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FreeCAD is open-source parametric 3D modelling software built to design real-world objects of any size.

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A parametric mechanical clevis bracket with its feature tree and editable dimensions in FreeCAD
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Built for the way ideas evolve

Parametric

Change the design, not the whole model

Build with constraints, dimensions, and a modelling history. Update an earlier decision and let dependent geometry follow.

Interoperable

Keep control of your work

Work with STEP, IFC, STL, DXF, SVG, and many other formats. Your native project files stay editable and yours.

Extensible

Shape the tool around your workflow

Use dedicated workbenches, install community addons, automate tasks with Python, or create tools of your own.

One platform, many workflows

A full-scale flight simulator cockpit assembly designed in FreeCAD
Design

Parts and assemblies

Create precise solid models, reusable components, and assemblies that respond to design changes.

Cockpit model by Xpendable

An architectural model of a church created in FreeCAD
Architecture

BIM and the built environment

Model buildings and infrastructure with objects, properties, quantities, and open IFC workflows.

Church model by Stefano Moser

CAM toolpaths prepared around a machined part in FreeCAD
Manufacturing

From model to machine

Prepare technical drawings, 3D-printable files, toolpaths, and other production-ready outputs.

CAM example by cyborg_ar

Finite element analysis results displayed on a wheel model in FreeCAD
Analysis

Test before you build

Connect geometry to simulation and engineering workflows, including finite element analysis.

FEA visualization by NewJoker

Free to use. Open to improve.

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Ask questions, exchange ideas, and meet FreeCAD users and contributors around the world.

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