Printable Sudoku Puzzles
From first-timer 4×4 grids to proper hard 9×9 challenges, every puzzle is generated with a guaranteed single solution. Play it online right on the page with the built-in keypad, or print the PDF with its answer page. A fresh batch is one click away.
First sudoku: 4×4 and 6×6
A 4×4 grid uses the digits 1 to 4 in each row, column and 2×2 box: the whole rule of sudoku with nothing to hold in your head, which makes it the right first puzzle for young kids. The 6×6 grid adds 2×3 boxes and six digits, the step between a first puzzle and the full board. Four puzzles fit on a page, so one sheet covers several days of warm-ups.
Classic 9×9: easy, medium and hard
The standard board. Easy leaves many numbers filled in, so most empty cells have an obvious answer; medium leaves fewer; hard leaves few enough that you work each empty cell out by ruling numbers out across its row, column and box. Two puzzles print per page with the answers on a separate page, and every board can be played on screen with the keypad and the Check button.
FAQ
Are these puzzles guaranteed solvable?
Yes, and more: every puzzle has exactly one solution, so no guessing is ever required.
Can I play sudoku online here for free?
Yes, every sudoku page has a Play online mode with a tap keypad and a Check button that verifies your digits against the unique solution. Digits stay on the device, so a half-finished board is waiting next time. No account, no app, no ads inside the board.
Can I print a big batch for a road trip?
Turn on 5 versions before downloading and each PDF carries five fresh puzzles plus solutions. Repeat with new clicks until the glovebox is full.
Where should a beginner start?
Kids and first-timers start at 4×4, where the rule is visible at a glance. Move to 6×6 once that feels easy, then easy 9×9. The hard 9×9 sheets assume comfortable pencil-mark habits.
Are these real sudoku or random grids?
Real ones: the generator builds a full valid solution, then removes digits symmetrically while checking after every removal that exactly one solution remains.
How many puzzles per page?
9×9 pages carry two puzzles, smaller grids carry four. Solutions for every grid arrive on the final page of the PDF, with filled digits in green.