Sudoku Generator
Generate a clean, correctly-constructed 9×9 sudoku puzzle with a complete solution — the same print-ready quality that goes into our paid sudoku books.
No signup · No credit card · Instant results
Valid, single-solution
Every grid is a properly constructed puzzle with exactly one solution — no broken or ambiguous boards.
Solution included
A full answer grid comes with each puzzle, ready for the back of a book.
Clean & legible
High-contrast grid built for print legibility, not a cramped screenshot.
How it works
Open the studio
No account, no card — just tap generate.
Generate a grid
A valid 9×9 sudoku is built instantly with a single guaranteed solution.
Get the solution
The full answer grid is included. Print it, or build a whole sudoku book next.
Correctly constructed, every time
A sudoku that can’t be solved — or has multiple solutions — is worthless in a book. This generator produces properly constrained, single-solution grids with a matching answer key, the same standard we hold our published sudoku titles to.
From one puzzle to a full book
Sudoku books sell in volume — 100+ puzzles across difficulty tiers. When the sample looks right, the full studio generates the entire graded set, a cover, and a print-ready interior.
Frequently Asked Questions
Is the sudoku generator free?+
Yes — free with no signup. Tap generate and a valid 9×9 sudoku puzzle with its full solution appears instantly.
Are the puzzles solvable with one solution?+
Yes. Every grid is properly constructed with exactly one solution — never ambiguous or unsolvable.
Is the answer key included?+
Each puzzle comes with a complete solution grid, ready for the answer section of a book.
Can I make a full sudoku book?+
Yes — the full studio builds a complete sudoku book with graded difficulty tiers, a cover, and a print-ready interior PDF.
Ready for a full puzzle book?
KDP Builder takes you from this free tool to a complete, upload-ready package — manuscript or interior, cover, and metadata.
More Free KDP Tools
Keep prepping your book — every tool below is free and needs no signup.
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Book Title Generator
Generate catchy, marketable book titles for any genre in seconds.
Ready to Build the Whole Book?
Take it further with a complete, Amazon-ready project in KDP Builder.