PasteGuard

Tracking since Apr 30, 2026.

Changelog

• May 11, 2026
  description

  WHY PASTEGUARD?
  Every time you paste data into an AI chatbot, you risk leaking sensitive information. PasteGuard intercepts the paste event before it reaches the AI, replaces sensitive data with anonymous placeholders, and — uniquely — restores the real values in the AI's response so you can read them normally.
  
  HOW IT WORKS
  1. Copy text containing sensitive data
  2. PasteGuard detects it instantly using local pattern matching
  3. The AI receives [EMAIL_1] instead of your real email
  4. When the AI responds, PasteGuard shows you the real value highlighted in context
  
  WHAT IT PROTECTS
  • Email addresses
  • Phone numbers (international formats)
  • Credit card numbers
  • Social Security Numbers (SSN)
  • API keys & tokens (Bearer, sk-, pk-, ghp_, AIza, AKIA…)
  • IP addresses
  • IBAN codes (all EU countries)
  
  SUPPORTED PLATFORMS
  • ChatGPT (chatgpt.com)
  • Claude (claude.ai)
  • Google Gemini (gemini.google.com)
  • Microsoft Copilot (copilot.microsoft.com)
  
  PRIVACY FIRST
  Zero servers. Zero telemetry. Zero data leaves your browser. All pattern matching runs entirely in the content script on your machine.
  
  PERMISSIONS
  • storage — to save your toggle preferences
  • activeTab — to inject the content script on AI chat pages only

  WHY PASTEGUARD?
  Every time you send a message to an AI chatbot, you risk exposing sensitive data — emails, phone numbers, credit cards, API keys. PasteGuard detects them automatically, lets you review and control what gets masked, and replaces only the confirmed items when you hit Send. The AI never sees your real data. You read the response normally.
  
  HOW IT WORKS
  
  Paste or type a message — PasteGuard detects sensitive data instantly using local pattern matching
  A review panel shows every detected item with a toggle. Turn off any false positives
  Press Enter or click Send — only the toggled-on items are replaced with neutral placeholders like [EMAIL_1]
  When the AI responds with a placeholder, PasteGuard restores the real value highlighted in context
  WHAT IT PROTECTS
  Free tier:
  • Email addresses
  • Phone numbers (international formats)
  • Credit card numbers
  
  Pro / Business tier (all of the above, plus):
  • Social Security Numbers (SSN)
  • API keys & tokens (sk-, pk-, ghp_, AIza, AKIA…)
  • IP addresses
  • IBAN codes (all EU countries)
  • Italian fiscal codes
  • Manual custom selection — highlight any word and censor it on the spot
  
  SUPPORTED PLATFORMS
  • ChatGPT (chatgpt.com)
  • Claude (claude.ai)
  • Google Gemini (gemini.google.com)
  
  PRIVACY FIRST
  Zero servers. Zero telemetry. Zero data leaves your browser. All pattern matching runs entirely on your machine. No account required for the free tier.
  
  PERMISSIONS
  • storage — to save your category preferences and license cache

Permissions & access

Permissions

storage

Host access

https://chatgpt.com/*, https://chat.openai.com/*, https://claude.ai/*, https://gemini.google.com/*, https://solitary-wildflower-34b8.scanuandrea1997.workers.dev/*

Screenshots