Guard4AI — Local AI Privacy Guard

Masks sensitive data in messages, documents and images before it reaches AI chatbots. Detection runs entirely on your device.

Guard4AI catches sensitive data like client names, bank details, medical information, usernames, passwords, and other private information before it is sent to AI tools like ChatGPT, Claude, Gemini, and more. This stops sensitive information from leaving in the first place, where it would no longer be under the company’s or user’s control. Guard4AI automatically replaces the real details with realistic fake information, so the AI can still understand and respond to the message without ever seeing the real data. When the AI responds, Guard4AI swaps the real details back into the reply on the user’s screen. Guard4AI works for both individuals and companies. For teams, an admin dashboard shows how much sensitive data is being caught, broken down by category and employee, without ever revealing the sensitive information itself. Full privacy policy: https://guard4ai.com/privacy