Sudoku Online - Free Sudoku Puzzles Online

About Sudoku Online

Sudoku Online offers classic 9x9 sudoku with four difficulty levels, from Easy to Expert. Fill every row, column and 3x3 box with the digits 1 to 9 exactly once. Extra modes like X-Sudoku, Windoku and Killer Sudoku add new rules when you want a fresh challenge.

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 Online

Select a cell and enter a number from 1 to 9. Every row, column and 3x3 box must contain each number once. Start with the cells that have the fewest options.

Sudoku Online FAQ

Is Sudoku Online free to play?

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

Can I play Sudoku Online on my phone?

Yes. Sudoku Online 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 Online?

Sudoku Online is a puzzle game (puzzle, sudoku).

How do you play Sudoku Online?

Select a cell and enter a number from 1 to 9. Every row, column and 3x3 box must contain each number once. Start with the cells that have the fewest options.