DEDUPEDWho it is forCurious beginner who heard about free CAD and does not want to install anything
The problemTrying a CAD program usually means a large install and an unfamiliar interface.
The outcomeYou sketch, extrude and resize a simple solid in a browser tab within minutes.
What you need first
- Windows, macOS or Linux desktop, or just a modern web browser (no install needed)
- Rust toolchain only if building from source
- An MCP-capable agent such as Claude Code only for the agent-driven uses
- No paid keys or accounts
Steps
- Open the browser app linked from the README.
- Start a new design and draw a sketch on a plane.
- Extrude the sketch into a solid.
- Edit a dimension in Parameters and watch the solid rebuild.
Prompt for your agent
I want to learn the basics of SolidCraft in the browser. Give me a 5-step exercise to sketch, dimension and extrude a small box with a hole, using only features listed in its README.
Caveat. The browser build runs the same commands as desktop, but very large designs may feel slower in a tab than in the desktop app.
About solidcraft
An open-source 3D CAD app written in Rust that agents can drive. Part of this week's top 10 repos: ranked #6 on Repo Radar. View tangency-labs/solidcraft on GitHub.
More with solidcraft
- Let an AI agent model a part you can still edit Steer an agent through the built-in MCP server and get a real parametric model, not a mesh you can't fix.
- Open and re-export STEP, STL and 3MF files Import a model from another tool and export it as STEP, STL, 3MF, glTF or URDF where supported.
- Check how a small assembly moves before building it Combine parts with joints and run a motion study to spot interference before you print or machine anything.
- Design a 3D-printable case for a dev board Follow the README's Raspberry Pi style workflow: dimensioned sketch, shell, standoffs, port cut-outs, then export for printing.
- Design a bent sheet metal bracket and get its flat pattern Use flanges, hems and fold/unfold to model a bracket, then read out the flat pattern for cutting.
- Watch an agent build a model live in the open app Connect the MCP server to your running SolidCraft window so you can see each modeling step as the agent makes it.
- Generate a STEP file from a JSON command script Run a saved JSON command list from the CLI so the same part can be rebuilt on demand, no GUI.
Disclaimer
Deduped lists open-source repositories that belong to other people. We do not own, maintain, audit, or vouch for any of them, and a repo appearing here is not an endorsement or a safety check. The use cases, steps, and prompts are written by AI and may be incomplete, outdated, or just wrong. Where a use case is marked "Seen in the wild", we link to public posts where someone described something similar, but we have not verified those posts and the use case itself is still our AI's own write-up. Use all of this at your own risk. Only run code, commands, or agents on systems and accounts you are authorized to use, and read the code and every command before you run it, especially anything that touches credentials, files, or the network. Nothing here is professional, security, legal, or financial advice. All trademarks and project names belong to their respective owners, and their use here does not imply affiliation. Content is provided as is, without warranties of any kind. Found a mistake, a safety problem, or something you want removed? Email [email protected] and we will look at it promptly. Full disclaimer page