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Code Playground

Live HTML/CSS/JS editor with instant preview — like CodePen, no account needed

About Code Playground

Write and run HTML, CSS, and JavaScript with instant live preview — like CodePen, no account needed, entirely in your browser.

How to use Code Playground

  1. 1Choose a starter template (Hello World, Flexbox, Animation, Canvas) or start blank.
  2. 2Write HTML in the first panel, CSS in the second, and JavaScript in the third.
  3. 3Enable 'Auto-run' to see changes instantly, or click 'Run' to manually trigger the preview.
  4. 4Toggle between vertical and horizontal layout to fit your screen.
  5. 5Copy the full HTML output or download it as a standalone HTML file.

Tips

  • Use the Canvas template as a starting point for generative art or interactive visualizations.
  • Disable auto-run when writing complex JavaScript to avoid errors during incomplete edits.
  • The downloaded HTML file is self-contained — open it in any browser without a server.

Related tools

OneKitTools TeamUpdated 2.21.4