Every day, employees paste emails, phone numbers and IBANs into AI chatbots without realizing it. Sentinelle PII detects and masks sensitive data in real-time before it reaches the AI. The AI works with anonymous tokens, then real data is restored in the response. Fully transparent. 100% local — no data leaves your browser ChatGPT, Claude, Gemini + custom domains Scans file uploads (CSV, Excel, Word) Team dashboard with GDPR compliance reports Free tier, no credit card

Hey PH! I'm Robin, solo founder of Sentinelle PII. I built this after realizing that every time someone asks ChatGPT to "write a follow-up email for client Jean Dupont (jean.dupont@example.com, IBAN FR76...)" — that data goes straight to OpenAI's servers. 68% of employees use AI without IT approval. Most companies rely on usage policies that nobody follows. I wanted a technical solution that actually works — invisible to the user, no IT setup needed. The extension detects sensitive data in your prompt, replaces it with tokens like [EMAIL_1], and restores the real data in the AI's response. Everything runs locally in your browser. Free to try (10 detections/day). Would love your feedback — what types of data should I detect next?

Sentinelle PII

Stop leaking personal data to ChatGPT, Claude & Gemini

Stop leaking personal data to ChatGPT, Claude & Gemini