Web development

JavaScript libraries

256 technologies: what each one does, whether it is SaaS or open source, its price range and its website.
  • jQuery

    5.6M sites

    jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.

  • core-js

    3.7M sitesOpen source

    core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.

  • jQuery Migrate

    2.4M sites

    Query Migrate is a javascript library that allows you to preserve the compatibility of your jQuery code developed for versions of jQuery older than 1.9.

  • jQuery UI

    1.8M sites

    jQuery UI is a collection of GUI widgets, animated visual effects, and themes implemented with jQuery, Cascading Style Sheets, and HTML.

  • Swiper

    1.7M sitesOpen source

    Swiper is a JavaScript library that creates modern touch sliders with hardware-accelerated transitions.

  • Lodash

    672.4K sites

    Lodash is a JavaScript library which provides utility functions for common programming tasks using the functional programming paradigm.

  • Slick

    667K sites

  • Modernizr

    617.2K sites

    Modernizr is a JavaScript library that detects the features available in a user's browser.

  • LazySizes

    609K sitesOpen source

    LazySizes is a JavaScript library used to delay the loading of images (iframes, scripts, etc) until they come into view.

  • OWL Carousel

    562.7K sites

    OWL Carousel is an enabled jQuery plugin that lets you create responsive carousel sliders.

  • FancyBox

    558.3K sites

    FancyBox is a tool for displaying images, html content and multi-media in a Mac-style 'lightbox' that floats overtop of web page.

  • Lightbox

    556.6K sitesOpen source

    Lightbox is small javascript library used to overlay images on top of the current page.

  • lit-html

    474.5K sitesOpen source

    lit-html is a simple, modern, safe, small and fast HTML templating library for JavaScript.

  • lit-element

    455.8K sitesOpen source

    lit-element is a simple base class for creating web components that work in any web page with any framework. lit-element uses lit-html to render into shadow DOM, and adds API to manage properties and attributes.

  • Underscore.js

    453.1K sites

    Underscore.js is a JavaScript library which provides utility functions for common programming tasks. It is comparable to features provided by Prototype.js and the Ruby language, but opts for a functional programming design instead of extending object prototypes.

  • Isotope

    440.6K sitesOpen source$ · Freemium · One-time

    Isotope.js is a JavaScript library that makes it easy to sort, filter, and add Masonry layouts to items on a webpage.

  • Moment.js

    419.6K sites

    Moment.js is a free and open-source JavaScript library that removes the need to use the native JavaScript Date object directly.

  • Select2

    391.4K sites

    Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.

  • Preact

    385.8K sitesOpen source

    Preact is a JavaScript library that describes itself as a fast 3kB alternative to React with the same ES6 API.

  • PhotoSwipe

    275.9K sitesOpen source

    PhotoSwipe is an open-source gallery to support JavaScript-based image zooming.

  • AOS

    230.6K sitesOpen source

    JavaScript library to animate elements on your page as you scroll.

  • Flickity

    208.3K sitesOpen source

    Flickity is a JavaScript slider library, built by David DeSandro of Metafizzy fame.

  • Hammer.js

    207K sites

    Hammer.js is a JavaScript library for adding touch gestures like swipe, pinch, and rotate to web applications.

  • prettyPhoto

    151.7K sites

  • SweetAlert2

    135.2K sitesOpen source

    SweetAlert2 is a JavaScript library that provides customisable, visually appealing, and responsive alert and modal dialog boxes for web applications.

  • YUI

    120.1K sitesOpen source

    YUI is a JavaScript and CSS library with more than 30 unique components including low-level DOM utilities and high-level user-interface widgets.

  • Splide

    113.3K sitesOpen source

    Splide.js is a lightweight, responsive, and customizable slider and carousel library for JavaScript.

  • Axios

    105.1K sites

    Promise based HTTP client for the browser and node.js

  • DataTables

    97.6K sitesOpen source

    DataTables is a plug-in for the jQuery Javascript library adding advanced features like pagination, instant search, themes, and more to any HTML table.

  • MobX

    75.6K sites

    Used byLinear

  • Clipboard.js

    75.2K sites

  • Tippy.js

    71.1K sitesOpen source

    Tippy.js is the complete tooltip, popover, dropdown, and menu solution for the web, powered by Popper.

  • Day.js

    46.8K sites

  • FingerprintJS

    44K sitesSaaSOpen sourcePay as you go

    FingerprintJS is a browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them.

  • web-vitals

    43.1K sitesOpen source

    The web-vitals JavaScript is a tiny, modular library for measuring all the web vitals metrics on real users.

  • SweetAlert

    41.5K sitesOpen source

    SweetAlert is a JavaScript library that provides alternative alert and modal dialog boxes for web applications, with customisable features, aiming to improve the user interface of the default browser dialogs.

  • Dropzone

    41.4K sitesSaaSOpen sourceFreemium · $ · Subscription

    Dropzone is a JavaScript library that turns any HTML element into a dropzone.

  • crypto-js

    40.4K sitesOpen source

    crypto-js is a JavaScript library of crypto standards.

  • Lenis

    36.6K sitesOpen source

    Lenis is a smooth scroll library to normalise the scrolling experience across devices.

  • Loadable-Components

    34.7K sitesOpen source

    Loadable-Components is a library to solve the React code-splitting client-side and server-side.

  • libphonenumber

    34K sitesOpen source

    libphonenumber is a JavaScript library for parsing, formatting, and validating international phone numbers.

  • Lozad.js

    30.8K sitesOpen source

    Lozad.js is a lightweight lazy-loading library that's just 535 bytes minified & gzipped.

  • Selectize

    29.5K sitesOpen source

    Selectize is an extensible jQuery-based custom <select> UI control.

  • Highlight.js

    29.4K sites

    Highlight.js is a JavaScript library for syntax highlighting, supporting 192 languages and 496 themes.

  • Apollo

    28.1K sites

    Apollo is a fully-featured caching GraphQL client with integrations for React, Angular, and more.

  • ScrollMagic

    27.5K sitesOpen source

    ScrollMagic is a jQuery plugin which essentially lets you use the scrollbar like a playback scrub control.

  • SoundManager

    27.1K sites

  • Glide.js

    26K sitesOpen source

    Glide.js is a dependency-free JavaScript ES6 slider and carousel.

Data from the open Wappalyzer database (enthec/webappanalyzer, GPL-3.0), updated every week. Site counts from the HTTP Archive (September 2026). Code tools (frameworks, build, ORMs…) come from a list kept by Faundr.