Solve daily sudoku puzzles online on your smartphone (both in portrait and landscape) or laptop. Assess neat design of this classic brain-teaser with the Undo option and lots of settings available in the Menu. For instance, toggle Show Errors to reveal the mistakes. Use Auto Cleanup to erase all wrong digits at once, or choose to do it manually. Switch off timer if you prefer to focus on your board game without restraints. Use Notes to solve hard and expert sudoku puzzles, and reveal a cell in case you need a prompt. And come back tomorrow for your next free online sudoku challenge.