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SolveSpace
GPL-3.0SolveSpace is a lightweight parametric 2D/3D CAD alternative to SolidWorks that provides constraint-based modeling and direct 3D printing exports.
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Overview
A woodworker or 3D printing hobbyist repairing an appliance needs dimensioned, printable parts without enterprise CAD complexity. Commercial engineering suites wrap that simple task in multi-gigabyte installers, mandatory cloud logins, and subscription fees. SolveSpace removes that overhead, delivering a parametric solid modeler under ten megabytes that runs on modest laptops.
Why SolveSpace instead of SolidWorks
SolidWorks centers on proprietary binary formats, Windows-only workstations, and enterprise data management servers. SolveSpace approaches workflow integration through open interchange formats. It exports assets directly for common workshop tools: STL meshes for 3D printer slicers, STEP files for external CAM software, DXF and SVG vectors for laser cutters, and two-dimensional G-code for CNC mills. Every model saves as a human-readable text file (.slvs). Users can track revisions in Git, review modifications through text diffs, and automate exports via solvespace-cli without paying for workstation seat licenses.
The trade-off is feature depth in specialized manufacturing disciplines. SolidWorks provides automated sheet metal unfolding, certified drafting sheets, and structural finite element analysis. SolveSpace strips out these industrial modules to maintain a fast geometric constraint solver. Its assembly tools handle linkages and hinges through mathematical constraints rather than dynamic collision physics. Users must also draft corner radii directly in 2D sketches, as SolveSpace lacks native 3D edge fillets. For makers prioritizing fast export over enterprise drafting, that trade-off is practical.
What it does well
- 2D and 3D geometric constraint solver that automatically resolves dimensions, tangencies, and symmetries without redrawing adjacent geometry.
- Direct export support for STL meshes, STEP solid interchange files, and 2D DXF or SVG vector profiles from the file menu.
- Kinematic linkage simulation for planar and spatial mechanisms, letting users drag parts across their range of motion to check clearances.
- Portable standalone executable under ten megabytes that launches instantly on Linux, macOS, and Windows without dedicated graphics cards.
- Headless automation through
solvespace-clifor scripted batch conversion of CAD models into sliced vectors or triangle meshes.
