LeakGuard

About

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.