Question 1

How do I play Sudoku?

Accepted Answer

Fill the 9×9 grid so each row, column, and 3×3 box contains digits 1–9 exactly once.

Question 2

Does this Sudoku have a solver?

Accepted Answer

Yes. Use Solve → One Step for a hint or Solve → All to finish the puzzle automatically.

Question 3

Is there dark mode?

Accepted Answer

Yes. Toggle dark mode with the moon/sun button. Your preference is saved.

Question 4

Is it free to play?

Accepted Answer

Yes, the game is free, runs in your browser, and works on desktop and mobile.

Play Sudoku Online — Dark Mode, Solver & Timer

How to play