Generating puzzle…
Sudoku
The classic number puzzle. Every puzzle is freshly generated with a unique solution — pick a difficulty, pencil in notes, and fill the grid without making three mistakes.
How to Play Sudoku
Click a cell or move the selection with the arrow keys, then click a number (or press 1-9) to fill it in — Backspace or Delete clears it. Toggle Notes to pencil in candidates instead of committing.
- Scan rows, columns, and 3x3 boxes that already have the most numbers filled in first — they have the fewest open possibilities.
- Use Notes mode to track candidates in a cell before committing, especially on Hard puzzles where the first guess isn't obvious.
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Frequently Asked Questions
Is Sudoku free to play?
Yes — Sudoku is completely free to play right here in your browser. No download, no install, and no sign-up required.
Can I play Sudoku on my phone or tablet?
Yes. Sudoku is fully playable on touchscreens as well as with a mouse and keyboard, so it works on phones, tablets, and desktop alike.
Is Sudoku multiplayer?
No, Sudoku is a single-player game — it's just you and the game, no opponent required.