Prompt Guard - AI Privacy Engine

Masks sensitive data locally before sending it to AI services.

Prompt Guard – Local AI Privacy & Data Protection Engine Protect your sensitive data, client confidentiality, and personal information before it ever reaches AI providers. Prompt Guard operates 100% locally in your browser to detect and mask confidential inputs before transmission. Key Features: - Automatic CPR & Email Masking: Instantly detects danish national ID numbers (CPR) and email addresses in prompts. - Custom Confidential Keywords: Add your own confidential project names, client identifiers, or internal terms in settings. - Multi-Platform Support: Works seamlessly across ChatGPT, Google Gemini, Claude AI, Lovable.dev, and custom AI domains. - Multi-Layer Protection: Intercepts data via network fetches, clipboard pastes (Ctrl+V), and live keyboard input. - Reversible Unmasking: Safely restores masked data in the AI's response badges inside your browser view only. 100% Local & Private Zero external server requests. No data collection or tracking. Full GDPR compliance by design.