Privacy Policy

Effective date: July 29, 2026 · Last updated: July 29, 2026 · JSC BIZ, LLC

1. Overview

OpenMahj (openmahj.org) is an informational website for open mahjong standards, published by JSC BIZ, LLC. It has no accounts and no sign-ups, and does not collect personal information about you.

2. Information We Do Not Collect

We do not collect your name, email address, account information, or location, and we do not share data with advertisers or data brokers.

3. Website Analytics

This website uses Google Analytics to understand aggregate traffic patterns (such as pages viewed, general region, and device type). This data is aggregated and does not identify you. Google Analytics sets cookies in your browser; you can opt out at any time via Google’s opt-out browser add-on. The site is also served through Cloudflare, which keeps aggregate traffic and security statistics. We never use this data to identify you or to advertise to you.

4. The Mahjong Master Coach App

OpenMahj is the home of the open Mahjong Portable Format (MJPF). The Mahjong Master Coach app implements that format and is a separate product with its own privacy policy — the app itself collects nothing and runs offline.

5. Children’s Privacy

This site is not directed to children under 13, and we do not knowingly collect personal information from anyone, including children.

6. Your Rights

Depending on your location, you may have rights under GDPR (EU/UK), CCPA (California), or similar privacy laws. Because we collect no personal data, there is no profile to access, correct, or delete. For website analytics, you can opt out using the add-on linked above.

7. Changes to This Policy

We may update this policy from time to time. Material changes will be reflected in the “Last updated” date at the top of this page.

8. Contact

Questions about this privacy policy? Reach us at:
JSC BIZ, LLC
[email protected]
openmahj.org