Sudoku Generator - Free Printable Sudoku Puzzles Online
Sudoku Generator
A New Puzzle, Every Time
Click "New Puzzle" to generate a Sudoku.
Understanding This Generator
Guaranteed Unique Solution
Every generated puzzle is verified to have exactly one valid solution — cells are only removed from a completed grid when a solver confirms no alternative solution exists.
Difficulty by Clue Count
Easy puzzles keep more starting numbers (clues) visible; Hard puzzles remove more, requiring deeper deduction.
Print-Friendly
Use the Print button for a clean, ink-friendly puzzle grid without the rest of the page.
Local Processing
Every puzzle is generated entirely in your browser — nothing is sent to a server.
Sudoku Rules
Fill the 9×9 grid so that every row, every column, and each of the nine 3×3 boxes contains the digits 1 through 9 exactly once. The blue numbers are your starting clues and can't be changed; work out the rest through logic and elimination.
Key Takeaways
- No Guessing Required: A properly constructed Sudoku, like every puzzle here, can always be solved through pure logic.
- Stuck? Reveal It: Click "Reveal Solution" any time to see the completed grid.
- Client-Side Only: Puzzle generation and solving both happen locally in your browser.