mobile-detect.js detects mobile devices and tablets from the user-agent string.
About 72,271 websites in the PageSourceSearch index contain the code that reveals it; the 50 highest-ranked are listed below.
How is mobile-detect.js detected?
The site's own code creates a detector with new MobileDetect(. 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 mobile-detect.js
Top 50 websites using mobile-detect.js
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 2026-09-29 21:48:11 UTC.
How does PageSourceSearch know a website uses mobile-detect.js?
By the source itself: The site's own code creates a detector with new MobileDetect(. 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 mobile-detect.js?
No. The page lists the 50 highest-ranked sites in the index whose source holds the keyword, out of about 72,271 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 mobile-detect.js 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 MobileDetect( with wp-content/plugins/ lists the WordPress sites that use mobile-detect.js.