A fresh, valid puzzle every time you click.
Free Printable Sudoku
Sudoku is the number placement puzzle where every row, column, and three by three box must contain the digits one through nine exactly once. PrintNook generates a brand new, fully valid puzzle each time, then lets you download it as a clean PDF with the solution on a second page. Choose a difficulty from easy to expert, print a stack for the train or the classroom, and never buy another puzzle book.
What sudoku is good for
Daily brain training
A puzzle a day keeps logical reasoning sharp. Easy grids warm you up; expert grids demand careful chains of deduction.
Classroom activities
Print a set at graded difficulties for early finishers or logic lessons. Each sheet includes an answer key for quick checking.
Screen free downtime
Keep a few printed puzzles in a bag for waiting rooms, flights, and quiet evenings away from a phone.
Print at 100 percent. Turn off Fit to page in your print dialog so the layout keeps its true measurements. See our print settings guide for the full checklist.
Frequently asked questions
Are the puzzles guaranteed to be solvable?
Yes. Every puzzle is built from a complete, valid solution grid, so each one can be finished with logic alone. The solution is included on the second page.
How do the difficulty levels differ?
Harder levels reveal fewer starting numbers and require longer chains of reasoning. Easy grids give more clues so beginners can build momentum.
Related printables
Made with PrintNook. All printables are free to use and print.