build123d
build123d developers (gumyr)
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pypi.org
A Python library for parametric BREP CAD on the Open Cascade kernel, in which you define parts in code rather than by interactive drawing: sketches, extrusions, revolves, chamfers and fillets, with convenient selectors for faces and edges. Output is exported to STEP and STL and fits into other CAD programs. It was originally derived from CadQuery and restructured into an independent framework. It suits part families driven by parameters and automation; it requires being comfortable with programming.
Ratings & Reviews
| Licence type | Completely Free, Open Source |
|---|---|
| Licence terms | Open-source licence (Apache-2.0). Free for any purpose including commercial work, with no time limit, no registration and no licence key. |
| Platforms | Linux, macOS, Windows |
| Engineering field | Mechanical Engineering |
| Tool type | CAD & Drafting |
| Vendor site | github.com |
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Last verified: 2026-10-05
