Puzzle generator
Sudoku Puzzle Generator
Generate a brand new, fully valid sudoku puzzle at the difficulty you choose, then download it as a clean PDF with the solution on page two. Every puzzle is unique and solvable with logic alone.
A fresh puzzle whenever you want one
Sudoku asks you to fill a nine by nine grid so that every row, column, and three by three box contains the digits one to nine exactly once. Instead of buying a book, generate exactly the puzzle you want. Press New puzzle for another grid, switch difficulty for more or fewer starting clues, and print a stack for the week.
Difficulty levels
- Easy reveals plenty of clues, ideal for beginners and quick solves.
- Medium asks for a little scanning and elimination.
- Hard hides more numbers and rewards patient deduction.
- Expert leaves the fewest clues for a serious challenge.
The answer key is included. Every download has the solution printed on the second page, so you can check your work or hand out puzzles with an instant marking sheet.
More printables
Looking for ready-made sheets? The free printable sudoku page has presets and a full guide. Or keep the desk tidy with dot grid paper for notes or a weekly planner for the week ahead.