FuCad is a fork of FreeCAD, the open-source parametric
3D modeler. It keeps FreeCAD's geometry kernel, document model, Python API and
.FCStd file format intact, and reworks the user experience along the lines of
Fusion 360: a unified, task-driven interface instead of a workbench-per-discipline
layout.
Because the core is unchanged, FuCad opens existing FreeCAD documents and runs existing FreeCAD macros and addons.
Upstream project • Upstream documentation • Upstream repository
FuCad is an early-stage fork under active development. There are no precompiled releases yet; build from source.
FuCad uses FreeCAD's build system unchanged. See the Developers Handbook – Getting Started for platform-specific build instructions and dependencies.
- OpenCASCADE — the geometry kernel
- Coin3D — Open Inventor-compliant 3D scene representation
- Python — broad scripting API, compatible with FreeCAD's
- Qt — graphical user interface
Report problems with FuCad on the FuCad issue tracker.
If you can reproduce the same problem in upstream FreeCAD, please report it to the FreeCAD issue tracker instead, so the fix benefits both projects.
FuCad's scripting API and core concepts are FreeCAD's, so the FreeCAD documentation applies:
Please do not report FuCad-specific problems to the FreeCAD forum or issue tracker; FuCad is not affiliated with or endorsed by the FreeCAD project or the FreeCAD Project Association.
FuCad is a derivative work of FreeCAD, Copyright (C) 2001-2026 FreeCAD contributors.
FuCad is free and open-source software licensed under the GNU Lesser General Public License, version 2.1 or (at your option) any later version (LGPL-2.1-or-later), the same terms as upstream FreeCAD. See LICENSE for the full text and src/Doc/LICENSE.html for details on the licenses of bundled third-party components.
The names "FreeCAD" and the FreeCAD logo belong to the FreeCAD project and are used here only to identify the upstream work from which FuCad is derived.