Detecting UK PII in-browser before exfiltration — viable approach?

1. 1Build a regex pattern to match UK postcodes
2. 2Implement format validation for NI numbers
3. 3Apply mod-11 check for NHS numbers
4. 4Configure native browser Highlight API for inline marking of detected PII
5. 5Test optional redaction before submission to ensure data protection

This approach benefits cybersecurity teams and developers who need to protect sensitive UK user data from accidental leakage into AI tools and web apps

💡 Using a client-side approach with regex and validation layers can effectively reduce accidental PII leakage

🚨 Detect UK PII in-browser before it's too late! 🚨