Sudoku online
Play Sudoku online with easy, medium, and hard puzzles. Use notes, hints, checks, keyboard controls, and local best times without creating an account.
Time
0:00
Best
--:--
Empty
43
Tap a cell, then choose a number. Desktop users can move with arrow keys, type 1 to 9, erase with Backspace, and press N for notes.
A focused Sudoku board for daily logic practice
Sudoku is a number puzzle where every row, column, and 3 by 3 box must contain the digits 1 through 9. The rules are simple, but each empty cell asks you to compare candidates and narrow the board step by step.
This browser Sudoku board includes notes, hints, a check button, keyboard movement, and touch-friendly number buttons. Easy, medium, and hard puzzles give you a short warm-up or a longer logic session depending on how much time you have.
Your puzzle runs locally in the browser. Best times are stored with localStorage on the same device, so you can replay and improve without login, uploads, or server-side profiles.
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