Browse free open source JavaScript Libraries and projects below. Use the toggles on the left to filter open source JavaScript Libraries by OS, license, language, programming language, and project status.

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  • 1
    Unus is a framework that gives developers a powerful, simple to use tool, with many advanced features that are seen in enterprise level applications.
    Downloads: 0 This Week
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  • 2
    Validation Library

    Validation Library

    Validation library for node.js

    Validation library for node.js. NIV (Node Input Validator) is a validation library for node.js. You can also extend library to add custom rules. For use cases of any rule, please check test cases, If you have any doubt or confusion with documentation or rule behavior.
    Downloads: 0 This Week
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  • 3
    VenoBox

    VenoBox

    Responsive jQuery lightbox plugin

    Responsive modal window javaScript plugin, touch swipe gallery. Just another responsive lightbox plugin, suitable for images, inline content, iFrames, and videos. The big difference compared to many other plugins is that VenoBox calculates the max width of the image displayed and preserves its height if is taller than the window (so in small devices you can scroll down the content, avoiding vertical microscopic resized images).
    Downloads: 0 This Week
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  • 4
    Venom

    Venom

    Venom is the most complete javascript library for Whatsapp

    Venom is a high-performance system developed with JavaScript to create a bot for WhatsApp, support for creating any interaction, such as customer service, media sending, sentence recognition based on artificial intelligence and all types of design architecture for WhatsApp. It's a high-performance alternative API to whatzapp, you can send, text messages, files, images, videos and more. Remember, the API was developed on a platform called RESTful Web services, providing interoperability between computer systems on the Internet. It uses a set of well-defined operations that apply to all information resources, HTTP itself defines a small set of operations, the most important being post, get, put and delete. Use it in your favorite language like PHP, Python, C# and others. as long as your language is supported with the HTTP protocol, you will save time and money. you don't need to know how Venom works, we have the complete API documentation, in a professional way!
    Downloads: 0 This Week
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  • 5
    Viewer

    Viewer

    A simple jQuery image viewing plugin. As of v1.0.0

    A simple jQuery image viewing plugin. As of v1.0.0, the core code of Viewer is replaced with Viewer.js.
    Downloads: 0 This Week
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  • 6
    VisualKeys is a visual approach to keyboard shortcuts. It's a jQuery plugin that give users an alternative way to control web applications without a mouse. No need to remember every key to every shortcut. On a simple keypress displays a menu.
    Downloads: 0 This Week
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  • 7
    VivaGraph

    VivaGraph

    Graph drawing library for JavaScript

    VivaGraphJS is a powerful, high-performance graph drawing library for JavaScript that enables developers to visualize complex networks directly in the browser or in Node.js environments. It is designed for speed and scalability, handling large graph datasets with smooth rendering and interactive capabilities such as dragging nodes and zooming. The library supports multiple rendering backends including SVG, WebGL, and Canvas, allowing developers to choose the best balance of performance and visual fidelity for their use case. Its layout algorithms help position nodes in aesthetically pleasing arrangements using force-directed simulations that adjust dynamically as the graph evolves. VivaGraphJS is modular, so you can extend or customize layouts, rendering, and interaction logic to fit specialized applications such as social network analysis, dependency mapping, or knowledge graphs.
    Downloads: 0 This Week
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  • 8
    Vivus.js

    Vivus.js

    JavaScript library to make drawing animation on SVG

    Vivus is a lightweight JavaScript class (with no dependencies) that allows you to animate SVGs, giving them the appearence of being drawn. There are a variety of different animations available, as well as the option to create a custom script to draw your SVG in whatever way you like. Every path element is drawn at the same time with a small delay at the start. This is currently the default animation. Each line is drawn synchronously. They all start and finish at the same time, hence the name `sync`. Each path element is drawn one after the other. This animation gives the best impression of live drawing. To give more freedom, it's possible to override the animation of each path and/or the entire SVG. It works a bit like the CSS animation timing function. But instead of using a cubic-bezier function, it use a simple JavaScript function. It must accept a number as parameter (between 0 to 1), then return a number (also between 0 and 1). It's a hook.
    Downloads: 0 This Week
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  • 9
    Vue.js modal

