Free sudoku online

Sudoku is a logic puzzle with no maths and no guessing: fill the grid so that each number from 1 to 9 appears once in every row, column and box. Start on an easy level and work up, using notes to keep track of what could go where. Alongside classic 9×9 grids, you will also find versions with emojis, extra lines, blocks and even a 3D cube. Start with Master Sudoku or Sudoku Sudoku Online.