Shield: AI Privacy for ChatGPT & Claude by Infinium
Stop sharing sensitive data with AI tools. Auto-masks API keys, passwords & personal info in ChatGPT, Claude & Gemini. Free.
Some features may require paymentSome features may require payment
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About this extension
🛡️ InfiniUm Shield — AI Privacy Firewall
Every message you send to ChatGPT, Claude, or Gemini passes through their servers. Shield intercepts your prompts before they leave your browser, replaces sensitive data with safe tokens, and swaps them back in the AI's response.
Works automatically. Zero configuration. No account required.
What Shield protects:
🔴 Critical — API keys, passwords, database connections, JWT tokens, private keys, secret environment variables
🟡 Warning — Email addresses, phone numbers, credit cards, private IP addresses, SSNs
🟢 Info — Internal hostnames, system paths, URLs with credentials, personal names
How it works:
1. You type a message in ChatGPT, Claude, or Gemini
2. You press Send — Shield intercepts in milliseconds
3. Sensitive values replaced:
4. Clean prompt sent to AI — your data never exposed
5. AI responds — tokens swapped back to real values automatically
Free tier — 100% local, forever:
- All processing happens inside your browser
- Zero data sent anywhere — ever
- No account, no registration, no telemetry
Pro tier — $8/mo via infinium.tools:
- Custom rules — protect project names, client names, internal codenames
- Sync rules across all browsers and devices
- Advanced detection — .env files, cloud credentials, Stripe keys
- Full audit log (metadata only, never content)
GDPR & Compliance — Personal data is masked before transmission, helping organisations meet data minimisation obligations under GDPR, HIPAA, and SOC 2.
Built by InfiniUm Tools — infinium.tools/shield
Every message you send to ChatGPT, Claude, or Gemini passes through their servers. Shield intercepts your prompts before they leave your browser, replaces sensitive data with safe tokens, and swaps them back in the AI's response.
Works automatically. Zero configuration. No account required.
What Shield protects:
🔴 Critical — API keys, passwords, database connections, JWT tokens, private keys, secret environment variables
🟡 Warning — Email addresses, phone numbers, credit cards, private IP addresses, SSNs
🟢 Info — Internal hostnames, system paths, URLs with credentials, personal names
How it works:
1. You type a message in ChatGPT, Claude, or Gemini
2. You press Send — Shield intercepts in milliseconds
3. Sensitive values replaced:
[EMAIL_1] [API_KEY_1] [PASSWORD_1]4. Clean prompt sent to AI — your data never exposed
5. AI responds — tokens swapped back to real values automatically
Free tier — 100% local, forever:
- All processing happens inside your browser
- Zero data sent anywhere — ever
- No account, no registration, no telemetry
Pro tier — $8/mo via infinium.tools:
- Custom rules — protect project names, client names, internal codenames
- Sync rules across all browsers and devices
- Advanced detection — .env files, cloud credentials, Stripe keys
- Full audit log (metadata only, never content)
GDPR & Compliance — Personal data is masked before transmission, helping organisations meet data minimisation obligations under GDPR, HIPAA, and SOC 2.
Built by InfiniUm Tools — infinium.tools/shield
Rated 0 by 0 reviewers
Permissions and data
Required permissions:
- Access browser tabs
- Access your data for chatgpt.com
- Access your data for chat.openai.com
- Access your data for claude.ai
- Access your data for gemini.google.com
Optional permissions:
- Access your data for chatgpt.com
- Access your data for chat.openai.com
- Access your data for claude.ai
- Access your data for gemini.google.com
- Access your data for infinium.tools
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.2.2
- Size
- 52.09 KB
- Last updated
- 11 hours ago (Jun 14, 2026)
- Related Categories
- License
- All Rights Reserved
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection