Mask AI - PII Detection for AI Chatbots

About

Mask AI is the privacy layer between you and ChatGPT, Claude, or Gemini.

Every time you paste a document, an email, a contract, or a customer record into an AI chatbot, you might be sending sensitive personal data to a third party. Mask AI detects that data and lets you replace it with placeholders before sending — all in your browser, with no data uploaded to any server.

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HOW IT WORKS
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1. Type or paste text in ChatGPT, Claude, or Gemini.
2. The Mask AI icon shows the count of detected sensitive items.
3. Click the icon → "Mask & Copy". The masked version is copied to your clipboard.
4. Paste (Ctrl+V / ⌘V) into the chat — your masked, AI-safe text replaces the original.

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WHAT GETS DETECTED
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• People's names (Compromise.js NER)
• Email addresses
• Phone numbers (US, UK, JP, AU, EU formats)
• Social Security Numbers (SSN)
• Credit card numbers (Visa, Mastercard, Amex)
• Bank account numbers, IBAN, routing numbers
• Passport, driver's license, VIN
• Street addresses
• Organizations and place names
• 20+ entity types in total

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PRIVACY-FIRST BY DESIGN
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✓ 100% local — detection runs in your browser via JavaScript
✓ Nothing is uploaded to our servers (verify yourself in DevTools → Network)
✓ No account required, no tracking, no cookies
✓ Open about how it works — full Privacy Policy at https://mask-ai.app/privacy

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WHO IT'S FOR
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• Lawyers redacting client information before AI summarization
• Healthcare workers anonymizing patient notes for HIPAA compliance
• Developers stripping API keys and internal URLs from code snippets
• Compliance officers for GDPR / CCPA workflows
• Anyone who pastes private documents into AI tools

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ALSO AVAILABLE
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The full web tool at https://mask-ai.app offers more control: review every detected item, customize replacements, mask custom terms, export to CSV, and more.

Source code transparency and questions: [email protected]