Privacy Policy

Effective Date: 07-01-2026
Last Updated: 07-02-2026

Welcome to PlaySudoku.org (“we,” “us,” “our,” or the “Site”). This Privacy Policy explains what information we collect when you visit our website, how we use it, and the choices you have. By using PlaySudoku.org, you agree to the practices described below.

If you have questions about this policy, contact us at [email protected].

1. Information We Collect

Puzzle and progress data. PlaySudoku.org’s Sudoku game runs entirely in your browser. Your game progress, difficulty settings, and XP/rank data are stored locally on your device (using your browser’s local storage) and are not transmitted to or stored on our servers.

Automatically collected data. Like most websites, our servers and third-party service providers (described below) may automatically log standard technical information when you visit, including:

IP address (used only in anonymized or aggregated form by our analytics/advertising partners)
Browser type and version
Device type and operating system
Pages visited, time spent on the Site, and referring URLs
General location (city/country level, inferred from IP address)

Information you provide voluntarily. If you contact us through our support/contact form, we collect the information you submit, such as your name, email address, and message content, solely to respond to your inquiry.

We do not require account registration to play Sudoku on this Site, and we do not knowingly collect sensitive personal information.

2. Cookies and Similar Technologies

We use cookies and similar tracking technologies (such as local storage and pixels) to:

Remember your game preferences and settings
Understand how visitors use the Site (analytics)
Serve and measure advertising (see Section 3)

You can control or disable cookies through your browser settings at any time. Disabling cookies may affect certain features of the Site, such as saved game progress.

3. Advertising — Google AdSense

We use, or intend to use, Google AdSense to display advertising on this Site. Google, as a third-party vendor, uses cookies (including the DoubleClick DART cookie) to serve ads based on your prior visits to this Site and other websites on the Internet.

Google’s use of advertising cookies enables it and its partners to serve ads based on your visit to this Site and/or other sites.
You may opt out of personalized advertising by visiting Google Ads Settings.
You may also opt out of a third-party vendor’s use of cookies for personalized advertising by visiting www.aboutads.info/choices.
For more information on how Google uses data when you use our Site, see Google’s Privacy & Terms.

We do not control the data collection or cookie practices of Google or other third-party advertising networks. Their use of your information is governed by their own privacy policies.

4. Analytics

We may use analytics services (such as Google Analytics or Cloudflare Web Analytics) to understand how visitors use the Site so we can improve it. These services may collect information such as pages viewed, session duration, and device/browser type. This data is used in aggregate and is not used to personally identify you.

5. Third-Party Services

Our Site may use third-party plugins or embedded content, including:

Translation services (e.g., Prisna GWT) to provide multilingual support. These services may load resources from third-party servers.
Embedded video (e.g., YouTube) on certain instructional pages, which may set their own cookies in accordance with their privacy policies.

We encourage you to review the privacy policies of these third-party providers, as we do not control their data practices.

6. Children’s Privacy

PlaySudoku.org is a general-audience website and is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. If we become aware that a child under 13 has provided us with personal information, we will take steps to delete it. If you believe a child has provided us with personal information, please contact us at [email protected].

7. Data Retention

We do not store your gameplay data on our servers — it remains on your device via local browser storage until you clear it. Contact form submissions are retained only as long as necessary to respond to and resolve your inquiry.

8. Your Rights and Choices

Depending on your location, you may have rights under applicable data protection laws (such as the GDPR or CCPA), including the right to:

Request access to personal information we hold about you
Request correction or deletion of your personal information
Opt out of the sale or sharing of personal information (we do not sell personal information)
Withdraw consent to cookies at any time via your browser settings

To exercise any of these rights, contact us at [email protected].

9. Data Security

We take reasonable measures to protect the limited information we do collect. However, no method of transmission over the Internet or electronic storage is 100% secure, and we cannot guarantee absolute security.

10. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or for legal/regulatory reasons. Any changes will be posted on this page with an updated “Last Updated” date. We encourage you to review this page periodically.

11. Contact Us

If you have any questions about this Privacy Policy or our data practices, please contact us at:

Email: [email protected]
Website: https://www.playsudoku.org