Protect your privacy when using ChatGPT
Cloak automatically anonymizes sensitive information before sending to ChatGPT and restores it in responses. Your data stays private—all processing happens locally in your browser.
How it works
You type your message
Type normally in ChatGPT, including any sensitive information like emails, phone numbers, or credit cards.
Automatic anonymization
Cloak detects and replaces PII with tokens before sending to ChatGPT. Your real data never leaves your browser.
Seamless restoration
When ChatGPT responds, Cloak automatically restores your original data. You see the real information, ChatGPT never did.
What ChatGPT sees
Contact me at [EMAIL_1] or call [PHONE_1].
What you see
Contact me at user@example.com or call 555-123-4567.
What we protect
Cloak detects and anonymizes 16+ types of PII before they reach ChatGPT
- Email addresses
- Phone numbers (US & international)
- Credit card numbers
- Social Security Numbers (SSN)
- US EIN (tax ID) and UK NINO
- IP addresses
- API keys (Stripe, AWS, GitHub, etc.)
- MAC addresses
- IBAN (bank account numbers)
- US routing and account numbers
- UUIDs
- Passport numbers
- Driver's license numbers
- Dates of birth
- UK postcodes
Features
Everything you need to use ChatGPT without exposing your data
Automatic protection
Works seamlessly in the background. No configuration needed.
Comprehensive PII detection
Detects emails, phones, cards, SSNs, EIN/NINO, routing/account data, API keys, and more.
Privacy first
All processing happens locally in your browser. No data sent to external servers.
Formatting preserved
Markdown, code blocks, and formatting remain intact in responses.
Multi-conversation support
Tracks entity maps separately for each conversation.
Better controls in v2.0
Choose what to anonymize with grouped toggles, plus one-click all on/off actions.
Use cases
Share logs & errors safely
Paste stack traces, server logs, or error reports into ChatGPT for debugging. Cloak redacts IPs, API keys, and file paths so you get help without exposing your infrastructure.
Discuss code without leaking secrets
Ask for code reviews or refactoring advice while keeping tokens, credentials, and internal URLs private. Your real config never leaves the browser.
Use ChatGPT with real contact details
Draft emails, calendar text, or support replies that include your actual email and phone. ChatGPT only sees placeholders; you see your real PII in the response.
Installation
Get Cloak from Chrome Web Store or Firefox Add-ons. One-click install and automatic updates.
Available for Chrome and Firefox