Protect your data in AI chats.
Warns you before you paste a credit card, password, API key or medical data into ChatGPT, Claude, Gemini, Copilot or any AI chatbot. Everything runs locally — nothing is sent anywhere.
AI chatbots are incredibly useful — but they're also a new vector for accidental data leaks. People routinely paste confidential information without thinking: a credit card to "check if this receipt is correct", an API key to "help debug this config", a medical history to "explain my diagnosis". Once sent, that data is processed by a third-party server you don't control.
dataguard sits between your keyboard and the send button. It scans what you're about to submit and alerts you before you share something sensitive.
| Category | Severity |
|---|---|
| Credit / debit card numbers (Luhn-validated) | 🔴 Critical |
| IBAN / bank account numbers | 🔴 Critical |
| API keys & secret tokens (sk-, Bearer, AKIA...) | 🔴 Critical |
| US Social Security Numbers | 🔴 Critical |
| French Numéro de sécurité sociale | 🔴 Critical |
| Password written in plain text | 🟠 High |
| Medical / health data | 🟠 High |
| Personal address | 🟡 Medium |
- You type a message in ChatGPT, Claude, Gemini, Copilot, Perplexity or Poe.
- When you press Enter or click Send, dataguard scans the text.
- If it finds something sensitive, it shows a warning with the risk level.
- You choose: Edit the message (go back) or Send anyway (your call).
No false block: you always have the final word.
Everything runs 100% locally in your browser. dataguard never reads your messages after you send them, never connects to any server, and never stores anything. The extension permissions cover only the AI chatbot domains, nothing else.
- Download this repo (Code → Download ZIP) and unzip it.
- Open
chrome://extensionsin Chrome. - Turn on Developer mode.
- Click Load unpacked and select the
dataguardfolder.
Works on Chrome, Edge, Brave and any Chromium browser.
ChatGPT · Claude · Gemini · Microsoft Copilot · Perplexity · Poe
More can be added — open an issue with the domain.
MIT — built by @ElonCmedia