HTML, CSS & JS Compiler

Editor

Online HTML, CSS & JS compiler with live preview.

The Code Playground is a free online HTML, CSS and JavaScript editor with a live preview, a console and a VS Code-style Monaco editor — no sign-up and no setup. Edit the three files and the preview re-renders as you type, errors surface in the console, and a built-in AI can write or fix code for you. Everything runs in a sandbox in your browser, so nothing you write is uploaded.

How to use HTML, CSS & JS Compiler

The Code Playground is a free online editor for HTML, CSS and JavaScript with a live preview, a console and a VS Code-style Monaco editor. Type code and see the result update instantly, or describe what you want and let the built-in AI write or fix it. Everything runs in your browser — nothing is uploaded.

1Write HTML, CSS and JS in the three tabs.
2Watch the live preview update as you type.
3Use 'Ask AI' to generate or fix code, and check the console for logs.

Live preview + console

See your page render instantly and catch errors in the built-in console.

VS Code editor

Monaco gives you syntax highlighting, autocomplete and familiar shortcuts.

Write code with AI

Describe what you want and the AI writes or edits the code for you.

Build an HTML, CSS & JS page with live preview

Edit the three tabs and watch the preview re-render instantly — no account, no build step. A fast way to put a page together or test a layout idea, with the console ready to catch any JavaScript errors.

Run front-end code online

Paste a snippet of HTML, CSS or JS and see it run immediately in a sandboxed iframe. Ideal for trying a component, a CSS effect or a bit of script without setting up a local project.

Prototype a UI quickly

Iterate on markup and styles with immediate visual feedback, then copy the code into your project. Because it runs in your browser, nothing you experiment with is uploaded anywhere.

Generate front-end code with AI

Describe what you want — for example "add a dark-mode toggle" — and the built-in AI writes or edits the code in the active tab, so you can go from idea to a working preview in seconds.