MuJoCo in the browser

Real contact physics without a server — how far does MuJoCo WASM go on a laptop?

Input: MJCF models written for this platform (humanoid, arm + gripper, drop scene)
Output: Live simulation state, contacts, grasp result, randomization spread
Demos: 3 · all run in the browser

Loading engine

Drag to orbit · scroll to zoom

Body capsules
Center of mass

Built with Humanoid stand & push

Ten position actuators hold a standing pose; apply a push, lower the PD gain or crouch and watch the balance fail — real MuJoCo contacts stepped at 200 Hz in WebAssembly.

MuJoCo WASM 3.1Physics engine in the browser
Three.js r184WebGL scene, instancing, controls