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 People run their work through AI chats now. Contracts, emails, patient notes, spreadsheets. Everything you paste is stored on someone else's server. PiiBlocker catches personal data before it leaves your browser. Detection and masking run locally. Free mode makes zero network calls, and there is no account and no data collection. Watch the 60-second demo: https://www.youtube.com/watch?v=VpYqkC-_UVg SUPPORTED SITES PiiBlocker works on seven AI chat platforms, all free. The extension can read those seven sites and nothing else. See the screenshots for the full list, or visit https://www.piiblock.com Updating to 1.5.0? Chrome will ask you to re-approve the extension because this version adds four new protected sites. The prompt is expected. Click Enable and protection resumes immediately. The extension shows you the complete site list after updating. HOW IT WORKS 1. Type normally into any supported AI chat 2. PiiBlocker highlights detected personal data in real time 3. Before sending, choose what to mask in a 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, 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 Detection and masking happen in your browser. In free mode your data never leaves your device and the extension makes zero network calls. 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 in the AI's replies. Personal PII dictionary that learns your specific data. Works on all seven supported sites. Self-monitoring on every site, so silent breakage gets caught. Stays protected on long-running tabs. FREE CORE PROTECTION Core detection and masking is free on all supported sites, with no account and no usage limits. SUPPORT Website: https://www.piiblock.com Email: support@piiblock.com GitHub: https://github.com/piiblocker-coder/piiblocker