ArrowMem Paste Guard

Warns before pasting a card number, SIN, labeled SSN, labeled passport or secret key into an AI chat composer.

Paste Guard warns you before you paste something sensitive into an AI chat. It watches the composer box on major AI chat sites. When a paste, drop or send looks like a payment card number, a Social Insurance Number, a labelled Social Security Number, a labelled passport line or a secret API key, it stops and asks first. You decide whether to send. Everything happens in your browser. Paste Guard has no backend, no account and no network access of any kind, so it cannot send your text anywhere, including to us. The only permission it requests is local storage, for your own settings. Private windows are a special case: Chrome runs no extensions in Incognito unless you allow them. To be protected there too, open chrome://extensions, find Paste Guard, and turn on Allow in Incognito. Open source, so you can read every line and build it yourself: github.com/ArrowMem/paste-guard