LeakGuard

Quietly flag sensitive data on webpages with local detection and private DLP policies.

LeakGuard is a private browser DLP extension that helps prevent accidental data leaks while you type or paste into websites. It works directly inside the browser and quietly flags sensitive content in inputs, textareas, and rich editors before it is submitted. LeakGuard is designed for modern AI and web workflows, including tools like ChatGPT and Gemini, while also working on regular websites and forms. What LeakGuard helps detect: Personal contact data such as email addresses and phone numbers Secrets such as API keys, tokens, and credentials Financial identifiers such as account or card-like numbers PHI-style patterns such as date of birth, MRN, patient ID, member ID, policy number, and claim number Key features: Real-time inline detection while typing or pasting Quiet browser-native warning style with no large intrusive popup Local detection in the browser Review-before-submit support Works across normal inputs, textareas, and contenteditable editors Built-in policy behavior with no end-user setup required Who it is for: Developers using AI tools Teams worried about prompt leaks Anyone who wants an extra layer of protection before sensitive text leaves the browser LeakGuard is designed to be lightweight, simple, and automatic: install the extension open a webpage start typing or pasting LeakGuard works in the background Suggested category Privacy & Security Suggested single-purpose statement LeakGuard detects and flags sensitive data in browser input fields before users submit or paste it to websites.