Start with the row or box that has the fewest empty squares.
English
Numbers
Play Sudoku
online for free.
Play Sudoku online
Difficulty
Choose a square to begin.
Keyboard ready1–9 enter · arrows move · D drafts · Delete erases
Game introduction
What is Sudoku?
Fill each row, column and 3×3 box with 1–9, without repeats.
Start with the row or box that has the fewest empty squares.
- Category
- Numbers
- Difficulty
- Easy–Evil
- Typical game
- 8–15 min
How to play
How to play Sudoku
- Select an empty square, then choose a number from 1 to 9.
- Each row, column, and 3×3 box must contain every number exactly once.
- Turn on Draft to write possible numbers in a cell.
- Use Hint to fill in one correct number when you get stuck.
A little help
Sudoku tips
Good to know
Sudoku Frequently asked questions
Is Sudoku free to play online?
Yes. You can play the full Sudoku game free in your browser with no account, subscription or download.
Which Sudoku difficulty should I choose?
Start with Easy if you are learning, choose Medium or Hard for deeper deduction, and try Expert or Evil when you are comfortable tracking several candidates at once.
Can I use pencil marks in this online Sudoku?
Yes. Turn on Draft to place small candidate numbers in a cell, then remove them as the row, column, and box reveal the correct digit.
Can I play Sudoku on a phone or tablet?
Yes. The game is designed for touch screens as well as mouse controls, with keyboard controls included where they suit the puzzle.