⚡ JavaScript Utility Libraries

JavaScript utility libraries provide reusable functions that simplify common development tasks in web applications.

They offer helpers for data manipulation, date and time handling, feature detection, module loading, HTTP requests, browser storage, and environment compatibility, reducing the need to write repetitive low-level code.

⭐ Most Popular in 2026

The following chart shows the leading JavaScript utility libraries in 2026, based on market share.

The most popular is jQuery, which dominates the market with an overwhelming 87.4% share.
It is followed by 🍪 JS Cookie with 8.4% and Modernizr with 7.6%.

jQuery 87.4%
🍪 JS Cookie 8.4%
Modernizr 7.6%
Underscore.js 6%
SystemJS 5.2%
Web Font Loader 4.2%
jQuery Cookie 3.5%
Moment.js 2.2%
Lodash 1.8%
RequireJS 0.9%
MooTools 0.8%
Clipboard.js 0.7%
PDF.js 0.7%
Less.js 0.5%
Prototype 0.5%

🚀 Country Highlights

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

🍪 JS Cookie is #3 in Iran ^(-5)
SystemJS is #3 in Kazakhstan ^(-20)
Modernizr is #6 in Switzerland ^(-6)
jQuery Cookie is #7 in Korea ^(-23)

✨ Best JavaScript Utility Libraries

Below is a more detailed list of the top 25 of the 41 JavaScript utility libraries we detect, ranked by their market share.

Available filters: 2D-Graphics 3D-Graphics Animation Carousel CSS Data Grids DOM Editors Lightbox Scroll SPA State Utility UI

Rank	Name	Market share
1	jQuery San Francisco, California, United States A fast, small, feature-rich JavaScript library designed to simplify HTML DOM tree traversal and manipulation, event handling, CSS animations, and Ajax. FreeOpen source	87.4%
2	🍪 JS Cookie Germany A simple, lightweight JavaScript library for handling browser cookies. FreeOpen source	8.4%
3	Modernizr A JavaScript library that detects the availability of HTML, CSS and JavaScript features in the user's browser. FreeOpen source	7.6%
4	Underscore.js Boston, Massachusetts, United States A utility library for JavaScript that provides support for functional programming helpers (each, map, reduce, filter) without extending any built-in JavaScript objects. FreeOpen source	6%
5	SystemJS Vancouver, Canada A hookable, standards-based, dynamic ES module module loader. FreeOpen source	5.2%
6	Web Font Loader San Jose, California, United States A JavaScript library that gives you added control when using linked fonts via @font-face. FreeOpen source	4.2%
7	jQuery Cookie A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	3.5%
8	Moment.js A JavaScript library for parsing, validating, manipulating, and formatting dates. FreeOpen source	2.2%
9	Lodash A modern JavaScript utility library that simplifies working with arrays, numbers, objects, strings, and composite functions. FreeOpen source	1.8%
10	RequireJS A JavaScript file and module loader. FreeOpen source	0.9%
11	MooTools A collection of JavaScript utilities for DOM management, AJAX, and event handling. FreeOpen source	0.8%
12	Clipboard.js A modern approach to copy text to clipboard. FreeOpen source	0.7%
13	PDF.js Mountain View, California, United States A Portable Document Format file viewer built with JavaScript and HTML5. FreeOpen source	0.7%
14	Less.js A JavaScript library that converts Less styles to CSS styles. FreeOpen source	0.5%
15	Prototype A JavaScript framework that aims to ease development of dynamic web applications. FreeOpen source	0.5%
16	SWFObject A deprecated framework for detecting the Adobe Flash Player plugin and embedding Flash files. FreeOpen sourceLegacy	0.4%
17	Axios A promise based HTTP client for the browser and Node.js. FreeOpen source	0.4%
18	Closure Library Mountain View, California, United States A low-level JavaScript library designed for building complex and scalable web applications. FreeOpen sourceLegacy	0.2%
19	MathJax An open-source JavaScript rendering engine for LaTeX, MathML, and AsciiMath notation that works in all modern browsers. FreeOpen source	0.2%
20	YUI New York, United States An open-source JavaScript and CSS library for building richly interactive web applications. FreeOpen source	0.2%
21	Cufon A discontinued JavaScript library that performs text replacement on web pages, using the canvas element and VML to render fancy fonts. FreeOpen sourceLegacy	0.1%
22	Day.js Fast 2kB alternative to Moment.js with the same modern API. FreeOpen source	0.1%
23	UAParser.js A JavaScript library to detect the user's browser, engine, OS, CPU, and device type/model. FreeOpen source$14+	0.08%
24	Socket.io A library that enables real-time, bidirectional and event-based communication between the browser and the server. FreeOpen source	0.08%
25	libphonenumber-js A simpler rewrite of Google's libphonenumber library in JavaScript. FreeOpen source	0.08%

Data is based on the analysis of 3,320,789 websites.
Statistics were last calculated on March 22, 2026.
For details, see our methodology and disclaimer.