Unique Sudoku Generator
Generate 9×9 Sudoku puzzles with checked unique solutions, browser entry cells and printable answers.
Generate unique 9×9 puzzles
Every removed clue is checked with a solution counter. A puzzle may retain more than the target to preserve one solution.
Your result
Ready when you are
Make up to four 9×9 puzzles, solve them here or print them with optional solutions.
How to use this tool
Generate 9×9 Sudoku puzzles with checked unique solutions, browser entry cells and printable answers.
- Choose a clue target and 1–4 puzzles.
- Generate, then solve in the browser or print the puzzles. Check your entered values when ready.
- Toggle solutions or export the puzzle data. JSON includes the answer grids.
About the results
Only 9×9 Sudoku is supported. Each clue removal is accepted only after a solution count of exactly one; a bounded solver can retain extra clues. Clue targets are not human-technique difficulty grades.