⚡ Legacy Technologies in the United Kingdom

Legacy technologies are platforms and tools that have been discontinued or shut down and no longer operate. Some are completely defunct, while others remain functional but unsupported.

The United Kingdom of Great Britain and Northern Ireland (UK) is a Western European country with a population of over 67 million people.

According to our data, legacy technologies are detected on 18.3% of websites from the United Kingdom.

⭐ Most Popular in 2026

The following chart shows the top legacy technologies in the United Kingdom in 2026, based on market share.

The most popular is Magnific Popup with a share of 25.3%, followed by jQuery Cookie with 13.1% and jQuery Mousewheel with 13%.

Magnific Popup 25.3%
jQuery Cookie 13.1%
jQuery Mousewheel 13%
Google URL Shortener 8.2%
AddThis 6.7%
ASP 6.6%
Polymer 4.7%
Adobe Flash 4.4%
iLightBox 3.8%
Picturefill 3.5%
Skrollr 3.1%
Google Webmaster Tools 2.4%
Google Optimize 1.8%
CentOS 1.6%
Other 1.8%

🚀 Highlights

Here is a list of the top technologies that are more popular in the United Kingdom than worldwide.
Differences between global and country rankings are shown in parentheses.

3. jQuery Mousewheel ^(-1)
5. AddThis ^(-1)
6. ASP ^(-1)
7. Polymer ^(-1)
10. Picturefill ^(-2)
12. Google Webmaster Tools ^(-4)
13. Google Optimize ^(-8)
15. SWFObject ^(-3)
16. AngularJS ^(-1)
20. Microsoft FrontPage ^(-2)

✨ Best Legacy Technologies

Below is a more detailed list of the top 25 of the 94 legacy technologies used on sites from the United Kingdom, ranked by their market share.

Rank	Name	Market share
1	Magnific Popup A responsive lightbox and dialog plugin for jQuery and Zepto.js. FreeOpen sourceLegacy	25.3%
2	jQuery Cookie A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	13.1%
3	jQuery Mousewheel A jQuery plugin that adds cross-browser mouse wheel support. FreeOpen sourceLegacy	13%
4	Google URL Shortener Mountain View, California, United States A deprecated link service from Google. Legacy	8.2%
5	AddThis Austin, Texas, United States A social bookmarking service that discontinued its services on May 31, 2023. FreeLegacy	6.7%
6	ASP Redmond, Washington, United States A server-side scripting language and dynamic web page engine. FreeLegacy	6.6%
7	Polymer A library for creating encapsulated, reusable web components. FreeOpen sourceLegacy	4.7%
8	Adobe Flash San Jose, California, United States A discontinued multimedia software platform for creating animations and interactive apps. Legacy	4.4%
9	iLightBox A commercial jQuery lightbox plugin. $16+Legacy	3.8%
10	Picturefill A responsive image polyfill for , srcset, sizes, and more. FreeOpen sourceLegacy	3.5%
11	Skrollr Standalone parallax scrolling JavaScript library for mobile (Android, iOS) and desktop in about 12k minified. FreeOpen sourceLegacy	3.1%
12	Google Webmaster Tools Mountain View, California, United States The old Google Webmaster Tools, detected by the meta name "verify-v1", which have been deprecated in favor of Google Search Console. FreeLegacy	2.4%
13	Google Optimize Mountain View, California, United States A free website optimization tool integrated with Google Ads that enabled A/B, multivariate, and redirect landing page testing. Legacy	1.8%
14	CentOS Raleigh, North Carolina, United States A discontinued open-source Linux distribution compatible with RHEL. Legacy	1.6%
15	SWFObject A deprecated framework for detecting the Adobe Flash Player plugin and embedding Flash files. FreeOpen sourceLegacy	1.5%
16	AngularJS Mountain View, California, United States A discontinued open-source web framework from Google that has been superseded by Angular. FreeOpen sourceLegacy	1.5%
17	jQuery LazyLoad A deprecated jQuery lazy loading plugin. FreeOpen sourceLegacy	1.4%
18	Messenger Customer Chat Menlo Park, California, United States The website chat widget from Meta that was retired in May 2024. Legacy	1.4%
19	Google Funding Choices Mountain View, California, United States A messaging tool for GDPR and CCPA compliance and ad blocking recovery. Legacy	1.2%
20	Microsoft FrontPage Redmond, Washington, United States A WYSIWYG HTML editor and website administration tool that was part of Microsoft Office until it was discontinued in 2003. $149Legacy	1.1%
21	Oribi Mountain View, California, United States An all-in-one marketing analytics solution acquired by LinkedIn. Legacy	1%
22	Oracle Moat Austin, Texas, United States A measurement and marketing analytics suite designed to measure media performance across digital and TV advertising campaigns. Legacy	0.9%
23	Facebook Like Box Menlo Park, California, United States A plugin that allowed admins to promote their Facebook Pages and embed a simple feed of content from a Page into other sites. Legacy	0.8%
24	Turbolinks Chicago, Illinois, United States A JavaScript library that allows web apps to behave like a single page application. FreeOpen sourceLegacy	0.8%
25	Alexa Seattle, Washington, United States A web traffic analysis service from Amazon that was discontinued in 2022. Legacy	0.7%

👉 See Also

🌎 Legacy in other countries

Data is based on the analysis of 157,370 websites from the United Kingdom.
Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.