Advertising & PixelsWhat is Meta Pixel?
The Meta Pixel (formerly the Facebook Pixel) tracks visitor actions to measure and optimise Facebook and Instagram ad campaigns, build custom audiences, and power retargeting across Meta’s platforms.
Why Meta Pixel matters
The Meta Pixel is one of the most widespread — and most scrutinised — advertising tags on the web. It is a frequent subject of privacy enforcement because it commonly fires before consent and sometimes captures form data it should not. Getting it right is both a performance and a compliance issue.
Sites using Meta Pixel
A sample of domains in the TagStack index where Meta Pixel was detected.
What's usually deployed alongside Meta Pixel
Share of indexed containers running Meta Pixel that also run each tool. Based on a sample of the index, so treat these as approximate.
Is your Meta Pixel set up correctly?
- The pixel does not fire before the visitor has given consent (a common source of GDPR complaints).
- No sensitive form fields (email, phone) are captured in automatic-advanced-matching without hashing.
- Standard events (Purchase, Lead) are implemented with values, not just PageView.
- The pixel is loaded once, not duplicated.
See Meta Pixel on any website
Enter a URL to reveal its full tracking stack — every tag, pixel and consent tool — in seconds. No login or code access required.
Common Meta Pixel alternatives
Meta Pixel FAQ
TagStack has detected Meta Pixel in 430,817 Google Tag Manager containers across its index of 3,278,587 scanned domains. That reflects sites deploying Meta Pixel through GTM, so sites that install it directly in their source code are not counted.