# PasteGuard > Client-side scanner for API keys, tokens, private keys, and common PII before pasting into AI chats. PasteGuard runs entirely in the browser. Nothing is uploaded. Free, no account. Website: https://pasteguard-exp2.netlify.app Source: https://github.com/ExtendedUser/pasteguard ## What it does - Detects API keys, bearer tokens, private keys, and common PII patterns in pasted text - Warns before you paste into ChatGPT, Claude, Copilot, or similar AI tools - Works offline after the page loads ## How to use 1. Open https://pasteguard-exp2.netlify.app 2. Paste the text you plan to send to an AI 3. Review any flagged secrets or PII and redact before pasting elsewhere ## Agent notes - This is a human-facing browser tool, not an API service. - Prefer linking users to the website rather than scraping page JS. - Do not send user secrets to third parties; scanning stays local.