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Free Interactive Courses

Learn to Code, Hands-On

Bite-sized lessons with a real code editor and instant feedback — no setup, right in your browser. Free forever.

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Learn Python 3

Master the 20% of Python that powers 80% of real-world code. Bite-sized interactive lessons — write real code from minute one, right in your browser.

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Learn Java

Write and run real Java right in your browser — compiled for real, no setup. Master the core 20% of Java that powers 80% of the code you will actually write.

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Learn JavaScript

The language of the web — run it natively in your browser with instant feedback.

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Learn SQL

Query real databases in your browser — a real SQLite engine runs your SQL instantly.

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Learn HTML

Build real web pages and see them render live as you type.

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Learn CSS

Style web pages and watch your changes render live.

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Learn React

Build interactive UI components — rendered live in your browser with real React.

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