Do all puzzles have a unique solution?

Yes. Every generated sudoku has exactly one valid solution that can be reached by pure logic — no guessing required.

What grid sizes and clue counts are available?

4×4 (11/9/7/5 clues), 6×6 (24/20/15/11), and 9×9 (45/36/28/20) for Easy/Medium/Hard/Expert. One difficulty applies to each generated batch.

Can I print multiple sudoku per page?

Yes — pick 1, 2, 4, 6, or 9 puzzles per page. Use 1 per page for large-print, 9 per page for compact classroom centers.

Can I create a full sudoku puzzle book?

Yes — generate up to 100 pages at once and download a print-ready PDF with a full answer key.

Are the puzzles suitable for kids?

Yes — start with 4×4 Easy and 1 puzzle per page. Sudoku builds logical thinking, focus, and number sense.

Does it work on mobile, iPad, and Chromebook?

Yes. The sudoku generator runs in your browser — no app required.

Is this worksheet maker really free to use?

Yes — start without a credit card. Manual mode is always free to use and does not spend AI word credits. On the free plan you get 5,000 lifetime AI words (one trial per network), up to 10 PDF downloads per day, and a subtle eduzuma.com watermark on exports. Basic, Pro, and School plans remove the watermark, lift daily limits, and include a commercial resale license.

Do my PDF downloads have a watermark?

Free-plan and guest PDFs include a small eduzuma.com footer watermark. Paid plans (Basic, Pro, School) deliver 100% watermark-free PDFs — the upgrade most teachers and KDP publishers choose.

Is there a daily download limit?

Free and guest users can download up to 10 PDFs per day (tracked in the app). Paid plans include unlimited daily downloads.

Can I sell worksheets or puzzle books commercially?

Classroom and personal use are included on the free plan. Selling on Teachers Pay Teachers, Amazon KDP, Etsy, or similar requires Basic, Pro, or School — each includes a royalty-free commercial license and watermark-free PDFs.

Can I download multi-page worksheet packs on the free plan?

The free plan exports one page per generation. Basic supports up to 5 pages per click; Pro and School support unlimited multi-page packs — ideal for workbook sets, puzzle books, and full classroom packets.

Dashboard

Sudoku

Puzzles

Printable sudoku puzzles with varying difficulty.

Free Sudoku Generator — Printable Sudoku Puzzles Easy to Expert

Free online sudoku generator with easy, medium, hard, and expert puzzles. Printable PDF sudoku books with answer key — free to start; watermark-free PDFs on paid plans.

Free to StartNo Sign-UpEasy to ExpertPDF + PNGA4 & US Letter

Sudoku

Show answers

Generating Sudoku puzzles...

Free Sudoku Generator — Printable Sudoku Puzzles Easy to Expert

Generate unlimited custom sudoku puzzles in seconds. Choose 4×4, 6×6, or 9×9 grids with Easy, Medium, Hard, or Expert difficulty — perfect for classrooms, brain training, daily practice, and puzzle books. Every sudoku has exactly one solution, printable as PDF with a matching answer key.

4×4, 6×6 & 9×9 Grids

Kids 4×4, intermediate 6×6, and classic 9×9 — each with four difficulty levels.

Unique-Solution Sudoku

Every puzzle is guaranteed to have exactly one logical solution — no guessing needed.

Print-Ready PDF Books

Up to 100 pages with 1, 2, 4, 6, or 9 puzzles per page and a matching answer key.

How to make a printable sudoku puzzle in 6 simple steps

From blank page to printable worksheet in under a minute.

1
Pick grid size
4×4 (Kids), 6×6, or classic 9×9.
2
Pick a difficulty
Easy, Medium, Hard, or Expert — one level applies to the whole batch.
3
Set pages & layout
Up to 100 pages with 1, 2, 4, 6, or 9 puzzles per page.
4
Customize style
Tune title, instructions, fonts, and border thickness.
5
Preview the puzzle
Toggle the answer key to verify difficulty and solvability.
6
Download from the menu
Use the Download menu for puzzle PDF, solution PDF, both, or PNG — A4 or US Letter.

Everything you need in a sudoku puzzle generator

4 difficulty levels

Up to 100 pages

Unique solution guaranteed

PDF + PNG export

Matching answer key

4×4, 6×6, 9×9 grids

A4 & US Letter

Free to start; watermark-free on paid

Single puzzle mode

Quick warm-up or daily brain training
Choose any difficulty
Large-print layout option
Re-generate for a brand-new puzzle in one click

Puzzle book mode

Generate up to 100 pages at once
One difficulty per batch — regenerate for variety
Perfect for gift books, classroom centers, retirement homes
Full answer key included

Who uses our sudoku generator?

Teachers

Math centers, logic warm-ups, early-finisher activities.

Homeschool parents

Logical thinking and number practice.

Puzzle book creators

Self-publish sudoku books with one click.

Senior centers

Daily large-print brain training.

Sudoku enthusiasts

Endless easy-to-expert puzzles.

Travel & airline kits

Printable puzzle packs for kids and adults.

Commercial Use Allowed

Members

If you have an active membership plan, you may use the generated worksheets and puzzles for commercial purposes — including selling them to end users on Etsy, Amazon KDP, TPT (Teachers Pay Teachers), WooCommerce & more.

Free plan: personal & classroom use with a subtle PDF watermark. Paid plans (Basic, Pro, School) unlock watermark-free exports and royalty-free resale on TPT, KDP, Etsy & more.