Play Sudoku for free online. Choose from three difficulty levels — Easy, Medium, and Hard. Fill the classic 9×9 grid using logic: each row, column, and 3×3 block must contain the digits 1 through 9 with no repeats.
Fill the 9×9 grid so that every row, every column, and each 3×3 subgrid contains the digits 1 through 9. No number can repeat in the same row, column, or block.
Notes mode lets you pencil in small candidate numbers in empty cells. Toggle notes mode with the Notes button or N key. When you place a real number, it is automatically removed from notes in the same row, column, and block.
Yes! A timer tracks how long it takes you to solve the puzzle. Your best time is saved for each difficulty level.
When error highlighting is on, any cell you fill that conflicts with Sudoku rules will be shown in red so you can quickly spot and correct mistakes.
Yes! This Sudoku game is fully responsive and supports touch controls. Tap a cell to select it, then tap a number button to fill it in.
If you enjoyed this game, you'll love these free online games too:
Sudoku is a world-famous logic puzzle. Fill a 9x9 grid so every row, column, and 3x3 box contains the digits 1 through 9. No math required - just logic and patience. Three difficulty levels keep beginners and experts equally challenged.
This free browser Sudoku works on any device. Tap a cell to select it, then tap a number to fill it in. Includes pencil marks, hints, and an error checker for a smooth solving experience.