Code Playground

Learn to code, live.

Build with Python, HTML, CSS, JavaScript — or combine them into a real web project. See results instantly. 100% free, forever. Nothing saved on our side.

Web Project — HTML + CSS + JavaScript working together — like a real website.

Progress: 0/3

This is how real websites are built: HTML for structure, CSS for style, JavaScript for behavior. Edit any of the three tabs and the live preview updates instantly. Everything runs in your browser — nothing sent anywhere.

Lessons
Tips
  • ›Switch tabs to edit HTML, CSS or JS.
  • ›Connect them with class names and IDs.
  • ›Open the browser console to see JS errors.
Interactive Counter
Live Preview
Concepts in this lesson
id
A unique label on an element so JS can find it.
addEventListener
Runs your code when something happens (e.g. a click).
textContent
Replaces the text inside an element.
Try this challenge

Add a Reset button that sets the count back to 0.

Everything runs locally in your browser. No accounts, no tracking, no server costs.