SolidCraft

An open-source parametric 3D CAD application built in pure Rust.
Sketch, constrain, and build solids with a parametric feature timeline. Change a dimension and watch your model rebuild. Run it on your desktop, in your browser, or let AI agents model through the built-in MCP server.

Website · Download · Try it in the browser · Documentation · Discord · SolidCore

A Raspberry Pi 4 case from an empty design: a sketch dimensioned with the board's parameters, extrude, fillet, shell, the rim rounded in one pick, an M2.5 standoff patterned on the 58 × 49 mm hole rectangle, port cut-outs, vent slots, "Pi 4" engraved in DejaVu Sans Bold and a PETG material defined in the design, with its mass in Properties, then height 24 → 32 mm in Parameters and it all rebuilds. 6× playback with the idle pauses cut. Full video, recorded with the demo script.

Download

• Windows: the installer.
• macOS: the disk image (Apple silicon and Intel).
• Linux: the AppImage, or sudo snap install solidcraft (Snap Store).
• Web: try it in your browser, no install.

ARM64 and 32-bit builds, portable zip, .deb, .rpm, Flatpak and the other packages are on the downloads page. The macOS app is signed with a Developer ID and notarized by Apple. The Windows downloads aren't signed yet: choose More info, then Run anyway in SmartScreen. On SolidCraft 0.11 to 0.14, download once by hand; see updating.

What works

Early but usable for simple parts: 75 of 76 public reference parts match their analytic or FreeCAD-computed volume, area, centre of mass and bounding box (oracle); the other is a tracked bug.

• Sketches and constraints: lines, arcs, splines, text and more, solved by our own constraint solver, with parameter-driven dimensions.
• Features: extrude, revolve, sweep, loft, fillet, chamfer, shell, draft, holes, threads, patterns, mirror, split and combine on an editable parametric timeline.
• Parameters and configurations with unit-aware expressions.
• Assemblies with joints, motion studies, contact sets, interference and mass properties.
• Sheet metal with flanges, hems, fold/unfold and flat patterns, and plastic enclosure features.
• Files: STEP, IGES, 3MF, STL, OBJ and glTF in and out where supported, URDF export, .sc designs (.solidcraft files from earlier releases still open).
• Desktop app, browser app, headless CLI and MCP server, all running the same commands.

The full list is in docs/capabilities.md and docs/features.md; status and plans are in ROADMAP.md. See also what people built, 3D mouse support and the architecture.

Build from source

cargo run --release -p solidcraft -- --sample      # desktop app with a sample part
cargo run --release -p solidcraft-cli -- commands  # the command registry
cargo run --release -p solidcraft-cli -- run examples/bracket.json --out bracket.step
cargo xtask ci                                     # fmt, clippy, tests, icons, assets, layers, wasm

More commands, the Windows cross-build and the browser build are in docs/building.md.

AI agents (MCP)

solidcraft-cli mcp is a Model Context Protocol server. Headless it runs its own design session, or with --connect it drives the running app so you can watch. Claude Code: claude mcp add solidcraft -- solidcraft-cli mcp. If a terminal doesn't find solidcraft-cli (older Windows installers don't put it on PATH), give its full path (by default "C:\\Program Files\\SolidCraft\\solidcraft-cli.exe"). Tools, access rules and an example session: docs/mcp.md.

Scripts

A script is a JSON list of the same commands the UI runs, executed with solidcraft-cli run. Format and example: docs/scripts.md. Pages can also be driven through the browser command API.

Contributing

Help is welcome. CONTRIBUTING.md covers how to build and test, the code map, the clean-room and licence rules, and where help is wanted most. Open work is in GitHub issues; chat is on Discord.

Sponsors

SolidCraft's continuous integration runs on Blacksmith, which sponsors its CI minutes.

Disclaimer

The files in this repository are provided as is, without warranty, liability or indemnity, and Tangency Labs and the contributors accept no responsibility for any harmful or unlawful use of them: read DISCLAIMER.md.

Licence

MIT OR Apache-2.0, at your option. Developed under the clean-room contribution rules; third-party code and assets retain their documented licences and attribution.

SolidCraft is independent. Behaviour is designed from public documentation, general CAD conventions and user feedback. Reference tests use analytic values and open-source tools. SolidCraft is not affiliated with, sponsored by or endorsed by Autodesk, Dassault Systèmes, PTC, Siemens or any other CAD vendor. Fusion, AutoCAD, Inventor, SolidWorks, Onshape, Creo, Blender and Tinkercad are trademarks of their respective owners, named only to describe compatibility (see NOTICE).