Free Online Sudoku
Start a clean, fast Sudoku puzzle on Math9. It is built for daily logic training, short puzzle breaks, and printable offline solving.
Easy, medium, hard, and expert puzzles
Notes, reasoning hints, timer, and local progress
Print the current board with a light Math9 URL footer
FAQ
Is Math9 Sudoku free?
Yes. Math9 is free to play online and does not require registration.
Can I print a Sudoku puzzle?
Yes. Use the Print button to open a clean board-only print page.
Do hints reveal the answer?
Math9 hints focus on reasoning, candidates, and logical explanation rather than a bare answer.