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About Playoku
Playoku is a free online Sudoku game built around one idea: open the page and start solving right away, on any device, with nothing in your way.
What you get
- Three grid sizes: 4×4, 6×6 and the classic 9×9.
- Four difficulty levels: Easy, Medium, Hard and Expert.
- Real solving tools: pencil notes, hints, undo/redo and full keyboard support.
- Quality puzzles: every board is generated fresh and has exactly one solution, reachable by logic alone.
- Shareable links so you can race a friend on the identical puzzle.
- Dark mode and auto-save: close the tab and pick up where you left off.
How difficulty works
Rather than counting clues, Playoku grades each puzzle by the hardest logical technique it actually requires. That way an "Easy" board really is easy, and "Expert" really will test you. Learn those techniques in our tips & strategies guide, or start with how to play Sudoku.
Free, forever
Playoku is completely free and needs no account. Got feedback or a bug to report? We'd love to hear from you on the contact page.