PseudoShield - Pseudonymize personal data before pasting into AI cats

Free, open source browser extension (Chrome + Firefox) that intercepts Ctrl+V on AI platforms and replaces personal data with deterministic pseudonyms before the text reaches the chat. 35 detection patterns (names, IBANs, national IDs, emails, phones, credit cards) with math validation. Works on ChatGPT, Claude, Gemini, Copilot, DeepSeek, Perplexity. 100% local. Zero network calls, zero tracking. GDPR Art. 30 audit log included. Built for lawyers, DPOs, doctors, and accountants.

Hey Product Hunt! 👋 I'm Jeoffrey, a Belgian lawyer specializing in AI law and GDPR. I built PseudoShield because I saw a real gap: professionals like lawyers, doctors, and DPOs want to use AI chatbots — but can't risk pasting client names, emails, or IDs into them. PseudoShield detects and replaces personal data (names, emails, phone numbers, credit cards) with consistent pseudonyms before anything reaches the AI. It runs 100% locally — no API calls, no tracking, no data ever leaves your browser. What makes it different: - Works on ChatGPT, Claude, Gemini, Copilot, DeepSeek, Perplexity - Math validation for IBANs, credit cards, phone numbers - Built-in GDPR Art. 30 audit log for compliance - Open source — check the code yourself I built this as a lawyer who codes, for professionals who need AI but can't afford a data breach. Would love your feedback! 🙏

PseudoShield - Pseudonymize personal data before pasting into AI cats

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