    Vue.js modal

    Easy to use, highly customizable Vue.js modal library

    Easy to use, highly customizable Vue.js modal library. This library is contributor-driven. It is not backed by any company, which means that all contributions are voluntary and done by the people who need them. If you need something improved, added, or fixed, please contribute it yourself. Please keep in mind that maintainers volunteer their free time to work on this project and have no obligation to reply on the issues, tailor library for specific use-cases or perform customer support. Dialog is a simplified version of the modal which has most parameters set by default and is useful for quick prototyping, alerts, etc. Dialog is merely an example of how easy it is to create modals that fit your project needs. Nevertheless, you can use it if you set dialog, true in plugin configuration. In order to instantiate modals at runtime (for lazy-loading or de-cluttering templates), it is possible to create modals dynamically.
    Downloads: 0 This Week
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  • 10
    VuePress

    VuePress

    Minimalistic Vue-powered static site generator

    Simplicity First. Minimal setup with markdown-centered project structure helps you focus on writing. Vue-Powered. Enjoy the dev experience of Vue + webpack, use Vue components in markdown, and develop custom themes with Vue. Performant. VuePress generates pre-rendered static HTML for each page, and runs as an SPA once a page is loaded. The fastest way to get your VuePress project setup is to use our create-vuepress-site generator which will help scaffold the basic VuePress site structure for you. You will then have the opportunity to configure your VuePress site’s metadata such as: project name, description, maintainer email, maintainer name, repository URL, etc.
    Downloads: 0 This Week
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  • 11
    Vuex

    Vuex

    Centralized State Management for Vue.js

    Vuex is a centralized state management pattern and library for Vue.js applications. It stores all the components in an application following rules that ensure the state is only mutated in a predictable manner. Unlike other management patterns, Vuex defines and separates the concepts involved in state management, and enforces rules that maintain independence between views and states. It is also a library implementation that's specifically tailored for Vue.js, so as to take advantage of its granular reactivity system for efficient updates. Vuex is ideal for building a medium-to-large-scale SPA, as it is better at handling state outside of Vue components.
    Downloads: 0 This Week
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  • 12
    WIComponents

    WIComponents

    UI components for apache wicket

    The „wicket components“ project is a component library for the apache wicket web-framework. Referring to classic component libraries for desktop applications ( like Microsoft Foundation Classes, QT Library or wxWindows) the wicket components provide graphical user interface components for wicket web-applications. Based upon this library it'll be easy to create complex user interfaces for data processing applications and it is a perfect start to migrate old desktop applications to modern web-applications. The project is getting bigger and bigger. Your help is greatly appreciated.
    Downloads: 0 This Week
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  • 13

    WSCreator

    Java library for automated Soap & Rest web Services Creation

    An awesome new way of adding SOAP and REST web services to any Spring IOC based Java project in minimum time. This library takes out all the pain part of implementing Soap & Rest Web Services specific code from developer's plate and does it in a very smart way. All you need to do is add dependency of this library to your project, add some annotations to your interfaces, add a servlet entry into your web.xml. & you are all set to go. Library uses Apache CXF to create SOAP based web services & for REST it uses Spring MVC. All the dynamic code is written at boot time. This library reduces precious development time & developers can actually focus on writing business code & other project specific stuff. See implementation details: http://sourceforge.net/projects/ws-creator/files/ Demo Application: http://sourceforge.net/p/wscreatordemo Central Repository link: http://search.maven.org/#search%7Cga%7C1%7Cwscreator
    Downloads: 0 This Week
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  • 14
    WTFJS

