PII Blocker - Mask Sensitive Data from AI Chatbots

Stop data leaks to ChatGPT, Claude & Gemini. Detects and masks names, cards, medical info & more. 100% local processing.

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 like credit cards, SSNs, and API keys is auto-protected 5. The AI responds with placeholders, and PiiBlocker shows you the real data 6. Missed something? Select any text and right-click to mask it manually WHAT IT DETECTS (15+ TYPES) Credit card numbers with validation, Social Security numbers, API keys and secrets (OpenAI, AWS, GitHub, and more), passwords, names, addresses, phone numbers, emails, dates of birth, ages, salaries, medical conditions, bank account numbers, UK National Insurance numbers, and more. 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 and regex patterns. Auto-masking for critical data. Manual masking via right-click context menu. Response unmasking with placeholders swapped back seamlessly. Personal PII dictionary that learns your specific data. Works on ChatGPT, Claude, and Gemini. Stays protected on long-running tabs. FREE CORE PROTECTION Core PII detection and masking is free. 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/piiblocker