PromptShield - AI Data Loss Prevention & Privacy

Automatically masks API keys, emails, financial records, and confidential secrets before they reach ChatGPT, Claude, and Gemini.

PromptShield masks sensitive data in your prompts before they reach ChatGPT, Claude, and Gemini. It's easy to paste an API key, a customer's email, or a card number into an AI chat. PromptShield spots them as you type and replaces them with placeholders like [REDACTED_EMAIL_1], so the AI gets your question without your private data. HOW IT WORKS • A warning bar above the prompt box shows what was detected • Click Mask Now, or let PromptShield mask automatically when you send • The AI receives placeholders, and replies stay masked on your screen WHAT IT DETECTS • API keys and tokens • Credit card numbers • Social Security numbers • Email addresses • Phone numbers • IP addresses • Financial amounts • Your own confidential terms (Pro) PRIVATE BY DESIGN Detection runs in your browser. Your prompts are never sent to PromptShield's servers. PLANS • Free Starter: 20 redactions per day • Pro: unlimited redactions and custom terms, $3 per month • Lifetime: everything in Pro, one payment of $14 A free PromptShield account is required to get your license key: https://promptshield.pro/signup PromptShield is an independent product and is not affiliated with OpenAI, Anthropic, or Google.