Prompt Armour — AI Privacy Guard wót TheAlexRider

Prompt Armour is a privacy-focused Chrome and Firefox extension that scans your input on AI chatbot platforms and catches sensitive data before it's sent.

What It Catches

• Emails, phone numbers, SSNs, credit cards
• AWS access keys, secret keys, ARNs, EC2 instance IDs
• Database connection strings (MongoDB, Postgres, MySQL, Redis)
• Bearer tokens, Basic auth headers, session cookies
• IPv4/IPv6 addresses, MAC addresses
• High-entropy strings (random passwords, unknown API keys)
• Names and locations (lightweight NLP detection)

Works Where You Work

• ChatGPT (chat.openai.com & chatgpt.com)
• Google Gemini
• Claude (claude.ai)

Redaction Styles

• Tagged: [EMAIL-1], [AWS-KEY-2] (preserves context)
• Masked: ****
• Redacted: [REDACTED]

You Stay in Control

• One-click redact, one-click undo
• Hover to selectively revert individual items
• Session whitelist for false positives ("Allow once")
• Granular filter toggles per detection category

Privacy by Design

• 100% client-side processing
• Zero data leaves your browser
• No servers, no accounts, no tracking
• No data collection whatsoever

Built Different

• CSS Custom Highlight API for non-destructive highlighting
• Works inside hostile rich text editors (ProseMirror, Draft.js)
• Shadow DOM isolation for injected UI components
• Regex + Shannon entropy detection engine

Free to use. Core protection is free and will stay free forever. Pro tier planned later for advanced features like custom regex patterns and team policy management.

Website: https://prompt-armour.vercel.app/