Maskr Chrome Extension Blocks Sensitive Data Before It Reaches AI Chatbots

Summary

Maskr is a Chrome extension designed to stop personal information and secrets from reaching AI chatbots. It checks prompts on the user’s device and says it uses no servers, accounts, analytics, ads, or tracking; history and settings remain in browser extension storage and can be erased. The extension verifies Indian identity and banking details such as Aadhaar, PAN, GSTIN, UPI IDs, and IFSC codes, and detects API keys, access tokens, private keys, passwords, database connection strings, email addresses, phone numbers, and card numbers. A small AI model running inside the extension identifies names, home addresses, dates of birth, and health details, while attempting to ignore harmless look-alikes such as examples and meeting IDs. High-risk findings block the prompt, other personal data triggers a warning, and a “Mask & send” action replaces sensitive portions with placeholders before checking the masked prompt again. Maskr works with ChatGPT, Claude, Gemini, and Copilot, and lets users add other AI sites, including locally run chat applications, with Chrome permission for each site. Users can pause it temporarily, review an on-device alert history without the captured data itself, set per-site or global rules, and test prompts. The listing describes the extension as free with no daily limits.