Ugly Email by Sonny T.

The #1 downloaded Gmail extension for blocking read receipts and other email tracking pixels.

Ugly Email is an open-source Gmail extension for identifying and blocking email trackers.

Ugly Email scans through your inbox and looks for emails containing tracking pixels. Tracked emails are labeled with an eyeball icon, and the tracking pixel is blocked.

All of the Ugly Email data is stored on your browser's IndexDB storage locally. We do not track, transfer, or store any of your information.