Preview

Preview Size:

What Is This Code Playground?

This free, browser-based Code Playground lets you write and run HTML, CSS, and JavaScript with a live preview. Switch editor tabs, load examples, test responsive sizes (desktop/tablet/mobile), and go fullscreen—all executed locally in a sandboxed iframe for speed and privacy.

How to Use (Step-by-Step)

Select an editor tab (HTML, CSS, or JavaScript) and write your code.
Click Run (or press Ctrl/⌘ + Enter) to render the preview.
Use Load Example to insert Hello World, Form, Chart, Animation, or Responsive templates.
Try different Preview Size buttons for desktop/tablet/mobile testing.
Use Clear to empty editors, Reset to restore example code, or Fullscreen for a larger preview.

All Tools

Web Tools

Editor Features

Keyboard Shortcuts

Using the Code Playground

Introduction

Basic Features

Limitations