CAD Software Download: Free and Open-Source Options

2D CAD focuses on technical drawings, plans and schematics, where accuracy and standard line types matter. 3D CAD builds solid or surface models you can rotate, measure and export for manufacturing or 3D printing. Many workflows use both: a 2D drawing derived from a 3D model.

• 2D CAD: floor plans, electrical diagrams, mechanical drawings.
• 3D parametric CAD: editable models driven by dimensions and constraints.
• 3D direct modelling: push-pull geometry without a feature history.

FreeCAD is the standout free parametric 3D modeller and keeps improving with each release. LibreCAD and QCAD handle 2D drafting well, and both read and write the common DXF format. For beginners and hobbyists these free tools cover an enormous amount of ground without any subscription cost.

Industry standards like AutoCAD, Fusion 360 and SolidWorks offer advanced simulation, collaboration and manufacturing features. Several provide free trials, and Fusion has a free tier for personal, non-commercial use. If you work in a regulated industry or a team, a commercial package may be required for compatibility and support.

DXF and DWG dominate 2D exchange, while STEP and IGES are the neutral standards for 3D models. STL is used for 3D printing. Before choosing a tool, confirm it can import and export the formats your colleagues, clients or printer require.

CAD installers are large, so download only from the vendor sites listed below to avoid corrupted or repackaged files. Verify any published checksums, decline bundled extras, and make sure your graphics drivers are up to date for smooth 3D performance.