In-browser robotics playground
Simulator
Write a control(state, dt) function. Hit Run. The robot obeys your physics. No install, no Docker.
⚙️
Loading simulator...
Rapier 3D physics + Monaco editor
Real physics
Rapier 3D (Rust → WASM) for rigid-body dynamics, joints, and contact forces. The same engine used in game studios.
Real code editor
Monaco — the engine behind VS Code. Syntax highlighting, autocomplete, keyboard shortcuts you already know.
Edit → Run → Watch
Change a constant, hit Run, see the robot swerve. Feedback loop in milliseconds. Fail cheap, learn fast.