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.

  • A privacy-first API that predicts global consumer preferences Icon
    A privacy-first API that predicts global consumer preferences

    Qloo AI adds value to a wide range of Fortune 500 companies in the media, technology, CPG, hospitality, and automotive sectors.

    Through our API, we provide contextualized personalization and insights based on a deep understanding of consumer behavior and more than 575 million people, places, and things.
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  • SalesTarget.ai | AI-Powered Lead Generation, Email Outreach, and CRM Icon
    SalesTarget.ai | AI-Powered Lead Generation, Email Outreach, and CRM

    SalesTarget.ai streamlines your sales process, providing everything you need to find high- quality leads, automate outreach, and close deals faster

    SalesTarget is ideal for B2B sales teams, startup founders, and marketing professionals looking to streamline lead generation and outreach. It also benefits growing SaaS companies and agencies aiming to scale their outbound efforts efficiently.
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  • 1
    MIT License

    MIT License

    Hosted MIT License with details controlled through this repo

    The MIT License repository is a simple GitHub project that hosts the full text of the MIT License and provides a stable reference for developers who want to include permissive licensing details in their work. The MIT License itself is one of the most widely used open-source licenses because it allows reuse, modification, distribution, and even proprietary use, as long as copyright notices and license texts are preserved. This repository offers an easy way to copy the license text, understand its legal language, and see example usage in a context that is separate from any specific software project. It can also be useful for automated tooling and templates where a standard license file is needed across multiple repositories or as part of a code generation process. While not a software library or application, the repository serves an important role in open-source governance by centralizing a commonly adopted license with clear formatting.
    Downloads: 2 This Week
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  • 2
    MUI Core

    MUI Core

    React components for faster and easier web development

    MUI Core (formerly Material-UI) consists of React components for faster and easier web development, with options for creating your own design system or starting with Material design. MUI components work without any additional setup, and don't pollute the global scope.
    Downloads: 2 This Week
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  • 3
    Moment.js

    Moment.js

    Parse, validate, manipulate, and display dates in javascript

    Moment is a JavaScript date and time library that simplifies parsing, formatting, arithmetic, and humanizing of dates. It supports many formats in input and output, internationalization (i18n), locale-based month/day names, relative time (for example, “3 days ago”), and chaining of operations (adding, subtracting, diffing). Developers often use it for calendar displays, scheduling, and manipulating times across time zones or daylight saving transitions. While it makes working with date strings convenient, moment maintains internal mutability, which has trade-offs with safety and chainability. Over time, newer alternatives with immutable and modular designs have emerged, but moment remains widely known and integrated in many legacy projects. Its comprehensive feature set and ease of use made it a standard for date-time handling in JavaScript for many years.
    Downloads: 2 This Week
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  • 4
    NOTY

    NOTY

    NOTY is a dependency-free notification library

    NOTY is a notification library that makes it easy to create alert - success - error - warning - information - confirmation messages as an alternative the standard alert dialog. There are lots of other options in the API to customize the text, animation, buttons, and much more. It also has various callbacks for the buttons, opening closing the notifications, and queue control. Dependency-free notification library that makes it easy to create alert - success - error - warning - information - confirmation messages as an alternative to the standard alert dialog.
    Downloads: 2 This Week
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  • Powerful Website Security | Continuous Web Threat Platform Icon
    Powerful Website Security | Continuous Web Threat Platform

    Continuously detect, prioritize, and validate web threats to quickly mitigate security, privacy, and compliance risks.

    Reflectiz is a comprehensive web exposure management platform that helps organizations proactively identify, monitor, and mitigate security, privacy, and compliance risks across their online environments. Designed to address the growing complexity of modern websites, Reflectiz provides full visibility and control over first, third, and even fourth-party components, such as scripts, trackers, and open-source libraries that often evade traditional security tools.
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  • 5
    NiL.JS

    NiL.JS

    JavaScript engine for .NET written in C#

    NiL.JS is a JavaScript engine written in C#, capable of executing ECMAScript 6.0 (ES2015) code. It allows embedding JavaScript execution within .NET applications, providing a bridge between C# and JavaScript.​
    Downloads: 2 This Week
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  • 6
    Node Binance API

    Node Binance API

    Node Binance API is an asynchronous node.js library

    This project is designed to help you make your own projects that interact with the Binance API. You can stream candlestick chart data, market depth, or use other advanced features such as setting stop losses and iceberg orders. This project seeks to have complete API coverage including WebSockets.
    Downloads: 2 This Week
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  • 7
    Node Crawler

    Node Crawler

    Web Crawler/Spider for NodeJS + server-side jQuery

    Most powerful, popular and production crawling/scraping package for Node, happy hacking.
    Downloads: 2 This Week
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  • 8
    Node RDKafka

