Sudoku Online Free

Sudoku Online Free — Play Sudoku, No Registration

Sudoku is a classic logic puzzle played on a 9×9 grid. Play Sudoku online for free on this page: fill every row, column, and 3×3 box with digits 1–9 without repeating any number. Free Sudoku starts instantly with no registration and no download.

Time 00:00 Errors 0/3

How to play

Each 3×3 box, row, and column must contain the digits 1–9 exactly once. Left-click an empty cell to select it, then choose a number. Right-click (or long-press on mobile) to toggle pencil marks. Click any filled cell to highlight all same numbers.

From classic Sudoku to murder mystery logic

The number grid is a useful warm-up, but these guides explain how crime stories change the deduction surface.

Murder mystery Sudoku

See how suspects replace numbers and rooms replace boxes.

Murdoku vs Murdle

Compare two different ways to turn a murder case into a logic grid.