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PromptShield scans text for emails, phone numbers, IP addresses, API keys and tokens, private keys, credit card numbers (Luhn-validated), IBANs (checksum-validated), crypto wallet addresses, SSNs and more, then offers a redacted version safe to paste into an AI chat.
The scan is never logged or stored. Available as a web app, a Windows desktop app, and a browser extension for ChatGPT, Claude, Gemini, Copilot and Perplexity.
Source code: https://github.com/AurelioAvila/promptshield
Web app: https://promptshield-beta.vercel.app
Features
- Local-only history, never synced to a server
- Luhn-validated card detection, mod-97 IBAN checksum
- Custom protected terms (client names, project codenames)
- Works on ChatGPT, Claude, Gemini, Copilot and Perplexity
- Available as web app, Windows desktop app and browser extension
Project Samples
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