A free online Sudoku puzzle game. Play classic 9×9 Sudoku with three difficulty levels: Easy, Medium, and Hard. Click cells to select them, then enter numbers to fill the grid. Use the Hint button to reveal a single cell, or Solve to see the full solution. The game validates your moves and celebrates when you complete the puzzle.
Choose a difficulty level: Easy, Medium, or Hard.
Click an empty cell to select it.
Click a number on the keypad to fill it in.
Complete all cells or use Hint/Solve for help.
Fill the 9×9 grid so that each row, column, and 3×3 box contains the digits 1-9 exactly once. Click a cell, then click a number to fill it.
The game will flash the cell red when you place an invalid number. You can click ✕ to clear it.
Free online tool — works in your browser, no sign-up required. Start using it right now.
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