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Play Sudoku Online
Fill the grid. Use logic. No math required. Free, instant, no downloads.
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What Is Sudoku?
The classic number-placement puzzle. Fill each row, column, and 3×3 box with the digits 1–9 without repeating. Multiple difficulty levels from beginner to advanced.
Sudoku runs entirely in your browser with no downloads or signups required. It works on desktop and mobile devices. Whether you have five minutes or an hour, Sudoku is a perfect way to relax and challenge yourself.
Controls
| Key | Action |
|---|---|
| Click / Tap | Select a cell |
| 1–9 | Place a number |
| Delete / Backspace | Clear a cell |
Tips & Strategy
- Start with rows, columns, or boxes that already have the most numbers.
- Use pencil marks to track possibilities in each cell.
- Look for "naked singles" — cells where only one number can go.
- If you're stuck, scan for hidden pairs in rows and columns.
Frequently Asked Questions
Is Sudoku free to play?
Yes. Sudoku is completely free to play in your browser with no downloads or signups required.
Can I play Sudoku on my phone?
Yes. Sudoku works on mobile devices and tablets. Touch controls are supported.
Do I need to create an account?
No. Just open the page and start playing instantly. No registration needed.