Free unlimited Sudoku
The classic number puzzle — fill every row, column and 3×3 box with the digits 1 to 9. Easy, medium and hard boards, a daily challenge with streaks, hints and mistake highlighting. No login, no download.
♾️ Unlimited puzzles
🎚️ Easy · Medium · Hard
★ Daily challenge
📱 Plays on any device
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About this Sudoku
Sudoku is the world's most popular logic puzzle. Every board here is generated fresh and is guaranteed to have a single solution reachable by pure logic — no guessing. Pick your difficulty, or take the shared Daily Challenge and build a streak.
How to play
- Each row, each column and each 3×3 box must contain the digits 1–9, once each.
- Tap a cell, then tap a number — or use your keyboard.
- Duplicate numbers are highlighted so you can spot mistakes.
Frequently asked questions
- Is it free?
- Yes — free and unlimited, supported by ads.
- Do I need an account?
- No login. Your streak and best times are saved in your browser.
- Are the puzzles always solvable?
- Yes — every board has exactly one logical solution.