Optional · two minutes to set up

AI tutor

An AI that explains topics again, reviews your code and comments on it, and writes you unlimited practice questions.

How this works, and why it is safe. This site has no server, so the AI runs from your browser using your own free key. Your key is stored only on this device, is sent only to the provider you pick, and is never uploaded anywhere. Nobody else can use it, and it does not share a quota with the rest of your class.
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Step 1 — pick a provider

All of these are free. Groq is the fastest and has the most generous free tier.

Step 2 — create your key

  1. Pick a provider above to see its exact steps.

Step 3 — paste it here

Keeping your key safe. Treat it like a password. Do not paste it into a shared computer, and delete it at the provider's site when the course ends. If you ever commit a key to a public GitHub repo, revoke it immediately — bots scan for them within minutes.

Ask anything about the course

Stuck on a concept? Ask in your own words.

Review my code

Paste anything you have written. The AI comments on it the way a teacher would — what works, what to fix, and one thing to try next.

Your code

Generate practice questions

Fresh questions on any topic, as many times as you like. The built-in bank already has 185 — this is for when you want more on one specific topic.