mjviser
- Software
- Simulators
- Tool
A web-based viewer for MuJoCo robot and physics models, built on the Viser library and opened in a browser. It is meant for inspecting and simulating models.
Made by mujocolab.
Source on GitHub: github.com/mujocolab/mjviser (opens in a new tab). Facts read at commit ae0b219 (opens in a new tab).
Licenses
- Code
- Apache-2.0 (opens in a new tab)
Read by Robotheca from LICENSE (opens in a new tab) (Apache-2.0) at commit ae0b219 (opens in a new tab), on 22 Oct 2026.
- Commercial use
- Yes
What it does
- Loads a MuJoCo XML model from a path, with fuzzy matching of model names in the current directory.
- Can also load models from the robot_descriptions package by name, when that package is installed.
- Offers simulation controls, joint and actuator sliders, contact and force display, camera tracking, and keyframes.
- Python API via a Viewer class that accepts optional step, render, and reset callbacks.
- Lower-level ViserMujocoScene lets users add their own Viser GUI elements and scene overlays.
- Several example scripts cover custom controllers, manual loops, parallel environments, and trajectory playback.
Written by Robotheca from the project's README (opens in a new tab) at commit ae0b219.
Getting started
- Difficulty
- Intermediate
- Hardware it needs, as the project states it
- No other hardware is stated.
- How to start
- The project's README (opens in a new tab)
Maintenance
- Status
- Active: a commit in the last 90 days
- Newest commit
- 7 Aug 2026 on main
- Latest release
- None published on GitHub
Checked on GitHub on 22 Oct 2026.
Links
Robots that can run it
No robot on Robotheca is linked to it yet. Links come from a robot's robot.yaml, from its dependency files read as text, or from Robotheca's editors.
Robotheca lists software as a reference: nothing is hosted or run here, and every fact links to where it was read.