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- Conflicts: None
- Solution: Unknown
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Classic Sudoku
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Print a set of sudoku puzzles for free every day. Choose from different sudoku types and difficulty levels, include answers, and access solving steps and tutorials anytime. Enjoy the logic puzzle game!
How to Make a Sudoku Puzzle
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1
Choose a grid type
Pick 4×4, 9×9 or Samurai — each grid keeps its own cached board and pencil marks so you can switch any time.
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2
Fill or erase digits
Use the on-screen number pad or your physical keyboard. In Start-from-Full mode, click any cell to erase it. Pencil mode lets you jot candidate numbers in a cell.
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3
Verify as you type
Conflicts, unique-solution count and difficulty rating update live with every keystroke — design a printable puzzle that solves cleanly.
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4
Export or share
Pick PNG / SVG / JPG / PDF and click Download / Print, or hit Share Link to send your custom Sudoku to friends.
Frequently Asked Questions
How do I make a Sudoku puzzle from scratch?
Open the Sudoku Maker, pick a 4×4, 9×9 or Samurai grid, switch to Fill-in-Blanks and type the digits you want. The engine validates conflicts, unique-solution count and difficulty rating as you type, so you know the moment your board becomes a valid playable puzzle.
Can I make my own 9×9 Sudoku?
Yes. Select 9×9 in the Grid Type control, then either type digits into an empty board (Fill-in-Blanks) or erase digits from a full board (Start-from-Full). The status bar shows you exactly how many clues remain and whether the result is solvable.
Can I create a custom Sudoku with my own difficulty?
Yes — design any layout you like and the live difficulty rating (Beginner → Extreme) recalculates automatically. You can also pick a difficulty from the Generate control to spin up a known-rating puzzle in one click.
Is the Sudoku Maker free to use?
Yes. The Sudoku Maker is 100% free, with no login, no watermarks and no usage limits. Every export is clean and ready to print or share.
Can I print or export a Sudoku I created?
Yes — pick PNG, SVG, JPG or PDF in the Format section and click Download / Print. The export is crisp at any paper size, with the solution included for the PDF option.
Can I share my custom Sudoku with friends?
Yes — click Share Link to copy a URL that loads your exact board. Recipients open the link in any browser and the puzzle loads ready to solve.
Will my work be saved if I refresh the page?
Yes. Each (grid type, input mode) pair has its own auto-save in your browser, so refreshing, closing the tab or coming back the next day never loses your work.
How is uniqueness detected?
We run the current board through our Rust-powered WASM solver. If exactly one solution exists the board is marked unique; otherwise we report the number of solutions or 'no solution'.
How is difficulty calculated?
We feed the board into the same WASM engine that rates generated puzzles (based on solving techniques required). Samurai uses the highest sub-grid difficulty as a rough indicator.
