Sudoku - Classic Sudoku Online

About Sudoku

Sudoku is the classic 9x9 number puzzle. Fill every empty cell with numbers from 1 to 9 so each row, column and 3x3 box contains every number exactly once. Use notes to track possible numbers on harder grids.

Game info

Category: Puzzle
Works on: PC, Android and iPhone and iPad
Screen: Portrait
Players: Single player
Price: Free
Download: None, plays in your browser

How to play Sudoku

Click a cell, then click the number you want to place. Each row, column and 3x3 box needs every number from 1 to 9. Use Notes to mark possible numbers.

Sudoku FAQ

Is Sudoku free to play?

Yes. Sudoku is free to play online on 20-0 with no download and no sign-up.

Can I play Sudoku on my phone?

Yes. Sudoku works on PC, Android and iPhone and iPad, right in the browser. It is made for holding your phone upright.

What kind of game is Sudoku?

Sudoku is a puzzle game (sudoku, puzzle, logic, brain).

How do you play Sudoku?

Click a cell, then click the number you want to place. Each row, column and 3x3 box needs every number from 1 to 9. Use Notes to mark possible numbers.