Play Sudoku free

Play free Sudoku with notes, hints, unique-solution puzzles, and a 20-level journey. Save your puzzle locally and continue offline.

Typical game: 5–25 min. No download or account required.

How to play Sudoku

1. Fill every row, column, and 3 × 3 box with the numbers 1 through 9 exactly once. Starting clues cannot be changed.
2. Use Notes to pencil in candidates, Erase to clear an entry, and Hint to reveal a selected editable square. Conflicting numbers are marked.
3. The 20-level journey reduces starting clues from 58 to 27. Every puzzle has one solution. Clear a level without hints or reveal to unlock the next. Free play retains Easy, Medium and Hard. Difficulty refers to clue density, not a human technique rating.
4. Computer Solve reveals the answer after confirmation. Hints and solves mark a puzzle as assisted. Sudoku is a solo game.

Play your way

Solve solo with notes, hints, and a level journey. Progress is saved locally in your browser. You can resume games, start again, and read the rules while playing.

Can I play offline?

Yes. Open the game collection while connected first so it can save its offline files. Continue in the same browser and device. Clearing browser storage removes local saves. The rules page is also available in the offline cache.

More free games