Privacy Sentinel - PII Blocker Extension

Warns you before you accidentally send personal identifiable information online.

Problem

Users often unknowingly leak PII like phone numbers, ID numbers, or addresses when filling forms, sending emails, or chatting. Existing tools mostly do static scanning and can't prevent real-time leaks.

Solution

A lightweight browser extension that scans input fields and editable text in real-time before submission, detects common PII patterns (phone, email, ID, bank card), and warns users with an option to redact. Supports custom sensitive words and regex rules.

Users

Privacy-conscious individuals, HR, legal, customer support, and other professionals handling sensitive data.

MVP

Detect common PII types; real-time scan of input fields and editable areas; warning popup before sending; allow ignore or redact; local processing, no data upload.

Revenue

Free basic version; premium offers custom rules, team policy management, and audit logs via monthly subscription.

Why now

Data breaches are frequent, privacy awareness is growing, and browser extensions are cheap to build—ideal for indie hackers to validate quickly.