    WTFJS

    A list of funny and tricky JavaScript examples

    WTFJS is a curated collection of JavaScript “gotchas” and puzzling examples that reveal surprising corners of the language. Each entry presents a small snippet, explains why the behavior occurs, and ties it back to the specification or engine rules. The repository covers coercion quirks, edge-case comparisons, floating-point oddities, prototype traps, and scoping pitfalls, among others. It’s designed as both a fun read and a serious learning aid, helping developers build an intuition for how JavaScript evaluates expressions. By highlighting common misconceptions, it encourages safer coding patterns and more reliable mental models. Teachers, interviewers, and learners use it to spark discussion and deepen understanding of JavaScript’s semantics.
    Downloads: 0 This Week
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  • 15
    WWWBasic

    WWWBasic

    wwwBASIC is an implementation of BASIC that runs on Node.js & the Web

    wwwBASIC is a JavaScript-based implementation of the classic BASIC programming language designed to run seamlessly in web browsers and Node.js environments. Created by Google, it allows developers and enthusiasts to write and execute BASIC programs directly within HTML pages or via command-line tools. The interpreter compiles BASIC source code into JavaScript at load time, enabling efficient execution within modern web environments without requiring external emulators or plugins. It supports traditional BASIC constructs such as loops, conditionals, and I/O operations, along with 24-bit color graphics functions (PSET, LINE, CIRCLE) and input handling (INKEY$, GETMOUSE). wwwBASIC brings retro programming into the modern web era, making it ideal for educational purposes, historical software preservation, and interactive demonstrations
    Downloads: 0 This Week
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  • 16
    Weaponised XSS Payloads

    Weaponised XSS Payloads

    XSS payloads designed to turn alert(1) into P1

    Weaponised XSS Payloads is an open-source collection of JavaScript examples designed to demonstrate the security impact of cross-site scripting vulnerabilities. It focuses on showing how seemingly limited script injection issues can lead to serious consequences in web applications. The repository includes proof-of-concept scripts targeting popular content management systems, including WordPress, Drupal, Joomla, and MyBB. Examples illustrate risks involving unauthorized administrative actions, content modification, and account compromise. It also includes templates for staged payload execution and iframe-based interactions. Security researchers can study these examples to understand exploitation paths and document vulnerabilities during authorized assessments. The project accompanies educational material about evaluating XSS severity. It is a collection of testing resources rather than an automated vulnerability scanner.
    Downloads: 0 This Week
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  • 17

    WebMod

    Web Module Audio Player

    This project has been moved to github: https://github.com/tenry92/webmod
    Downloads: 0 This Week
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  • 18
    WebRTC-Experiment

    WebRTC-Experiment

    WebRTC, WebRTC and WebRTC. Everything here is all about WebRTC

    WebRTC-Experiment is a large collection of WebRTC demos, libraries, examples, and browser communication experiments by Muaz Khan. It covers many real-time communication patterns, including audio calls, video calls, screen sharing, file sharing, media streaming, broadcasting, and collaborative tools. The repository acts as a catalog of related projects rather than one narrow library. It links together tools such as RecordRTC, MultiStreamsMixer, DetectRTC, RTCMultiConnection, scalable broadcasting, Canvas Designer, and Translator. Developers can study the examples to understand WebRTC APIs, signaling patterns, browser support, device detection, and peer-to-peer behavior. It is useful for prototyping browser-based communication apps and learning practical WebRTC implementation ideas.
    Downloads: 0 This Week
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  • 19
    Webiness

    Webiness

    Lightweight PHP framework

    Webiness is lightweight PHP framework based on MVC design pattern. It has a very straightforward installation process that requires only a minimal configuration, so it can save you a lot of hassle. Also, it canbe an ideal choice if you want to avoid PHP version conflict, as it works on all PHP versions from 5.3. Webiness extensively uses the lazy loading technique so, in most cases, it is faster then other frameworks. It can be used for rapid prototyping of web applications. Webiness is integrated with jQuery, and it comes with a set of AJAX-enabled features and his own light CSS framework for frontend development. Trying to be secure, it has integrated authetification and authorization module, RBAC user interface, sessions expire feature, input validation, CSRF protection, SQL injection prevention and other security features.
    Downloads: 0 This Week
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  • 20
    Webpack library starter

