Block Email Tracking Pixels.
Protect Your Privacy.
Trocker is a free, open-source browser extension that blocks tracking pixels in Gmail, Outlook, Yahoo, and other webmail services.
No Data Transmitted
Trocker operates exclusively on your local machine. No data is ever sent to any server. It runs entirely within your browser to protect you.
Efficient Protection
Unlike ad-blockers that run on every page, Trocker is efficient. It only activates when a tracker is detected in your webmail, preserving your browser's performance.
Universal Support
Works seamlessly with major webmail providers including Gmail, Yahoo, and Outlook.com, detecting and blocking tracking attempts automatically.
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Read Article →Frequently Asked Questions
- I had an email which I know was tracked, but Trocker didn't block it. Why?
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Some tracking images do not have specific size indicators that Trocker uses for detection before loading. If you encounter one, please forward the email (with personal info removed) to trockerapp@gmail.com so we can improve our blacklist.
Also, try enabling Trocker in incognito mode. If it works there, another extension might be interfering. Certain other browser extensions (especially email tracking tools) can bypass blockers or spy on their users. You can read more about this on our Medium post.
- Why does Trocker require "Access your data for all websites"?
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Technically, this requires the
<all_urls>permission. Trocker needs it for three key reasons:- Reliable Protection: To strictly inspect and whitelist safe images, especially in Firefox, ensuring trackers don't slip through.
- Broad Coverage: To block email trackers in webmails that don't proxy images themselves (e.g., Outlook.com).
- Link Safety: To bypass "tracked links" that monitor your clicks, allowing you to reach your destination privately.
Without this permission, Trocker cannot guarantee your privacy across all services. It runs strictly locally and never transmits your data. For more details on the technical reasoning, see the GitHub discussion.
- Trocker has recently stopped working correctly in Gmail/Yahoo/Outlook! Why?
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Every once in a while, these webmail providers update their designs or change their underlying code, which can break Trocker's parsing logic. We constantly monitor and update Trocker to adapt to these changes. If you notice it has stopped working, please report the issue by emailing us at trockerapp@gmail.com or opening an issue on GitHub so we can fix it promptly.