FreeCAD is an open-source parametric 3D CAD modeler for designing mechanical parts, products, buildings, technical drawings, printable models, CNC-ready geometry, and engineering projects with editable construction history.
FreeCAD is a parametric 3D CAD modeler for creating precise mechanical parts, assemblies, product designs, architectural elements, technical drawings, and models intended for manufacturing. Its feature-based workflow stores design operations and dimensional relationships, allowing users to revise earlier parameters and propagate changes through dependent geometry. Engineers, makers, designers, students, and architects can move from constrained sketches to solid models while maintaining real-world units and measurable dimensions. The application also supports specialized workbenches for tasks beyond basic modeling. Because FreeCAD is open source, users can access its code, customize workflows, install extensions, and use the software without purchasing a commercial CAD subscription.
The modeling environment combines the Open CASCADE geometry kernel with modular workbenches for Part Design, Sketcher, BIM, CAM, FEM, TechDraw, and other engineering activities. Models can be exchanged through formats including STEP, IGES, STL, OBJ, DXF, SVG, IFC, and additional supported standards, although imported data may require repair or workflow-specific adjustments. Python scripting exposes extensive application functionality for automation, macros, custom commands, and specialized workbenches. Engineering teams that discuss design changes remotely may use Discord alongside CAD workflows for project conversations, screenshots, and coordination. FreeCAD 1.1.3 is a maintenance release that includes important security and file-handling fixes, making current builds preferable when opening externally supplied project files.
The main benefit of FreeCAD is giving designers a precise, editable engineering workflow without requiring a paid proprietary CAD license. Parametric modeling lets dimensions, constraints, sketches, and dependent features remain connected, so design changes can be made earlier in the model history instead of rebuilding geometry manually. FreeCAD also brings several engineering disciplines into one extensible environment, allowing users to progress from solid modeling to drawings, BIM work, manufacturing preparation, or finite element analysis when appropriate workbenches are used. Broad import and export support helps projects move between CAD, 3D printing, CNC, architectural, and visualization workflows. Python scripting and macros can automate repetitive operations, while community-developed extensions add specialized capabilities without modifying the core application. Real-world units and full-precision geometry make the software suitable for measurable physical designs, and its availability across major desktop platforms helps teams maintain a similar modeling environment on different operating systems.
FreeCAD records modeling features and their relationships so dimensions or earlier construction steps can be changed without recreating an entire part. This parametric approach is useful for mechanical components, product iterations, and configurable designs where measurements evolve. Solid geometry is handled through the Open CASCADE Technology kernel for precision-oriented CAD operations.
The Sketcher workbench creates two-dimensional profiles controlled by geometric and dimensional constraints. Users can define lengths, angles, radii, alignment, tangency, symmetry, and relationships between sketch elements before turning profiles into three-dimensional features. Constrained sketches help preserve design intent because later dimensional changes can update geometry while maintaining specified relationships.
TechDraw converts three-dimensional models into dimensioned two-dimensional drawing views suitable for engineering documentation. Users can create projected views, sections, annotations, dimensions, and drawing pages from model geometry. This provides a direct route from an editable CAD model to manufacturing or reference drawings without manually redrawing the same component in separate illustration software.
FreeCAD includes BIM-oriented tools for building and construction projects, with support for architectural objects and workflows based on open standards. Designers can work with elements such as walls, structures, spaces, and related building information while integrating three-dimensional geometry. IFC support helps exchange building data with other compatible BIM applications and project environments.
CAM tools can prepare machining operations from modeled geometry for manufacturing workflows that use CNC equipment. Users can define jobs, tools, machining strategies, and paths before producing suitable machine instructions. Keeping manufacturing preparation connected to the CAD model helps reduce duplicated geometry work when a component changes during design refinement or production planning.
The FEM workbench provides an environment for preparing finite element analysis workflows around CAD geometry. Users can create analysis objects, apply supported constraints and loads, generate meshes, and work with compatible solvers. This capability helps engineers investigate structural or physical behavior without immediately moving every model into a separate analysis application.
FreeCAD exposes extensive functionality through Python, allowing users to automate modeling operations, create macros, develop custom commands, and build complete workbenches. The integrated scripting approach is valuable for repetitive engineering tasks, procedural model creation, company-specific tools, and workflows that would be inefficient to perform manually through the graphical interface each time.
Model and project data can be imported or exported through numerous engineering and graphics formats, including STEP, IGES, STL, OBJ, DXF, SVG, IFC, and others. This flexibility helps FreeCAD participate in workflows involving 3D printing, CNC machining, architecture, visualization, and other CAD systems while reducing dependence on one proprietary exchange format.
Yes. FreeCAD is open-source software distributed under the LGPL-2.0-or-later license. It can be used without purchasing a commercial CAD subscription, and its source code is available for inspection and modification under the license terms.
Yes. Models can be designed with real-world dimensions and exported to formats used in 3D-printing workflows, including STL. Users should still check model geometry, scale, tolerances, and slicing settings before manufacturing a physical part.
Yes. STEP is among the supported CAD exchange formats and is commonly used for transferring precise solid geometry between engineering applications. Imported models can then be inspected or incorporated into supported modeling workflows.
Yes. The TechDraw workbench can generate two-dimensional drawing views from three-dimensional models and supports dimensions, annotations, projected views, sections, and drawing pages for engineering documentation.
FreeCAD 1.1.3 is the current stable release. It was released on July 25, 2026 as a maintenance update in the 1.1 series and includes security, file-handling, and additional bug fixes.
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