Free CAD
Open-source parametric 3D CAD modeler.
Open the official app on www.freecad.org
This tool is hosted by its maintainers. Click below to open www.freecad.org in a new tab — it's their official demo.
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Use it free
Open the official tool or demo — no account needed.
Self-host it
Run the open-source version on your own infrastructure.
What is Free CAD?
FreeCAD is an open-source 3D parametric modeler designed for creating precise, customizable digital models. Its primary purpose is to serve as a collaborative platform for engineers, architects, and designers to develop complex geometries with parametric constraints, enabling modifications to designs through adjustable parameters. The tool addresses the need for a flexible, cost-effective CAD solution that supports both professional and educational applications. FreeCAD operates under the LGPL-2.1 license, allowing users to freely use, modify, and distribute the software while ensuring the source code remains open. It is particularly valuable for small businesses, hobbyists, and academic institutions seeking alternatives to proprietary CAD tools without compromising on functionality. By fostering a community-driven development model, FreeCAD balances technical rigor with accessibility, making it a viable option for projects requiring detailed engineering simulations or architectural planning.
How it works
FreeCAD is a multi-platform 3D modeling application that combines parametric design capabilities with a modular architecture. It enables users to construct complex models by defining relationships between geometric entities, allowing for iterative design changes without rebuilding entire structures. This approach is critical for applications requiring precision, such as mechanical engineering or architectural modeling. The software's open-source nature and LGPL-2.1 licensing model make it accessible to individuals and organizations seeking to avoid proprietary software costs. Its community-driven development ensures continuous improvements while maintaining compatibility with industry standards like IGES and STEP for file interoperability. FreeCAD supports parametric modeling, direct modeling, and 3D printing workflows. Its workbench system allows users to switch between specialized tools, such as the Part Design module for creating assemblies or the Draft Workbench for 2D sketch-based modeling. The software also includes simulation tools for finite element analysis and scripting support via Python for automation.
How to use it
- 1Download and install FreeCAD from its official website or package repositories. 2. Launch the application and select a workbench, such as 'Part Design' for 3D modeling. 3. Use the 'Create' menu to generate basic shapes like cubes or cylinders, then apply constraints via the 'Constraints' toolbar. 4. Save the project in formats like.FCStd or export to STL for 3D printing. Practical tips: Familiarize yourself with the 'Document Object Properties' panel for managing parameters. Use the 'Mesh' workbench for converting complex geometries into 3D printable models. Consult the official documentation for advanced scripting techniques.
What it can do
- parametric cad
Use cases
Assumptions and limitations
Assumptions
- source: https://www.freecad.org/
- license: LGPL-2.1 — free to use
- privacy: Self-hosted — you control your data
Limitations
- Steep learning curve for users unfamiliar with parametric modeling concepts
- Limited real-time collaboration features compared to cloud-based CAD tools
- Fewer built-in tools for rapid 3D sketching compared to commercial alternatives
- Dependence on community contributions may result in slower feature development
- Performance degradation with highly complex assemblies due to open-source constraints
Understanding the result
Open-source parametric 3D CAD modeler.
Tool details
- Clearly flagged when a network request is needed.
- No account, no sign-up, and no tracking of your content.
- Powered by (MIT).
- Built with
- (https://www.freecad.org/)
- License
- MIT
- Runs locally
- No — requires a network request
- Verification
- Not yet verified
- Input
- Query
- Output
- Text
Built with https://www.freecad.org/. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.
- Built with
- License
- MIT
Open-source project
OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.
References
- / — GitHub Repository
Upstream project · GitHub
- LGPL-2.1 License
Upstream project
Frequently asked
What is FreeCAD used for?
FreeCAD is primarily used for 3D parametric modeling in engineering, architecture, and product design. It enables users to create precise digital models with adjustable parameters, making it suitable for tasks like mechanical part design, architectural planning, and 3D printing. Its open-source nature makes it accessible for educational and professional applications where proprietary CAD software might be cost-prohibitive.
How does FreeCAD's parametric modeling work?
FreeCAD's parametric modeling allows users to define relationships between geometric elements through constraints. For example, when creating a bracket, dimensions can be linked to variables, enabling automatic updates if measurements change. This contrasts with direct modeling tools, which rely on fixed geometry. The parametric approach ensures design consistency and facilitates iterative modifications without manual rework.
How do I create a simple 3D model in FreeCAD?
To create a basic model, start by selecting the 'Part Design' workbench. Use the 'Create' menu to generate a base shape, such as a cube. Then, add constraints via the 'Constraints' toolbar to define dimensions. For example, set a length of 100mm for a rectangular prism. Save the file as an .FCStd, and export to STL for 3D printing using the 'File > Export' option.
How does FreeCAD compare to Fusion 360 or Blender?
FreeCAD focuses on parametric 3D modeling with a strong emphasis on engineering precision, while Fusion 360 offers integrated CAD/CAE/CAM tools for product development. Blender excels in artistic 3D modeling and animation but lacks FreeCAD's parametric constraints. FreeCAD's open-source license provides flexibility for customization, whereas Fusion 360 requires a subscription. Both tools cater to different workflows, with FreeCAD better suited for technical design tasks.
What should I do if FreeCAD crashes during a project?
If FreeCAD crashes, first check for updates to ensure you're using the latest stable version. Save your work frequently to minimize data loss. If the issue persists, try restarting the application or reinstalling it. For complex models, simplify geometry or split assemblies into smaller files. Consult the FreeCAD forums for troubleshooting specific errors related to your operating system or hardware.