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PiiBlock

Privacy Policy

Last updated: February 26, 2026

PrivacyShield processes all data locally in your browser. We do not collect, transmit, or store any personal data on any server.

1. Data We Collect

We collect NO personal data. Specifically:

  • We do not collect your prompts or AI conversations
  • We do not collect the PII our extension detects
  • We do not collect your browsing history
  • We do not collect usage analytics that identify you
  • We do not have servers that receive your data

2. Local Data Storage

The following data is stored LOCALLY on your device only and never transmitted anywhere:

  • Extension settings — on/off toggle, detection preferences
  • Encrypted PII mappings — AES-256-GCM encrypted, auto-expiring after 4 hours, purged on browser close
  • Personal PII dictionary entries — detection hints you have manually saved
  • Anonymous aggregate statistics — e.g., "12 items detected today" — no PII values stored

This data never leaves your browser. It is stored in Chrome's local storage and IndexedDB.

3. Encryption

All PII mappings are encrypted using AES-256-GCM via the Web Crypto API. Encryption keys are ephemeral — generated in memory, marked non-extractable, and permanently lost when the browser closes. No keys are ever written to disk or sent anywhere.

4. Third-Party Services

None. PrivacyShield uses zero third-party analytics, tracking, advertising, or data collection services of any kind.

5. Data Sharing

We do not share any data. There is no data to share.

6. Chrome Web Store Compliance

PrivacyShield adheres to the Chrome Web Store User Data Policy and its Limited Use requirements. Our use of data obtained through Chrome APIs is limited to providing and improving the extension's core functionality.

7. Permissions We Request

Below are the browser permissions PrivacyShield requests, and why each is necessary:

  • storage — Stores settings and encrypted mappings locally on your device
  • contextMenus — Adds the right-click "Mask with PrivacyShield" option
  • activeTab — Reads the current tab to detect PII (only on supported AI sites)
  • Host permissions (chatgpt.com, claude.ai) — Injects the content script on supported sites only

8. Children's Privacy

PrivacyShield does not knowingly collect any information from children under the age of 13. If you believe a child has used the extension in a way that raises privacy concerns, please contact us.

9. Changes to This Policy

If we make material changes to this policy, we will post the updated version at this URL and update the "Last updated" date at the top. We encourage you to review this page periodically.

10. Contact

Questions or concerns about this privacy policy? Reach us at support@piiblock.com.