Getting Started with RunMat

Get up and running in minutes. Try RunMat in your browser with no installation, or install the CLI for the terminal and local scripts.

Launch Browser App

No installation required. Works in Chrome, Edge, Firefox, and Safari.

Choose your path

RunMat in the browser gives you a full IDE—editor, file explorer, console, and live plots—all running locally. No installation. Visit runmat.com/sandbox to start. Works in Chrome, Edge, Firefox, and Safari. For GPU acceleration, use a browser with WebGPU (Chrome 113+, Edge 113+, Safari 18+, Firefox 139+).

The interface

Three main areas: Sidebar (file tree, + to add files), Editor (code, Cmd/Ctrl+S to save), Runtime Panel (Run, Figures, Console, Variables). Panels are resizable.

1Run the demo

When you open the sandbox, demo.m is already loaded:

a = 0:pi/100:2*pi;
b = sin(a);

plot(a, b);

Click the purple ▶ Run demo.m button in the Runtime Panel. A Figure tab appears with the sine wave; the Variables tab shows workspace variables with types, shapes, and CPU/GPU residency.

2Edit and experiment

Try adding a title to the plot in demo.m:

title("Sine Wave");

Use Ctrl+Enter (Windows/Linux) or Cmd+Enter (macOS) to run without clicking the button.

3Create your own script

Click + in the sidebar → Create file (.m) → name it (e.g. my_script.m). The editor supports standard MATLAB syntax; large arrays get automatic GPU acceleration via WebGPU.

Sandbox storage: Files live in your browser tab. No account required; your code never leaves your machine. Files are cleared when you close or refresh the tab—copy code out or use the CLI for persistent work.