Free Sudoku Generator

Create Printable Sudoku Puzzles in Seconds — 100% Free

ClassPrint's sudoku maker generates print-ready sudoku puzzles in Easy, Medium, Hard, or a Mixed pack of all three. Every puzzle downloads as a PDF with a full solved answer key — no app to install, no ads.

Every puzzle pack includes a full answer key

No more solving your own sudoku to check the answers. Every ClassPrint sudoku download includes a matching fully-solved answer key page — so grading or self-checking takes seconds.

Easy, Medium, Hard — or Mixed for a bit of everything

Beginners can start with Easy sudoku, work up to Medium, and challenge themselves with Hard puzzles once they're ready. Or generate a Mixed pack that cycles through all three difficulty levels in one book — perfect for a classroom with mixed skill levels or a puzzle book that grows harder page by page.

Printable sudoku for kids and the classroom

Sudoku is a brilliant first logic puzzle for kids — it builds concentration, pattern-spotting, and step-by-step reasoning, and despite the numbers there's no arithmetic involved at all. Easy puzzles start with about half the grid already filled in, giving younger solvers enough footholds to finish without frustration. Teachers print sudoku worksheets as early-finisher activities, quiet-time tasks, and brain-break challenges — generate a whole class set as one PDF and mark it in seconds with the included answer key.

Free printable sudoku puzzles, no app required

No downloads, no ads, no in-app purchases — just a print-ready PDF you generate and print. Great for classrooms, waiting rooms, travel activity packs, or anyone who prefers pencil and paper over a screen.

Built for teachers, tutors, and puzzle lovers at home

Whether you're printing a logic-puzzle warm-up for class, a tutoring session, or just want a fresh sudoku book for the weekend, ClassPrint gives you a print-ready PDF in seconds — no design software, no subscriptions to try it.

Is this sudoku generator really free?

Yes. You can download a free sample sudoku puzzle with no signup required, and every new ClassPrint account gets 15 free tokens to generate your own puzzles — no card required.

What sudoku difficulty levels can I choose?

ClassPrint's Sudoku generator supports Easy, Medium and Hard difficulty, or a Mixed pack that combines all three levels in one puzzle book.

Can I print the sudoku puzzles I make?

Yes. Every sudoku pack downloads as a print-ready PDF in Letter or A4 size, complete with a full solved answer key — just print and hand out.

How many sudoku puzzles are in each pack?

You choose the page count when you generate — anywhere from a single puzzle to a full multi-page book, each with its own answer key page.

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