Sudoku Generator
Generate a fresh Sudoku puzzle with a single solution at your difficulty.
Quick answer: enter your details below and click Generate Puzzle — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Everyday & Lifestyle
Enter your details below.
How to use
- Choose easy, medium, or hard.
- Click Generate Puzzle.
- Fill each row, column, and 3 by 3 box with digits 1 to 9.
- Use dots for empty cells and check your answer against the solution button.
About this tool
This generator builds a complete Sudoku grid, then removes numbers one at a time, keeping a removal only when the puzzle still has exactly one solution. That check is what makes the puzzle properly solvable rather than guesswork. Choose easy, medium, or hard, and use 0 or a dot for each empty cell.
Frequently asked questions
What do the dots mean?
A dot is an empty cell waiting for a digit. Every row, column, and 3 by 3 box must end up holding the digits 1 to 9 exactly once.
Which difficulty should a beginner pick?
Easy, with the fewest empty cells and the most starting clues to work from.