Terms of Service

Last Updated: April 2026

Welcome to solve-sudoku.io. By accessing and using our website and services, you agree to comply with and be bound by the following terms and conditions. Please read these terms carefully before using our Sudoku solving tool.

1. Acceptance of Terms

By accessing or using Sudoku Solver ("the Service"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, please do not use the Service.

2. Description of Service

solve-sudoku.io provides a free online tool for solving and generating Sudoku puzzles. The Service includes:

• An interactive Sudoku grid for entering and solving puzzles
• Automatic puzzle solving using backtracking algorithms
• Step-by-step human-style solving with explanations
• Puzzle generation at various difficulty levels
• Educational content about Sudoku solving techniques
• Pencil mark and candidate management features

3. Use of Service

3.1 Permitted Use

You may use the Service for:

• Personal entertainment and puzzle solving
• Educational purposes and learning Sudoku techniques
• Generating practice puzzles
• Sharing puzzles with friends and family

3.2 Prohibited Use

You agree NOT to:

• Use the Service for cheating in competitions, contests, or academic assignments
• Attempt to reverse engineer, decompile, or extract the source code
• Use automated systems (bots, scrapers) to access the Service excessively
• Attempt to interfere with or disrupt the Service
• Use the Service for any illegal or unauthorized purpose
• Redistribute or sell the Service or its content
• Remove or modify any copyright notices or attributions

4. Intellectual Property

The Service, including its design, code, algorithms, text, graphics, and other content, is owned by solve-sudoku.io or its licensors and is protected by copyright and other intellectual property laws.

Puzzles you create or solve using the Service remain available for your personal use. We do not claim ownership of puzzles you enter into the system.

5. Disclaimer of Warranties

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO:

• Warranties of merchantability or fitness for a particular purpose
• Warranties that the Service will be uninterrupted, error-free, or secure
• Warranties regarding the accuracy or reliability of puzzle solutions

We strive to provide accurate puzzle solutions, but we do not guarantee that all puzzles will be solved correctly in every case. Users should verify solutions independently when accuracy is critical.

6. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, SOLVE-SUDOKU.IO SHALL NOT BE LIABLE FOR:

• Any indirect, incidental, special, consequential, or punitive damages
• Any loss of profits, data, or goodwill
• Any damages resulting from your use or inability to use the Service
• Any damages resulting from reliance on information provided by the Service

Some jurisdictions do not allow the exclusion of certain warranties or limitations of liability, so some of the above limitations may not apply to you.

7. No Account Required

Our Service does not require user accounts or registration. As such, we do not collect or store personal login information. See our Privacy Policy for more details on data handling.

8. Third-Party Links

The Service may contain links to third-party websites for educational or reference purposes. We are not responsible for the content, privacy policies, or practices of third-party sites. Accessing third-party websites is at your own risk.

9. Modifications to the Service

We reserve the right to:

• Modify, suspend, or discontinue any part of the Service at any time
• Update features, algorithms, or content
• Impose limits on certain features or restrict access to parts of the Service

We will make reasonable efforts to notify users of significant changes.

10. Changes to Terms

We may revise these Terms at any time by updating this page. Changes become effective when posted. Your continued use of the Service after changes constitutes acceptance of the revised Terms. We encourage you to review these Terms periodically.

11. Termination

We may terminate or suspend your access to the Service immediately, without prior notice, if you breach these Terms or engage in prohibited activities.

You may stop using the Service at any time. Since no account is required, there is no formal termination process.

12. Governing Law

These Terms shall be governed by and construed in accordance with applicable laws, without regard to conflict of law principles. Any disputes arising from these Terms or your use of the Service shall be resolved in appropriate courts.

13. Severability

If any provision of these Terms is found to be unenforceable or invalid, that provision shall be limited or eliminated to the minimum extent necessary so that the remaining Terms remain in full force and effect.

14. Entire Agreement

These Terms, along with our Privacy Policy, constitute the entire agreement between you and solve-sudoku.io regarding the use of the Service.

15. Fair Use and Academic Integrity

While our Service is an excellent learning tool, we encourage ethical use:

• If you're solving puzzles for academic credit, check with your instructor before using solver tools
• Competition rules often prohibit solver tools - always follow competition guidelines
• Use the "Human Solve" feature to learn techniques rather than just getting answers
• Practice solving puzzles yourself to develop your skills

16. Age Restrictions

There are no age restrictions for using our Service. The content is appropriate for all ages, and we do not collect personal information. However, children under 13 should use the Service under parental supervision.

17. Contact Information

If you have questions about these Terms of Service, please visit our Contact page.

18. Acknowledgment

By using solve-sudoku.io, you acknowledge that you have read, understood, and agree to be bound by these Terms of Service and our Privacy Policy.