Sudoku Generator

Generate and solve Sudoku — Easy, Medium, Hard difficulties

🔒 Files never leave your browser

Click a cell and type 1-9 to fill it. Press Backspace or Delete to clear. Bold numbers are given clues. Click Check to verify your solution, or Solve to auto-fill.

How to Use Sudoku Generator

Generate puzzle

Select difficulty and generate a new puzzle.

Play

Fill in empty cells with numbers 1-9.

Check or solve

Check your solution or auto-solve.

Why Choose AllTools Sudoku Generator?

  • ✓ 100% free, no account needed
  • ✓ 3 difficulty levels
  • ✓ Auto-solve
  • ✓ Solution checker
  • ✓ Styled grid
  • ✓ No data stored or transmitted

Why Use This Tool

  • ★ All processing happens in your browser — nothing is uploaded
  • ★ Completely free with no usage limits
  • ★ No account or registration required
  • ★ Instant results with zero latency
  • ★ Works on any device with a modern browser

Related Resources

Memory game → Random numbers → Typing test →

Frequently Asked Questions

Are the puzzles unique? ▼
Yes. Each puzzle is randomly generated with a unique solution.
Is there a file size limit? ▼
No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.
Which browsers are supported? ▼
All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.
Can I use this offline? ▼
Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.
Is my data secure? ▼
Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.
Does this work on mobile? ▼
Yes. All AllTools tools are fully responsive and work on phones and tablets.

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