WARNING: FreeCAD has moved!

FreeCAD code and release files are now hosted on github at https://github.com/FreeCAD/FreeCAD

Only older files and code are available here.

FreeCAD is a general purpose feature-based, parametric 3D modeler for CAD, MCAD, CAx, CAE and PLM, aimed directly at mechanical engineering and product design but also fits a wider range of uses in engineering, such as architecture or other engineering specialties. It is 100% Open Source and extremely modular, allowing for very advanced extension and customization.

FreeCAD is based on OpenCasCade, a powerful geometry kernel, features an Open Inventor-compliant 3D scene representation model provided by the Coin 3D library, and a broad Python API. The interface is built with Qt. FreeCAD runs exactly the same way on Windows, Mac OSX and Linux platforms.


  • Rock-solid OpenCasCade-based geometry kernel, allowing complex 3D operations on complex shape types, and supports natively concepts like brep, nurbs, booleans operations or fillets
  • Full parametric model allowing any type of parameter-driven custom objects, that can even be fully programmed in python
  • Complete access from python built-in interpreter, macros or external scripts to almost any part of FreeCAD, being geometry creation and transformation, the 2D or 3D representation of that geometry (scenegraph) or even the FreeCAD interface

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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5

User Reviews

  • Cool program - but the interface is terrible. It requires a tutorial just to find basic tools - and the measurement tool does not show unit type, so when I imported a file and finally found the measurement tool is just told me it was 664 long.

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Additional Project Details


Croatian, French, Dutch, Italian, English, Portuguese, Swedish, Chinese (Simplified), German, Japanese, Spanish, Russian

Intended Audience

Advanced End Users, Developers, End Users/Desktop

User Interface

X Window System (X11), Win32 (MS Windows), Qt

Programming Language

Python, C++