⚡ Legacy Technologies

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.

According to our data, legacy technologies are detected on 19.4% of all websites.
81.6% of these sites use only one legacy technology, 15.6% use two, and 2.9% use three or more of them.

⭐ Most Popular in 2025

The following chart shows the leading legacy technologies in 2025, based on market share.

The most popular is Magnific Popup with a share of 25%, followed by jQuery Mousewheel with 12.9% and jQuery Cookie with 12.7%.

Magnific Popup 25%
jQuery Mousewheel 12.9%
jQuery Cookie 12.7%
Google URL Shortener 12.6%
Adobe Flash 5.4%
ASP 4.2%
AddThis 4.1%
iLightBox 3.6%
Polymer 3.4%
CentOS 3%
Skrollr 3%
Picturefill 2.6%
jQuery LazyLoad 2.4%
Messenger Customer Chat 2.2%
Other 2.9%

You can also drill down by country:

🚀 Country Highlights

Here is a list of technologies that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

jQuery Cookie is #1 in Japan ^(-2)
Google URL Shortener is #1 in Taiwan ^(-3)
ASP is #1 in China ^(-5)
Messenger Customer Chat is #1 in Vietnam ^(-13)
Skype is #1 in Thailand ^(-14)
Adobe Flash is #2 in Hong Kong ^(-3)
iLightBox is #2 in Iran ^(-6)
AngularJS is #4 in Denmark ^(-13)
AddThis is #5 in the United Kingdom ^(-2)
Polymer is #5 in Canada ^(-4)

✨ Best Legacy Technologies

Below is a more detailed list of the top 25 of the 111 legacy technologies we detect, 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%
2	jQuery Mousewheel A jQuery plugin that adds cross-browser mouse wheel support. FreeOpen sourceLegacy	12.9%
3	jQuery Cookie A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	12.7%
4	Google URL Shortener Mountain View, California, United States A deprecated link service from Google. Legacy	12.6%
5	Adobe Flash San Jose, California, United States A discontinued multimedia software platform for creating animations and interactive apps. Legacy	5.4%
6	ASP Redmond, Washington, United States A server-side scripting language and dynamic web page engine. FreeLegacy	4.2%
7	AddThis Austin, Texas, United States A social bookmarking service that discontinued its services on May 31, 2023. FreeLegacy	4.1%
8	iLightBox A commercial jQuery lightbox plugin. $16+Legacy	3.6%
9	Polymer A library for creating encapsulated, reusable web components. FreeOpen sourceLegacy	3.4%
10	CentOS Raleigh, North Carolina, United States A discontinued open-source Linux distribution compatible with RHEL. Legacy	3%
11	Skrollr Standalone parallax scrolling JavaScript library for mobile (Android, iOS) and desktop in about 12k minified. FreeOpen sourceLegacy	3%
12	Picturefill A responsive image polyfill for , srcset, sizes, and more. FreeOpen sourceLegacy	2.6%
13	jQuery LazyLoad A deprecated jQuery lazy loading plugin. FreeOpen sourceLegacy	2.4%
14	Messenger Customer Chat Menlo Park, California, United States The website chat widget from Meta that was retired in May 2024. Legacy	2.2%
15	Skype Redmond, Washington, United States A communications platform for voice and video calls and sending instant messages that was retired on May 5, 2025 in favor of Microsoft Teams. FreeLegacy	2.2%
16	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%
17	AngularJS Mountain View, California, United States A discontinued open-source web framework from Google that has been superseded by Angular. FreeOpen sourceLegacy	1.8%
18	SWFObject A deprecated framework for detecting the Adobe Flash Player plugin and embedding Flash files. FreeOpen sourceLegacy	1.8%
19	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	1.3%
20	Google Funding Choices Mountain View, California, United States A messaging tool for GDPR and CCPA compliance and ad blocking recovery. Legacy	1.2%
21	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	1.1%
22	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	0.8%
23	Alexa Seattle, Washington, United States A web traffic analysis service from Amazon that was discontinued in 2022. Legacy	0.7%
24	Turbolinks Chicago, Illinois, United States A JavaScript library that allows web apps to behave like a single page application. FreeOpen sourceLegacy	0.7%
25	iScroll A high-performance JavaScript library for smooth scrolling. FreeOpen sourceLegacy	0.7%

Data is based on the analysis of 2,764,714 websites.
Statistics were last calculated on December 28, 2025.
For details, see our methodology and disclaimer.