Free online 9x9 Sudoku

Play a freshly generated classic Sudoku puzzle directly in your browser. Each board uses the standard 9x9 grid and has one solution, with no sign-up, download, or saved history required.

Choose the way you want to solve

Three difficulty levels

Start with Easy, move to Medium, or choose Hard when you want fewer given numbers.

Notes and hints

Add candidate numbers to empty cells, erase a move, undo changes, or reveal one correct number when you are stuck.

Mouse, touch, and keyboard

Select cells on screen or use number and arrow keys for a faster solving flow on desktop.

Online Sudoku questions

Is this online Sudoku free?

Yes. The browser game is free to play and does not require an account.

Is my puzzle saved?

No. The puzzle stays only in the current page. Reloading or closing it starts a new session.

What is available in the app?

The Apple app adds daily challenges, challenge history, themes, printing, and other native features for iPhone, iPad, Mac, and Apple TV.