Free Online Sudoku
Play unlimited puzzles from gentle to fiendish, learn every solving technique, and sharpen your logic — all in one calm, fast, distraction-free place.
Brilliant!
Where would you like to start?
Pick your level
From a gentle easy Sudoku to a fiendish evil grid, every level plays the same clean way.
Easy →New to Sudoku?
Learn how to play in two minutes with a worked example.
How to Play →Solving techniques
Master every method, from scanning to the X-Wing.
Techniques →Ready for a challenge?
Step up to hard, expert and evil puzzles that demand real logic.
Hard →Play Sudoku online, free
Sudoku is a logic puzzle played on a 9×9 grid divided into nine 3×3 boxes. Fill every row, column and box with the digits 1 to 9 — each digit appears exactly once in each. That is the whole game: no arithmetic, just deduction.
Sudoku.tips keeps it pure. Every puzzle is generated fresh in your browser and guaranteed to have a single solution, so there is always a path to the answer using logic alone — never guessing. Smart pencil marks, instant mistake flagging, peer highlighting and full keyboard support make solving fast and comfortable on phone, tablet or desktop.
Pick a difficulty to start, or learn the rules first. No account, nothing to install, and no ads getting in your way.