qs

Category - JavaScript Libraries

A querystring parser that supports nesting and arrays, with a depth limit


We have discovered  25,731 live websites   are using qs.

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Technology usage statistics

Websites using qs:25,731 websites
Most popular in: United States
Market position in JavaScript Libraries category:#240
Market penetration in JavaScript Libraries:0.10%
Most popular version:6.11

Security vulnerabilites

Known security issues associated with qs
PublishedCVETitleDomains
Dec, 2025CVE-2025-15284arrayLimit bypass in bracket notation allows DoS via memory exhaustion796
Feb, 2026CVE-2026-2391qs's arrayLimit bypass in comma parsing allows denial of service458
May, 2026CVE-2026-8723qs.stringify crashes on null/undefined entries in comma-format arrays under encodeValuesOnly55

Technology adoption

Recent changes in qs usage.
Websites that added qs 9,947
Websites that dropped qs 2,084
Websites that changed version of qs  49

Available Reports


Technology Information


Major Versions

  • 6.xx (26 subversions, 776 domains)
  • 3.xx (1 subversions, 2 domains)
  • 1.xx (1 subversions, 35 domains)

Website Distribution by Country

Number of websites using qs
United States7,140 websites


Germany6,141 websites
France1,836 websites
Netherlands1,456 websites
GB1,345 websites
Switzerland792 websites
Italy686 websites
Canada644 websites
Denmark543 websites
Spain395 websites

Website Distribution by TLD

Number of websites using qs
.com5,913 websites
.de4,884 websites
.org3,960 websites
.nl1,408 websites
.fr999 websites
.ch683 websites
.co.uk537 websites
.it527 websites
.net514 websites
.at421 websites

qs Versions

sorted by popularity
6.11240 websites
6.5.2144 websites
6.5.1121 websites
6.949 websites
1.135 websites
6.9.431 websites
6.625 websites
6.10.123 websites
6.1323 websites
6.719 websites

See all qs versions ...

Top Websites Using qs

A look at the most popular websites built with qs
DomainCountryRankContacts
liferay.com United States7,602
ezcater.com United States8,562
hipharp.com United States10,525
verkuskop.nl Netherlands11,630
prfk.org United States14,194
sandiegocounty.gov United States28,347
See full domain list

Always Used together



Alternative Technologies


jQuery: Total 21,298,566 domains found using jQuery
jQuery Migrate: Total 9,851,205 domains found using jQuery Migrate
jQuery UI: Total 5,538,621 domains found using jQuery UI
Swiper: Total 3,640,145 domains found using Swiper
html5shiv: Total 3,438,445 domains found using html5shiv
Polyfill: Total 2,072,823 domains found using Polyfill
Modernizr: Total 1,832,030 domains found using Modernizr
react-dom: Total 1,823,737 domains found using react-dom
WhatsApp: Total 1,806,245 domains found using WhatsApp
js-cookie: Total 1,667,847 domains found using js-cookie

FAQ

qs falls under the category of JavaScript Libraries.
WebTechSurvey systematically indexes websites and their technologies. Users can find websites using qs through the WebTechSurvey platform.
There are currently 58,006,045 live websites that use qs.
The main competitors to qs include jQuery, jQuery Migrate, jQuery UI, and Swiper.
qs has a known security vulnerabilities: CVE-2026-8723, CVE-2026-2391, CVE-2025-15284.