Privacy Policy

1. Overview & Commitment to Privacy

Welcome to PayFeeCalc Suite (operated at luoyunxiao.com, referred to as "we", "us", or "our"). We are committed to safeguarding the privacy of our visitors. Our suite of web tools—including the Payment Fee Calculator, QR Studio, Time Zone Converter, IP & Privacy Checker, and Image Compressor—is engineered from the ground up to minimize data collection and execute operations locally inside your web browser whenever technically possible.

2. Client-Side Processing Architecture

We do not store, log, or transmit your calculation inputs, uploaded images, or generated QR data to private backends:

• Payment Fee Calculations: Calculations (e.g., Stripe, PayPal, Wise payout amounts) are processed client-side via JavaScript. Your financial values never leave your device.
• Image Compression: Image transformations are handled strictly within your browser using Canvas APIs. No original or compressed images are uploaded to any external server.
• QR Code Generation: QR codes are created locally via SVG/Canvas rendering.
• Network & IP Tools: Diagnostic queries (e.g., WebRTC checks, DNS resolver queries) make direct network calls from your browser to public endpoints to measure connectivity parameters.

3. Google AdSense & Third-Party Advertising

We partner with Google AdSense to display advertisements across our website. Google and other third-party vendors use cookies to serve ads based on your prior visits to this website and other websites across the Internet.

4. Cookies and Web Beacons

A cookie is a small text file placed on your device. We use cookies and similar tracking technologies to:

• Remember interface preferences (e.g., currency selections or dark/light modes).
• Deliver relevant, non-intrusive advertisements through Google AdSense.
• Analyze high-level traffic metrics and monitor site stability.

You can configure your browser to decline cookies or notify you when cookies are being sent. Note that certain interactive elements may rely on local storage for persistence.

5. Affiliate Marketing Disclosure

Our website participates in select affiliate partner programs (e.g., Wise, NordVPN). This means that if you click on certain referral links or promotional banners and subsequently make a purchase or register an account, we may receive a referral commission at no extra cost to you. Such affiliate partnerships help support server costs and ongoing feature development while keeping all calculators 100% free to the public.

6. GDPR Compliance (For European Economic Area Users)

If you are a resident of the European Economic Area (EEA), you possess statutory rights under the General Data Protection Regulation (GDPR), including:

• The right to access, rectify, or request erasure of any personal information we hold.
• The right to restrict or object to the processing of your personal data.
• The right to withdraw cookie consent at any time without affecting lawful prior processing.

7. CCPA / CPRA Notice (For California Residents)

Under the California Consumer Privacy Act (CCPA) and the California Privacy Rights Act (CPRA), California residents are entitled to know the categories of personal data collected, request deletion, and opt out of the "sale" or "sharing" of personal data for cross-context behavioral advertising. We do not sell personal information for monetary consideration.

8. Children's Privacy (COPPA)

Our service is designed for general audiences and professionals; it is not directed to children under 13 years of age. We do not knowingly collect personal information from children under 13. If you believe that a minor has provided us with personal information, please contact us immediately.

9. Updates to This Policy

We may update this Privacy Policy periodically to reflect technological changes, regulatory updates, or feature additions. Any revisions will be published here with an updated "Effective Date".