editable sequence of modeling operations on top of the OpenCascade geometry kernel, the same class of engine behind the professional CAD workflows you already know. Change an earlier step and everything downstream rebuilds, preserving your design intent.

Real Parametric Modeling

• Editable history. Pads, pockets, fillets, chamfers, patterns, and sketches are all versioned steps you can revisit and reorder.
• Face-aware viewport. Stable face and edge ids mean selections, measurements, and actions all target the same semantic geometry across edits.
• Sketch-driven features. Draw profiles on faces or datum planes and extrude, cut, or revolve.
• Assemblies. Position parts on a shared plane, mate faces across instances, measure across components, and export a merged model.
• STEP / STL / GLB export. Interchange with other CAD, print, or visualize.

The AI Copilot Is Optional — and Powerful

Direct tools run deterministically on your machine, so you stay in full control. When you want it, an AI copilot layers on top: Full Generate builds a part from a description, and Quick Edit makes changes to your current selection from a plain-language instruction. Because the AI produces draft-stack steps like any other tool, its work is just as editable as yours.

Who It's For

• Makers and engineers who want feature-based modeling without a steep licence.
• 3D-printing users who need dimensionally accurate, printable solids.
• Anyone who wants parametric history and STEP interchange on macOS or Windows.
• CAD users curious about an AI copilot that outputs editable geometry, not meshes.

Runs Locally, Works Offline

The geometry runtime ships inside the app, so modeling happens on your machine — no cloud round-trip to pad a face or cut a pocket. Draftr is free to download with a free tier to get started.

One Tool, From Idea to Printable Solid

Draftr is a native desktop app for macOS and Windows. The geometry runtime ships inside the app, so it works offline right after install — no cloud round-trip to model a part. Every AI generation and edit lands as a versioned step in a non-destructive draft stack, so you can go back, change an earlier operation, and rebuild everything downstream without losing your parametric intent.

Explore the rest of Draftr: AI CAD generator, text to CAD, STL to CAD, AI 3D model generator, image to CAD, parametric CAD software, and free CAD software.

Download Draftr for macOS or Windows →  ·  Read the documentation →