Drag, drop, done
Pull shapes onto the plate, resize them with handles, and turn them with the protractor.
- Holes and groups cut in one click
- Arrow keys nudge, D drops onto the plate
- Parts library: bolts, gears, springs, boxes
New Describe a part, AI models it
Design anything in 3D
Free CAD that's as easy as Tinkercad and as precise as Onshape. Shape it, sketch it, sculpt it, print it. In your browser or on your desktop.
Windows 10+ · x64 · Free · No account needed
Three tools in one
Simple when you start. Precise when you need it.
Drag shapes like Tinkercad, sketch with constraints like Onshape, and sculpt like Blender, all in one history you can change at any time.
Sketch with real constraints
Draw on any plane or face, add dimensions that take formulas, and see when it's fully defined.
- Extrude, cut, revolve, sweep, loft
- Fillets and chamfers with drag arrows
- Variables like
width / 2in every field
Sculpt and shade
Turn any part into a mesh, subdivide it, and shape it with brushes. Then make it look real.
- Inflate, smooth, flatten, grab
- 18 materials, from PLA to gold and glass
- Realistic view and image export
AI part generation
Describe it. Get a part you can edit.
The AI doesn't hand you a frozen mesh. It writes a parametric model with sizes you can change, and if its first try fails, it fixes its own mistake.
- →Claude, GPT, Gemini, and Llama, or a free local model with Ollama
- →Ask for changes: "make it 20% taller and add a slot"
- →Your key stays in your browser
Generate a part with AI
width = 70angle = 65°slot = 14
const base = cad.box(p.width, 60, 6);
const back = cad.turn(cad.box(p.width, 6, 80), 90 - p.angle, [1, 0, 0]);
const lip = cad.move(cad.box(p.width, 6, 14), 0, -27, 4);
// cut a slot for the charging cable
const slot = cad.move(cad.box(p.slot, 70, 20), 0, 0, -1);
return cad.subtract(cad.union(base, back, lip), slot);Everything you need
From first idea to finished print.
Feature history
Every step stays editable. Roll back, reorder, suppress.
Exact geometry
OpenCascade, the kernel behind FreeCAD, runs on your machine.
Measure
Click two points. Corners and edge middles snap.
3D-print check
Overhangs in red, build volume, filament and time estimate.
2D drawings
Front, top, side, and iso views with hidden lines, as PDF.
Scripting
Build parts in JavaScript with named parameters.
Works offline
Installable, and your projects are saved as you go.
Cloud and sharing
Sign in with Google or GitHub to sync and share by link.
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Make it yours
Seven themes. Two ways to work.
Dark like your code editor or bright like paper, and switch between Tinkercad-style handles and Pro-style arrows whenever you like.
Get OnlineCAD
Free. Use it in the browser right now, or install the desktop app.