⚡ 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.

Statistics based on 3.6M+ analyzed websites. About this data

⭐ 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 86.8% share.
It is followed by 🍪 JS Cookie with 8.6% and Modernizr with 7.3%.

✨ Best JavaScript Utility Libraries

Below is a more detailed list of the top 25 of the 38 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
RankNameMarket 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
2
🍪 JS Cookie
Germany

An open-source, lightweight JavaScript library for managing browser cookies.

FreeOpen source
3
Modernizr
San Francisco, California, United States

An open-source feature detection library that identifies browser support for HTML, CSS, and JavaScript features and allows websites to adapt accordingly.

FreeOpen source
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
5
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
6
jQuery Cookie
Germany

A deprecated jQuery plugin for reading, writing and deleting cookies.

FreeOpen sourceLegacy
7
Moment.js
San Francisco, California, United States

An open-source JavaScript library for parsing, validating, manipulating, and formatting dates.

FreeOpen sourceLegacy
8
Lodash
San Francisco, California, United States

A modern JavaScript utility library that simplifies working with arrays, numbers, objects, strings, and composite functions.

FreeOpen source
9
RequireJS
San Francisco, California, United States

A JavaScript file and module loader.

FreeOpen source
10
PDF.js
Mountain View, California, United States

A Portable Document Format file viewer built with JavaScript and HTML5.

FreeOpen source
11
Clipboard.js
San Francisco, California, United States

A lightweight JavaScript library for copying text to the clipboard from web pages.

FreeOpen source
12
MooTools
Rome, Italy

An open-source JavaScript library that simplifies DOM manipulation, event handling, AJAX, animations, and object-oriented application development.

FreeOpen source
13
Less.js
Switzerland

A JavaScript library that converts Less styles to CSS styles.

FreeOpen source
14
SystemJS
Vancouver, Canada

A hookable, standards-based, dynamic ES module module loader.

FreeOpen source
15
SWFObject

A deprecated framework for detecting the Adobe Flash Player plugin and embedding Flash files.

FreeOpen sourceLegacy
16
Prototype
United States

A JavaScript framework that aims to ease development of dynamic web applications.

FreeOpen source
17
Closure Library
Mountain View, California, United States

A low-level JavaScript library designed for building complex and scalable web applications.

FreeOpen sourceLegacy
18
MathJax

An open-source JavaScript rendering engine for LaTeX, MathML, and AsciiMath notation that works in all modern browsers.

FreeOpen source
19
YUI
New York, United States

A legacy, open-source JavaScript and CSS library for building interactive web applications with a focus on modular architecture and cross-browser consistency.

FreeOpen sourceLegacy
20
Day.js

Fast 2kB alternative to Moment.js with the same modern API.

FreeOpen source
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
22
UAParser.js

A JavaScript library to detect the user's browser, engine, OS, CPU, and device type/model.

FreeOpen source$14+
23
libphonenumber-js

A simpler rewrite of Google's libphonenumber library in JavaScript.

FreeOpen source
24
jsPDF

An open-source library for generating PDFs in JavaScript.

FreeOpen source
25
Dexie.js

A minimalistic wrapper library for IndexedDB.

FreeOpen source

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