PiiBlocker — Mask PII in AI Chatbots

Stop data leaks to AI chatbots. Detects and masks personal data before it reaches ChatGPT, Claude, and Gemini. 100% local.

🛡️ STOP DATA LEAKS TO AI CHATBOTS 43% of workers paste sensitive data into ChatGPT without realising it (Source: National Cybersecurity Alliance, 2025-2026). Names, credit cards, medical records once it's sent, it's stored on someone else's server. PiiBlocker catches personal data before it leaves your browser. Everything runs locally. No servers. No data collection. 🎬 Watch the 60-second demo: https://www.youtube.com/watch?v=VpYqkC-_UVg HOW IT WORKS 1. Type normally into ChatGPT, Claude, or Gemini 2. PiiBlocker highlights detected personal data in real-time 3. Before sending, choose what to mask in a simple confirmation dialog 4. Critical data (credit cards, SSNs, API keys) is auto-protected 5. The AI responds with placeholders → PiiBlocker shows you the real data WHAT IT DETECTS (15+ TYPES) Credit card numbers (with validation), Social Security numbers, API keys and secrets (OpenAI, AWS, GitHub, etc.), passwords, names, addresses, phone numbers, emails, dates of birth, ages, salaries, medical conditions, bank account numbers, UK National Insurance numbers, and more. Plus you can manually mask anything we miss with right-click. PRIVACY BY DESIGN - All processing happens locally in your browser - Your data NEVER leaves your device - No servers — we literally don't have any - AES-256 encrypted storage with auto-expiring keys - One-click purge of all stored data FEATURES - Real-time PII detection using NER + regex - Auto-masking for critical data - Manual masking via right-click context menu - Response unmasking — placeholders swapped back seamlessly - Personal PII dictionary — teach it your name, it remembers - Works on ChatGPT, Claude, and Gemini FREE FOREVER No account required. No usage limits. No data collected. SUPPORT Website: https://www.piiblock.com Email: support@piiblock.com GitHub: https://github.com/piiblocker-coder/privacyshield