The Trade Desk is a demand-side platform; its universal pixel tracks conversions and audiences.
About 4,187 websites in the PageSourceSearch index contain the code that reveals it; the 50 highest-ranked are listed below.
How is The Trade Desk Universal Pixel detected?
The universal pixel loads up_loader.<version>.js from js.adsrvr.org. The discovery keyword is the exact bytes PageSourceSearch looks for in every stored page and script:
A literal is matched byte for byte, case-sensitively. Combine it with another keyword, a domain, a kind or a date filter on the search page to narrow the list. About The Trade Desk Universal Pixel
Top 50 websites using The Trade Desk Universal Pixel
Ranked by the domain's position in the crawl's ranked list (Common Crawl harmonic centrality), highest first. view source opens the stored page or script with the match highlighted. Computed 2026-09-30 16:18:54 UTC.
Questions about finding The Trade Desk Universal Pixel
How does PageSourceSearch know a website uses The Trade Desk Universal Pixel?
By the source itself: The universal pixel loads up_loader.<version>.js from js.adsrvr.org. PageSourceSearch stores the raw HTML and first-party JavaScript of each crawled site and matches the keyword byte for byte, so every listed site's stored source contains it.
Is this a complete list of websites using The Trade Desk Universal Pixel?
No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of about 4,187 websites that do; the count is the index's estimate at the time the list was computed. Run the keyword as a search to page through all of them, or add a kind or date filter.
How do I find websites that use The Trade Desk Universal Pixel together with another technology?
Search for both keywords at once: several terms separated by spaces must all be found on the same site, or with the Same page toggle in the same page. For example js.adsrvr.org/up_loader with wp-content/plugins/ lists the WordPress sites that use The Trade Desk Universal Pixel.