Sudoku Generator

How the sudoku generator works

Every time you press generate, the tool builds a brand-new set of puzzles in your browser. It first fills a complete grid with a valid solution, then removes numbers one by one, re-solving after each removal to confirm that exactly one answer remains. That is why every printable sudoku here can be finished with logic alone — you never need to guess.

Nothing is uploaded and nothing is stored, so you can make as many puzzle packs as you like. Print the sheets straight from your browser or download them as a PDF to keep, email, or share with a class.

Grid sizes and difficulty levels

• 4×4 mini sudoku: numbers 1–4 in 2×2 boxes — the easiest way for young children to learn the rules.
• 6×6 kids sudoku: numbers 1–6 in 2×3 boxes, a natural step up from the mini grid.
• 9×9 classic sudoku: the standard grid with 3×3 boxes, in easy, medium, hard and expert.
• Answer keys: every pack can include a matching solution sheet for quick checking.

Printing tips for clean worksheets

• One puzzle per page gives the largest grid, ideal for pencil notes and erasing.
• Two or four puzzles per page saves paper for classroom sets and puzzle books.
• Choose a font that suits your readers — a rounded font works well for younger kids.
• Download the PDF if you want to print the same pack again later.

Are these printable sudoku puzzles really free?

Yes. You can generate, print, and download as many sudoku packs as you want, free for home and classroom use. There is no account and no watermark.

Do the printable sudoku sheets include answers?

Yes. Turn on answer keys and the generator adds a matching solution sheet after the puzzle pages, so you can check work in seconds.

Which difficulty should I choose?

Easy puzzles leave more numbers on the grid and suit beginners and children. Medium and hard need candidate notes, and expert puzzles are for experienced solvers.