How to Use React Playground
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1. Write a React Component
Type a functional component using JSX, hooks, state, or props in the editor.
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2. Click Run
Press Run or ⌘↵. Babel transpiles JSX in-browser and mounts your component to the preview.
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3. See the Live Preview
Your component renders in the Preview panel. Console logs appear in the Console tab.
The Technical Details
This interactive web utility provides fast, reliable, and completely private data transformations. In modern workflows, quick formatting, conversions, or estimations are essential. By running all logic entirely in your browser with client-side JavaScript, this tool guarantees that your data never leaves your machine. This approach delivers maximum performance and absolute data privacy, as no information is ever sent to a server.
Frequently Asked Questions
Can I use React hooks?
Yes. useState, useEffect, useRef, useCallback, useMemo, and all built-in React 18 hooks are available.
Can I install npm packages?
No. Only React 18 and ReactDOM loaded from CDN are available. No external libraries.
Is JSX compiled on the server?
No. Babel runs in your browser to transpile JSX before execution; no server involved.
Which React version is loaded?
React 18 is loaded from the official CDN (unpkg.com/react@18).