    Webpack library starter

    Webpack based boilerplate for producing libraries

    Webpack library starter is a boilerplate project for building JavaScript or TypeScript libraries with Webpack. It is designed for authors who want to publish reusable packages without setting up the build pipeline from scratch. The starter accepts ES6 or TypeScript source code and outputs a universal library format that can work across different JavaScript environments. It includes a Jest test setup so library behavior can be verified during development. The project is useful for small utilities, shared browser libraries, and packages that need a predictable publishing foundation. It is best viewed as a practical starting template rather than a full framework, giving developers structure while leaving room for customization.
    Downloads: 0 This Week
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  • 21
    Webshim

    Webshim

    Webshims Lib is a modular capability-based polyfill-loading library

    Webshim is a deprecated modular polyfill-loading library created to help developers use HTML5 features across browsers with inconsistent native support. It was designed around capability detection, meaning it loads only the needed polyfills instead of treating every browser the same. The library was especially useful when older browsers lacked reliable support for modern form controls, media elements, and other HTML5 APIs. It helped front-end developers build more consistent user experiences during a period when browser support varied widely. The project depends on the older JavaScript ecosystem and is not compatible with newer jQuery 3.x workflows. Today, it is best understood as a legacy compatibility tool for older web projects rather than a modern front-end dependency.
    Downloads: 0 This Week
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  • 22
    Workbox

    Workbox

    JavaScript libraries for Progressive Web Apps

    Workbox is a set of libraries that can power a production-ready service worker for your Progressive Web App. Stop waiting on the network! You can improve your web app's performance by caching and serving your files, powered by a service worker. Even on an unreliable connection, your web app can still work using the right runtime caching strategies. Looking to build a progressive web app? Workbox makes it easy to create an offline first experience. Workbox is a library that bakes in a set of best practices and removes the boilerplate every developer writes when working with service workers. Precaching, runtime caching, strategies, request routing, background sync, and helpful debugging. Wish you could rely on Google Fonts being available offline after the user has visited your site? Add a quick rule to serve them from the cache. Make your JS and CSS fast by returning the assets from the cache, while making sure they are updated in the background for the next use.
    Downloads: 0 This Week
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  • 23
    XDomain

    XDomain

    A pure JavaScript CORS alternative

    XDomain is a JavaScript library designed to enable cross-domain communication in web applications, addressing limitations imposed by the browser’s same-origin policy. It provides a simple API for making cross-origin requests, allowing developers to interact with external resources without requiring complex server-side configurations. The library works by creating a proxy mechanism that facilitates communication between different domains in a secure and controlled manner. It is particularly useful for legacy environments where modern solutions like CORS may not be fully supported or easily configurable. XDomain emphasizes compatibility and ease of integration, making it suitable for a wide range of web applications that need to communicate across domains. Its lightweight design ensures minimal impact on performance while still providing the necessary functionality for cross-domain requests.
    Downloads: 0 This Week
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  • 24
    JSP tag library for the YAV javascript validation tool. It provides automatic client-side and server-side validation by using simple validation tags.
    Downloads: 0 This Week
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  • 25
    You (Might) Don't Need jQuery

    You (Might) Don't Need jQuery

    Examples of how to do query, style, dom, ajax, event etc like jQuery

    You Don’t Need jQuery is a practical reference that maps common jQuery patterns to modern native JavaScript alternatives. It explains how current browser APIs can handle many tasks that once required jQuery. The guide covers selectors, CSS and style changes, DOM manipulation, Ajax, events, utility helpers, promises, animation, and browser support. It is written for developers who maintain older front-end code or want to reduce dependency weight in newer projects. The project also makes clear that jQuery is still valid in many cases, so the goal is guidance rather than blanket replacement. Its translated versions make the material accessible to a wide international developer audience.
    Downloads: 0 This Week
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