Terms of use

These terms apply when you use Sudoku Online, a free Sudoku site run by Sudoku Online Editorial Team. By using the site you agree to them. In short: play and learn freely for your own use, and do not abuse, attack or bulk-copy the site.

The site is provided as it is, and the terms may change. They were last updated on 29 October 2026.

Who are we and what do the terms cover?

The site is operated by Sudoku Online Editorial Team and can be reached at [email protected]. The terms cover the website, its games and its written material. They sit alongside the privacy policy and the cookie policy.

What may you do?

Play the games and read the pages for yourself, for free, without an account.
Link to any page, and quote short passages with credit and a link back.
Share your result using the share option in the game.

What may you not do?

Attack, overload or probe the site for weaknesses, or try to reach areas meant for staff.
Use automated tools to copy the site, the puzzle files or the pages in bulk, or to submit large numbers of requests.
Copy the puzzles, lessons, guides, diagrams or code and republish them as your own, or sell them.
Use the site in a way that breaks the law or harms other people.

Who owns the content?

The text, lessons, diagrams, puzzles and design of the site belong to Sudoku Online Editorial Team or are used with permission, and they are protected by copyright. Sudoku as a kind of puzzle is not owned by anyone. Third-party sources are credited where they are used, and their rights stay with their owners.

Is anything guaranteed?

The site and its content are provided as they are and as they are available. We work to make the puzzles correct and the explanations accurate, and we fix errors we confirm, but we do not promise that the site will always be available, error-free or suitable for a particular purpose. The lessons are educational, not professional advice. To the extent the law allows, Sudoku Online Editorial Team is not liable for losses that arise from using the site, and nothing in these terms limits any right you have that the law does not allow to be limited.

What about links, ads and other services?

Pages may link to other sites, and the site may show advertising from third parties. We do not control those sites or advertisements and are not responsible for them. Their own terms and privacy policies apply when you use them.

Can the site or the terms change?

We may change, suspend or remove parts of the site, and we may update these terms. The date at the top shows when they last changed. Continuing to use the site after a change means you accept the updated terms.

Which law applies?

These terms are governed by the law that applies where Sudoku Online Editorial Team is established, and disputes go to the courts that have jurisdiction there, unless the law gives you the right to bring a claim where you live.

How do you contact us?

Write to [email protected] or use the contact page.