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Code Playground

Write HTML, CSS, and JavaScript with instant live preview. Powered by Monaco — the same editor behind VS Code.
Monaco Editor

VS Code's editor with syntax highlighting, autocomplete, and error detection

Live Preview

See your changes instantly with auto-run or manual refresh mode

Export & Share

Download your work as a standalone HTML file or copy the full code

Privacy First

Everything runs in your browser. No data is sent to any server

Preview

Free Online Code Playground

Our Code Playground is a free online editor for building web pages with HTML, CSS, and JavaScript. Powered by Monaco — the same editor engine behind VS Code — it provides a professional coding experience with syntax highlighting, IntelliSense, and error detection, all running directly in your browser.

Key Features

  • Monaco Editor: Professional-grade code editor with syntax highlighting, autocomplete, and bracket matching
  • Live Preview: See your HTML, CSS, and JS render in real time with auto-run
  • Templates: Pre-built starter templates including a CSS animation demo and Todo app
  • Dark/Light Theme: Switch between editor themes for comfortable coding
  • Download: Export your creation as a single HTML file
  • Sandboxed: Preview runs in a secure sandbox for safe code execution

Perfect For

  • Learning HTML, CSS, and JavaScript with instant feedback
  • Prototyping UI components and layouts quickly
  • Testing CSS animations and transitions
  • Building small web demos and experiments
  • Sharing code snippets as downloadable HTML files
  • Practicing coding challenges and exercises

Frequently Asked Questions

Yes, the Code Playground is completely free with no signup, login, or usage limits. Write and preview as much code as you want.

No. All code runs entirely in your browser using a sandboxed iframe. Nothing is sent to any server, so your code stays private. However, code is not persisted — if you refresh the page, it resets.

The playground supports HTML, CSS, and JavaScript — the core web technologies. You can build complete web pages, animations, and interactive apps right in the editor.

Yes! Click the Download button to save your work as a single .html file that includes your HTML, CSS, and JavaScript. You can open it in any browser.

When Auto-run is enabled, the preview updates automatically as you type (with a small delay). Turn it off for Manual mode where the preview only updates when you click the Run button — useful for complex code.

Yes! Use the Templates dropdown to load pre-built examples including a Starter template, CSS Animation demo, and a Todo App. These help you learn and get started quickly.

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