JavaScript libraries; Performance
Who left Lozad.js, and who still runs it
3,671 websites in the top 1M run Lozad.js, observed directly from the rendered page in the July 2026 crawl.
295
stopped running it that month
17
of those are 11–500 employees
1,421
adopted it in the last year
Confirmed across two consecutive crawls, not a single month. Build the list →
Some companies running Lozad.js
Every row in a full list carries the prospect's whole detected stack.
Not currently available as a list.
What else they run
jQuery 93%Open Graph 81%Google Analytics 72%Cloudflare 63%core-js 54%PHP 54%Google Tag Manager 54%Google Font API 48%Bootstrap 44%HTTP/3 40%
Share of a 3,000-domain sample of Lozad.js users that also run each.