gumyr/build123d

Health v2 · maintenance only

Adoption not part of the score

2926 stars · 265 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

build123d is a Python-based parametric boundary representation (BREP) modeling framework for 2D and 3D CAD, built on the Open Cascade geometric kernel. It provides a clean, Pythonic interface for creating precise models suitable for 3D printing, CNC machining, and laser cutting.

Use cases

• create parametric 3d models in python
• generate cad models programmatically for 3d printing
• design parts for cnc machining with code
• script 2d and 3d geometry for laser cutting
• build precise brep solid models without a gui cad tool
• automate repetitive mechanical part design

When to choose

• you want cad-as-code with a fully Pythonic API
• you need precise BREP solids rather than mesh modeling
• you are migrating from CadQuery and want a more expressive algebraic API
• you need models exportable for 3d printing or manufacturing

When to avoid

• you need a graphical interactive CAD environment
• you only need simple mesh editing or STL cleanup
• you work outside Python or need a browser-based CAD tool

Facets

library · maturity active

graphics simulation sdk graphics developer-tools cross-platform python cross-platform cad brep 3d-modeling opencascade 3d-printing parametric-modeling cadquery

Member repositories

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