js.mtfm.ioURL with editable javascript embedded

Run and edit JavaScript in the browser. Share and connect self-contained websites with other chunks of code and visualization.

The URL shareable and editable (with AI)

Edit with AI

Copy the AI prompt, paste into Claude or ChatGPT, then copy the result back. Instant shareable code.

All state is embedded in the URL — no server storage. Copy the link and anyone can run your code.

Wire inputs and outputs between metaframes to build apps, workflows, and dashboards.

Use any metaframe as an interactive Jupyter or marimo widget with the metaframe-widget Python package.