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cycleCAD

Free#50 of 80 in 3D CAD Software

cycleCAD: An open-source browser CAD tool with a broad modeling toolkit and a JSON-RPC API. Ranked #50 of 80 in 3D CAD Software by our editors (4.5/10); pricing: Free plan; best for developers building parametric CAD through a web API.

4.5/10Editor score

Visit cycleCAD

cycleCAD4.5 Visit cycleCAD

At a glance

Editor score
4.5 / 10
Pricing
Free plan
Best for
Developers building parametric CAD through a web API
Free plan
Yes
Paid from
Free
Assembly design
Yes
Facts checked
19 Sep 2026

Where it wins
- 13 sketch tools and 12 constraint types support parametric design.
- Assembly tools include seven joint types, mate constraints, and motion study.
- A 55-command JSON-RPC API supports automation; export formats include STEP, IGES, and GLB.
Where it doesn't
- No cloud collaboration is listed among its capabilities.
- Exports are limited to STEP, IGES, and GLB.
- Its API-oriented browser workflow may not suit conventional desktop CAD work.

Our verdict on cycleCAD

cycleCAD is browser-based, open-source parametric 3D CAD software for designers, makers, and CNC shops. It runs without installation or an account, and its scope extends from sketching and solid modeling to assemblies and AI-assisted geometry generation. Developers building parametric CAD through a web API are the clearest fit; teams that depend on desktop-centered workflows or cloud collaboration should look elsewhere.

The modeling toolkit is broad for a browser product. Sketches have 13 tools and 12 constraint types, while B-rep solid modeling uses OpenCascade.js. Operations include extrude, revolve, sweep, loft, fillet, chamfer, shell, pattern, hole, thread, mirror, draft, scale, combine, split, and boolean operations. For assemblies, cycleCAD provides seven joint types and mate constraints, plus interference checking, contact sets, motion study, explode, and collapse tools. The AI Copilot generates geometry from natural-language prompts. This breadth makes the product more than a sketch-to-solid tool, though conventional desktop users may find its browser and API orientation a poor fit.

Automation is a defining strength: the 55-command JSON-RPC Agent API gives developers a route to work with CAD operations programmatically. Models can be converted and exported as STEP, IGES, and GLB; Inventor IAM and IPJ are listed for import. That format set is useful for exchange, but users who need other export formats should consider alternatives. The product is distributed under the MIT license, which may suit teams seeking open-source software. Choose cycleCAD for browser-based parametric modeling and API-driven workflows; avoid it if cloud collaboration or a more conventional desktop CAD workflow is central to the requirement.

Your product? Our editors can test cycleCAD in depth and publish a review, labelled as paid · from $149/mo →

cycleCAD pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on cyclecad.com

cycleCAD fact sheet

Free plan	Yes
Paid from	Free
Modeling method	Parametric
Assembly design	Yes
Sheet-metal tools	Not verified
Surface modeling	Not verified
Cloud collaboration	No
Supported platforms	web, API
File import and export	STEP, IGES, GLB; Inventor IAM and IPJ import
Deployment	Cloud
Platforms	Web
Pricing	Free plan
Website	cyclecad.com
Facts checked	19 Sep 2026

Alternatives to cycleCAD

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Featured on iTechGuides

cycleCAD is listed in our 3D CAD Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

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Last updated 28 Sep 2026 · How we research and update