How are the Sudoku puzzles generated?
The generator creates a valid completed Sudoku grid and then removes selected numbers while checking that the remaining puzzle still has exactly one solution.
Games
Sudoku Generator
Generate unique Sudoku puzzles and download puzzles or solutions as PNG, JPG or PDF directly in your browser.
Tool
Sudoku Generator
Generate unique Sudoku puzzles and download puzzles or solutions as PNG, JPG or PDF directly in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Create a new 9 × 9 Sudoku puzzle with an easy, medium, hard or expert difficulty level. Each generated puzzle is checked for a unique solution and can be played online or downloaded with its solution as PNG, JPG or PDF. Puzzle generation and file creation take place entirely in your browser.
Examples
- Generate an easy Sudoku for beginners
- Create a hard Sudoku with a unique solution
- Download a puzzle or solution as PNG, JPG or PDF
Frequently Asked Questions
Does every generated Sudoku have a unique solution?
Yes. The generator verifies uniqueness before presenting the puzzle so that only one completed grid satisfies all clues.
What do the difficulty levels mean?
Difficulty is based on the number and arrangement of clues together with the solving techniques required, rather than only the number of empty cells.
Can I generate another puzzle with the same difficulty?
Yes. You can create as many new puzzles as needed while keeping the selected difficulty level.
Can I download the puzzle and its solution?
Yes. The puzzle and completed solution are available separately as PNG, JPG or one-page PDF downloads.
Are generated puzzles stored online?
No. Generation happens locally in your browser and the puzzle is not uploaded or permanently stored.