Privacy Policy

1. Information we collect

1.1 What we don't collect

301check.com does not collect:

• Names, email addresses, phone numbers, or any other personal identifiers
• The URLs you check or their results (nothing is stored server-side)
• Account information (no registration required)
• Payment information (the service is free)

1.2 Anonymous data we may collect

To improve service quality and understand usage patterns, we may collect the following anonymous information:

• Access logs — IP address, browser type, operating system, timestamp
• Usage statistics — page views, check counts, feature usage
• Technical info — screen resolution, language settings, referrer

This data is used only for aggregate analysis and is never linked to any individual.

2. Data storage

2.1 Server-side

Our servers do not persist your check data. Once a request is processed, the data is discarded from memory immediately. We retain only anonymous access logs for security and performance purposes.

2.2 Browser local storage

To improve your experience, we use the browser's localStorage to store the following on your device:

• Check history — your last 10 checks
• Theme preference — dark or light mode

This data never leaves your browser. You can delete it at any time using the "Clear history" button or your browser settings.

3. Cookies

3.1 Essential cookies

• Session cookies — used for rate limiting and abuse prevention
• Theme cookie — remembers your theme preference

3.2 Analytics

We use a privacy-friendly analytics solution configured with IP anonymization, no cross-site tracking, and data stored on our own servers.

3.3 Advertising cookies

We use Google AdSense to display ads that help fund the service. Google may use cookies to serve personalized ads. You can manage your preferences via Google Ad Settings.

4. Third-party services

4.1 Google AdSense

Used for advertising. See Google's Privacy Policy for details.

4.2 Google Fonts

Used for web typography. See Google Fonts Privacy FAQ.

5. Security

• HTTPS encryption — all data in transit is protected by TLS/SSL
• Rate limiting — protects against abuse and DDoS
• Regular updates — server software and security patches kept current
• Data minimization — we only collect what's strictly necessary

6. Your rights

• Deletion — clear your browser's local storage at any time
• Opt-out — disable cookies or use an ad blocker
• Complaints — contact us or your local data protection authority

7. Children's privacy

301check.com is not directed at children under 13. We do not knowingly collect information from minors.

8. Policy updates

We may update this policy from time to time. Significant changes will be announced on the site. We recommend checking this page periodically.

Last updated: February 2026

9. Contact