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Sether Shield — PII guard for AI chat

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Overview

Catches personal data in your prompt before it reaches ChatGPT, Claude, or Gemini. 100% local — nothing leaves your browser.

Sether Shield catches personal data in your prompt before you send it to an AI. As you type into ChatGPT, Claude, or Gemini, Sether Shield scans your message locally — right in your browser — for things you probably don't want to hand to a third party: email addresses, phone numbers, credit-card and bank numbers, national IDs, API keys and other secrets, and names. When it finds something, a small shield turns orange. One click scrubs the sensitive parts into placeholders like [email-1] before the message ever leaves your computer. 100% local. The extension makes no network calls, has no analytics, and never sends your text anywhere. Its only permission is local storage, used to remember whether it's on. No account, no sign-in. Open source and auditable. Sether Shield is part of Sether, the open-source PII-redaction layer for AI apps. It doesn't replace your company's policies or a lawyer — it's a fast, private guardrail so you stop pasting secrets into AI by accident.

Details

  • Version
    0.2.0
  • Updated
    June 16, 2026
  • Offered by
    emorylebo
  • Size
    426KiB
  • Languages
    English (United States)
  • Developer
    Email
    emorylebo@gmail.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization
The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

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