Fill every row, column, and box with 1-9. Four difficulties, a daily streak, or unlimited free play.
Sudoku is a classic logic puzzle played on a 9x9 grid divided into nine 3x3 boxes. Fill in the empty cells so that every row, every column, and every box contains the digits 1 through 9 exactly once. Every puzzle on this page is generated fresh with a guaranteed unique solution, no guessing required, just logic.
Choose Easy, Medium, Hard, or Expert depending on how many clues you want to start with. Play a new Daily Challenge every day and build a streak, or jump into unlimited Free Play at any difficulty whenever you want a quick puzzle.
Toggle notes mode to pencil in candidate numbers, use up to three hints per puzzle when you're stuck, and undo your last move any time. 100% free, no download, no account needed.