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Guide

How to protect ChatGPT prompts that contain sensitive data.

If prompts may contain customer details, financial identifiers, or secrets, the safest pattern is to detect and replace raw values before the browser sends the message to ChatGPT.

Common ChatGPT leakage scenarios

  • Pasting support tickets that contain names, emails, phone numbers, or addresses.
  • Sending code snippets that include API keys, tokens, or client secrets.
  • Sharing billing or operations text that contains account numbers, VAT numbers, or IBANs.

What prompt protection should do

  • Run before native send is triggered.
  • Replace sensitive values with stable placeholders.
  • Keep enough context so the AI model can still answer correctly.
  • Work inside the browser without routing the prompt through an extra service.

Why placeholders matter

Simple blocking is often not enough. Stable placeholders let the AI reason about structure and relationships without receiving the raw sensitive values.