Play free Sudoku online & printable 9×9 puzzles

Play free 9×9 Sudoku puzzles online right away in Medium, Easy, Hard, or Expert difficulty. Includes pencil notes, hints, and printable Sudoku sheets.

Fill every row, column, and 3×3 block with the numbers 1 through 9 without repeating any number.

Classic 9×9 Medium Sudoku: 1–9 logic grid — Opens directly in Medium difficulty with level selector, hints, and 1-click printing.

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