PixelBlock – A Gmail extension that blocks email tracking

In plain words

PixelBlock is a Gmail extension that prevents email tracking by blocking tracking pixels in incoming messages. Launched in 2014, it works within the Gmail interface to protect user privacy. The tool is designed for Gmail users who want to stop senders from knowing when they open emails or gathering metadata about their email activity. It operates transparently in the background without requiring manual intervention for each message.

written from the facts on this page · September 2026

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