---
title: "Free Printable Sudoku Generator — Easy to Expert, with Solutions | PuzzleBindery"
description: "Generate free printable sudoku puzzles: 9×9 classic plus 4×4 and 6×6 kids grids, four graded difficulties, every puzzle verified to have exactly one solution. PDF with answer key."
canonical_url: "https://puzzlebindery.com/sudoku-maker"
source: "PuzzleBindery"
---
# Free Printable Sudoku Generator

Print a fresh sudoku in seconds — classic 9×9, or kid-friendly 4×4 and 6×6 grids — in four honest difficulty grades. Every single puzzle is mathematically verified to have **exactly one solution**, and the answer key comes with the PDF.

## Difficulty that means something

-   **Easy** — solvable with singles alone; a relaxed coffee-break grid.
-   **Medium** — a comfortable step up for everyday solvers.
-   **Hard & Expert** — fewer givens, real techniques required.
-   **4×4 and 6×6 kids grids** — the classic rules at a size young solvers can finish.

Many free sudoku sites print puzzles with multiple solutions or mislabelled difficulty. PuzzleBindery generates each grid, then digs clues while re-verifying uniqueness at every step — the same engine used for published puzzle books.

## Need 200 sudoku, not one?

The PuzzleBindery Book Studio batch-generates whole graded collections — for example 200 puzzles from Easy to Expert, four per page, with a compact solutions section — and exports a print-ready interior PDF for Amazon KDP. It's a [one-time purchase](https://puzzlebindery.com/#pricing), not another subscription.

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