Guardpup
Get Guardpup

Windows App Being tested

For the ChatGPT and Claude desktop apps (Perplexity: being tested), on Windows. It checks what you paste into them, on your PC. This is a first version, not yet tried on many PCs: tell us how it goes.

Install It

  1. Download it from the download page. For ARM PCs (Surface, Snapdragon), take the ARM version there.
  2. Open it. Windows may warn that it doesn't know the app yet: click More info, then Run anyway.

Guardpup says "Guardpup is running" and lives in the notification area, at the bottom right of the taskbar (under the ^ arrow if it's hidden).

When You Paste a Secret

Paste into ChatGPT or Claude, and if there's a secret in it, Guardpup asks before anything goes in, for example "This has an OpenAI API key in it. Paste it into ChatGPT masked, or as it is?" It shows your value next to the stand-in the app would get.

ButtonWhat it does
Paste Masked (Ctrl+V)Pastes with stand-ins in place of each secret.
Paste Original (Ctrl+Alt+V)Pastes what you copied, as it is.
Cancel (Esc)Pastes nothing.

When you copy an AI's reply, your real keys and passwords come back in place of the stand-ins Guardpup sent, so code it wrote works. A paste back into an AI app is checked again.

The Menu

Click Guardpup in the notification area:

In the menuWhat it does
Also Protect Personal DetailsEmails, phone numbers, names and addresses.
Real Values When I Copy From an AI AppCopying a reply gives you your real values in place of the stand-ins.
Show a Note When Something Is MaskedA short note after each masked paste.
Pause for 1 Hour, Turn OffPausing turns itself back on.
Open at LoginStarts Guardpup when you sign in to Windows.
Quit GuardpupStops it until you open it again.

Updates

Guardpup asks once a day for the newest version number. When there's a new one, it says so, and its menu shows A New Version of Guardpup Is Available, which takes you to the download.

Remove It

Settings → Apps → Installed apps → Guardpup → Uninstall.