NUMBER · ALL AGES
Sudoku Online
Solve classic and special Sudoku boards with adjustable difficulty and helpful note-taking tools.
HOW TO PLAY
How to play Sudoku Online
Fill each row, column and 3×3 box with digits 1 through 9 exactly once. Use notes to track possible values.
Number play encourages attention, planning and flexible problem-solving through short, replayable challenges.
Sudoku Online works directly in your browser with no download or account required. Choose a challenge, play at your own pace and take a break whenever you need one.
