🎮 Browser Game
Sudoku Online
Easy, Medium & Hard — fresh puzzles every game. Free & no download!
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Select a cell and enter a number
How to play
Fill the 9×9 grid so every row, column, and 3×3 box contains digits 1–9 exactly once. Click a white cell to select it, then click a number from the pad. Gray cells are fixed clues. Use Check to find errors, Solve to reveal the answer.
Frequently Asked Questions
How do you play Sudoku?
Fill the 9×9 grid so every row, column, and 3×3 box contains the digits 1–9 exactly once. Click a cell to select it, then click a number. Pre-filled (gray) cells are fixed.
What does the Check button do?
The Check button highlights all incorrect cells in red so you can fix your mistakes.
What does Solve do?
The Solve button reveals the complete solution. Use it if you're stuck!
Can I play Sudoku on mobile?
Yes! Tap a cell to select it, then tap a number from the pad below. The game is fully touch-optimized.