Toolipedia- Free
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No tool matches your search.
- Free
- No sign-up
- Works on any device
Create a QR code for a link, Wi-Fi, WhatsApp, contact and more, or read one from a photo.
- Free
- No sign-up
- Works on any device
Fill in the details to see your QR code.
PNG for phones, chats and websites. SVG and PDF stay sharp at any size, which is best for printing. Tip: point your phone camera at the preview to test it.
3. Style (optional): colors, dots, logo
Choose a photo or screenshot or drag it here
Works with photos of printed codes, screenshots and image files.
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Sudoku generator
Printable sudoku puzzles from easy to expert, each with one solution, plus answers.
- Free
- No sign-up
- Works on any device
About Sudoku generator
Generates sudoku puzzles with a single valid solution, at levels from easy to expert, and prints them with an answer page. The rule is simple: every row, column and 3 by 3 box must hold the digits 1 to 9 once. Harder puzzles give fewer starting numbers and need more advanced logic.
How to use Sudoku generator
- Set the options above. The result updates live.
- Change anything until it's just right.
- Copy the result or download it.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
Does every puzzle have only one solution?
Yes. Each puzzle is built so exactly one solution fits, which means you never need to guess. The answer sheet shows it.
Is Sudoku generator free?
Yes. Sudoku generator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.