How can I find out which tracking pixels a website uses?

Enter the URL into the tracking pixel detector. It scans the page's HTML and scripts for pixel fingerprints — such as fbq for Meta, gtag.js for Google, or ttq for TikTok — and lists every marketing and analytics pixel it finds.

How does the detector find them?

It scans the page source for known pixel endpoints (like facebook.com/tr), 1x1 and hidden images, and beacon requests to third-party domains, then lists what it found with evidence.

Does it catch every tracker?

It catches pixels and beacons visible in the initial page source. Trackers loaded later by JavaScript, or proxied through the site own domain, may not be visible in a single scan.

Are tracking pixels dangerous?

They are mostly a privacy concern rather than a security threat: they let third parties follow you across the web. Knowing which ones a site uses helps you decide whether to trust it or block them.

What is the difference from the analytics detector?

The analytics detector focuses on measurement tools like Google Analytics. The pixel detector focuses on advertising and cross-site tracking pixels and beacons, including ones from ad networks and data brokers.

TECHNOLOGY DETECTION TOOLS · FREE ONLINE TOOL

Tracking Pixel Detector

Find hidden tracking pixels and beacons on any siteOpen a single news article and a dozen companies may learn you read it. Enter a page URL and this checker catalogs every third-party tracker loaded: ad pixels built for retargeting and analytics tools built for measurement.

✓ Free to use✓ No sign-up✓ Ready in your browser

// TRACKING PIXEL DETECTOR · GET STARTED

Use Tracking Pixel Detector

Find hidden tracking pixels and beacons on any site

// TRACKING PIXEL DETECTOR · HOW IT WORKS

How to use the Tracking Pixel Detector

Enter URL

Enter the website URL (e.g. example.com).

Scan the page

Click "Detect pixels" to scan the page source.

Review pixels

Review every pixel and beacon found.

// TRACKING PIXEL DETECTOR · ABOUT THIS TOOL

About the Tracking Pixel Detector

Tracking pixels are the web's quietest observers: invisible images and tiny scripts that phone home to advertisers and data brokers every time a page loads. This free detector scans the public HTML for known pixel endpoints, 1x1 images and beacon calls to third-party domains.

It lists each tracker with the evidence used, so you can audit your own pages or see who is watching a site before you decide to stay.

Where it helps most

Two sides of the same tracker list.

Audit for compliance

Consultants checking a client's site map every tracker before a compliance review, catching the forgotten pixels that prevent real trouble.

Verify the funnel

Marketers verify the full funnel is actually tracked, with Meta, TikTok and Google pixels each confirmed live on the right pages.

Catch plugin trackers

Site owners run it after installing new plugins or embeds, since one social share button can drag in three unapproved trackers.

Flag duplicates

The checker flags duplicate pixels too, since the same tracker installed twice is a very common source of inflated data.

Know the limits

What loads in the browser, and what does not.

Ads vs analytics

Each entry notes whether it is an advertising pixel built for retargeting or an analytics tool built for measurement, because the distinction matters.

Plugin drag-ins

Trackers dragged in by plugins, embeds or social share buttons still load in the page, so the scan catches them all.

Scriptless stays hidden

The scan sees what loads in the browser, while server-side tracking and scriptless fingerprinting stay out of reach by design.