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Sudoku Generator
Generate printable Sudoku puzzles with customizable difficulty and grid size. Free to use, no sign-ups required.
✅ All generated puzzles are random and guaranteed to have a valid solution.
How to Use This Sudoku Generator
- Choose grid size: Select between 4×4 (beginner-friendly) or classic 9×9 Sudoku puzzles. This tool is completely free to use.
- Select difficulty: Choose Easy, Medium, or Hard based on your skill level. Higher difficulty means fewer pre-filled numbers.
- Customize color: Pick from 8 preset colors or use the advanced color picker to select any custom color for your puzzle.
- Generate puzzles: Click "Generate New Puzzle" to create a fresh puzzle with your settings.
- Download PDF: Choose how many puzzles (1, 5, or 10) and paper size (Letter or A4), then download as PDF.
- Print and solve: Each puzzle is unique and guaranteed to have a valid solution. Perfect for entertainment or brain training!
About Sudoku
Sudoku is a logic-based number puzzle that challenges your problem-solving skills. The goal is to fill the grid so that:
- Each row contains all numbers (1-4 for 4×4, 1-9 for 9×9) without repetition
- Each column contains all numbers without repetition
- Each box (2×2 for 4×4, 3×3 for 9×9) contains all numbers without repetition
The 4×4 variant is perfect for beginners and children, while the classic 9×9 grid offers a more challenging experience. Every puzzle generated has exactly one solution.
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Two Grid Sizes
4×4 for beginners, 9×9 for experts
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Customizable Colors
8 presets + custom color picker
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PDF Export
Download 1, 5, or 10 puzzles instantly