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- 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 solver
Type or paste a Sudoku and get the solution at once, with a check for puzzles that have several answers.
- Free
- No sign-up
- Works on any device
About Sudoku solver
Type or paste your 9 by 9 puzzle with zeros or dots for empty cells and get the full solution at once. It also checks whether the puzzle has more than one answer, which a well-made Sudoku must not have, and flags puzzles with conflicting digits.
How to use Sudoku solver
- 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
Why does it say no solution?
A digit was probably entered twice in a row, column or 3 by 3 box, or a clue was mistyped. Compare the grid with your puzzle and fix any wrong cell.
Is Sudoku solver free?
Yes. Sudoku solver 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.