Sudoku Generator
How to Create Your Sudoku
Kids (4×4, 6×6) or seniors (9×9)
Easy (65% filled) to hard (35% filled)
Play with hints or download PDF
Free Sudoku generator for kids, seniors and classrooms
Create a fresh Sudoku in seconds: 4×4 and 6×6 grids for children, the classic 9×9 grid for adults and seniors. Choose easy, medium or hard and the generator builds a new puzzle with exactly one solution.
Play right here in the browser or print it. The PDF fits A4, uses large, clear digits and can include the answer key on a second page.
Three sizes
4×4 with 2×2 boxes and 6×6 with 2×3 boxes are ideal first steps; 9×9 is the classic newspaper Sudoku.
Three difficulty levels
Easy starts with about 65% of the cells filled, medium with 50% and hard with 35%.
Always solvable
Every puzzle is checked for a unique solution before you see it, so logic alone gets you there.
Explained hints
Stuck? A hint shows the next logical step and explains why it works, instead of just revealing a number.
Notes and undo
Pencil in candidates with note mode, undo mistakes and see conflicting numbers right away.
Print with answer key
Open the print preview, decide whether to add the solution page, then print or save the PDF.
Frequently asked questions
Is the Sudoku generator really free?
Yes. Creating, playing and printing are free and work without an account or download.
Which Sudoku size suits children?
Start with 4×4 on easy. Once the row, column and box rule feels natural, move on to 6×6 and later to 9×9.
Does every puzzle have only one solution?
Yes. The generator removes numbers only as long as the puzzle still has exactly one solution.
Can I print Sudoku puzzles with the answers?
Yes. In the print preview you can switch the answer key on or off. It is added as a separate page.