9x9 Sudoku is the classic format used around the world. The grid includes nine rows, nine columns, and nine 3x3 boxes, and the goal is to place the digits 1–9 exactly once in each. It is the most popular size because it balances depth and accessibility.
Start a puzzle instantly and refresh for unlimited new 9x9 grids. Use notes, hints, and the timer to match your solving style. If you want easier practice, switch to Easy mode; for a bigger challenge, try Hard or Expert.