Free Online CAD, No Download

Why browser-based CAD

Traditional CAD means a heavy desktop install, a license key, and weeks of learning the interface. Browser-based CAD removes all three. PartWork.ai is 100% cloud-based: no software to install, no plugins, nothing saved locally. Open a tab and start designing — your work saves to the cloud in real time.

Describe the part instead of drafting it

The other barrier to CAD is the learning curve. PartWork.ai is AI-powered, so you can describe what you want in plain English and get editable 3D geometry back:

Create a 50 mm cube with a 10 mm hole through the center
Add a 3 mm fillet to all edges

Prefer familiar tools? Sketch, extrude, fillet, and chamfer are all there too — see the Quick Start Guide. Either way, the AI handles the geometry.

Some parts have a ready-made starting point: the free gear generator draws real involute gears from a tooth count and module. And if you already have a file, you can open it without any install — STEP, STL, or legacy IGES files render right in the browser.

Works on any device

Because it runs in the browser, it works on desktop, tablet, and phone — no "lite" version. Start a design on your laptop and pick it up on your phone right where you left off. When you are done, export STL for 3D printing or STEP for CNC.

Try it free, right now