Learn while you play

Interactive tutorials

Short, clear lessons with examples, diagrams, and interactive exercises. Run code in the languages supported by the runner, then try the games: fill in code, order lines, spot bugs, and predict output. Free for everyone.

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HTML

The skeleton of every web page

16 lessons · 34 games

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CSS

Colour, spacing and layout

17 lessons · 28 games

JavaScript

The language that makes the web move

45 lessons · 123 games

Python

The friendliest first language

25 lessons · 58 games

C++

The fast language under everything

21 lessons · 50 games

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React

Build interactive UIs from components

21 lessons · 43 games

Next.js

Build full web apps with React

16 lessons · 31 games

SQL

Ask your data questions and get answers

20 lessons · 44 games

DSA

Data structures and algorithms for interviews

23 lessons · 54 games

GIT

Git & GitHub

Protect your history and collaborate with confidence

15 lessons · 30 games

NODE

Node.js

JavaScript for backends, tools and APIs

18 lessons · 36 games