Play Sudoku free in your browser. Three difficulty levels. Fill the 9x9 grid with numbers 1-9. No download required.
Fill the 9×9 grid so that every row, every column, and every 3×3 box contains the digits 1-9 exactly once. Numbers given at the start are fixed clues — you fill in the rest.
Our Sudoku offers Easy, Medium, and Hard difficulty levels. Easy puzzles have more given numbers and simpler logic. Hard puzzles require advanced techniques like X-Wing or Swordfish patterns.
Start with rows, columns, or boxes that have the most given numbers. Use elimination — if a number appears in 8 of 9 cells in a row, the remaining cell must contain it. Look for 'naked singles' (cells with only one possible value) first.
Our Sudoku game includes a hint system to help when you're stuck. Use hints sparingly to maintain the challenge and improve your solving skills over time.