    Node RDKafka

    Node.js bindings for librdkafka

    A high-performance Node.js client for Apache Kafka, built on top of librdkafka, providing bindings for efficient Kafka message processing.
    Downloads: 2 This Week
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  • 9
    Pattern Lab Node

    Pattern Lab Node

    The Node version of Pattern Lab

    This monorepo contains the core of Pattern Lab / Node and all related engines, UI kits, plugins, and utilities. Pattern Lab helps you and your team build thoughtful, pattern-driven user interfaces using atomic design principles.
    Downloads: 2 This Week
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  • Accounting practice management software Icon
    Accounting practice management software

    Accountants, accounting firms, tax attorneys, tax professionals

    Canopy is a cloud-based practice management software for accounting and tax firms, offering tools for client engagement, document management, workflow automation, and time & billing. Its Client Engagement platform centralizes interactions with a secure portal, customizable branding, and email integration, while the Document Management system enables organized, paperless file storage. The Workflow module enhances visibility into tasks and projects through templates, task assignments, and automation, reducing human error. Additionally, the Time & Billing feature tracks billable hours, generates invoices, and processes payments, ensuring accurate financial management. With its comprehensive features, Canopy streamlines operations, reduces stress, and enhances client experiences.
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  • 10
    Phaser Raycaster

    Phaser Raycaster

    Raycasting plugin for Phaser 3

    Phaser Raycaster is a plugin for Phaser 3 that implements raycasting functionality, enabling developers to simulate visibility, lighting, and field-of-view mechanics in their games.
    Downloads: 2 This Week
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  • 11

    Polymer

    A Web Component library

    Polymer is a lightweight Web Components library that lets you create encapsulated Web Components that work just like standard HTML elements. These elements can be used in building web applications and are reusable. Polymer can be particularly useful when building UI components. Instead of having to constantly rebuild components such as a specific navigation bar or button in different frameworks and for different projects, simply define this component once with Polymer, and you can use it again and again in your future projects. Because Polymer is built on top of the web standards-based Web Components APIs, custom HTML elements made from it are built totally from the platform up and are interoperable across frameworks. Polymer also works across all major browsers.
    Downloads: 2 This Week
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  • 12
    PrimeVue

    PrimeVue

    Next Generation Vue UI Component Library

    PrimeVue is a full-featured UI component suite for Vue.js that provides developers with a rich set of customizable components, templates, and design resources for building modern web applications. It is part of the broader Prime ecosystem, which includes similar libraries for other frameworks, and is designed to maximize developer productivity through reusable UI building blocks. The library offers dozens of components covering common interface needs such as forms, data tables, charts, navigation, and layout systems, along with advanced features like accessibility compliance and responsive design. PrimeVue supports both styled and unstyled modes, allowing developers to either use built-in themes or fully customize the appearance using external CSS frameworks like Tailwind. Its architecture includes a monorepo structure with modular packages for core functionality, icons, themes, and integrations with tools like Nuxt.
    Downloads: 2 This Week
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  • 13
    React Native for Web

    React Native for Web

    React Native Components and APIs for the Web

    React Native for Web is an accessible implementation of React Native's Components and APIs that is interoperable with React DOM. Accessible HTML. Support different devices and input modes, render semantic tags. High-quality interactions. Support gestures and multiple input modes (touch, mouse, keyboard). Reliable styles. Rely on scoped styles and automatic vendor-prefixing. Support RTL layouts. Responsive containers. Respond to element resize events. Incremental adoption. Interoperates with existing React DOM components. Bundle only what you use. React Native for Web is used in production web apps by Twitter, Flipkart, Uber, Major League Soccer, and many others. It also powers web support in multi-platform React projects such as Expo, React Native Elements, React Native Paper, and React Native Base.
    Downloads: 2 This Week
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  • 14
    React Rainbow

    React Rainbow

    React Rainbow Components. Build your web application in a snap

    React Rainbow is a collection of components that will reliably help you build your application in a snap. Give it a hack and let us know what you think. We designed each component with i18n in mind. Any new component or feature we may add in the future has to be able to work fully in different locales. Proper documentation based on interactive examples to help you understand the features of each component. We know how important it for you is to test your UI. Our npm package provides a webdriver.io page object for almost every component. Our components are test infected. We like to test our components as much as possible.
    Downloads: 2 This Week
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  • 15
    React-WeUI

    React-WeUI

    WeUI Components build with React

    React-WeUI is a React component library that brings WeUI, the interface system associated with WeChat-style mobile design, into the React development workflow. Its purpose is to let developers build mobile-oriented interfaces with React while preserving the visual language and component behavior expected from WeUI. The project combines React components with the underlying WeUI styling, which means teams can work in a modern component architecture instead of manually stitching together markup and CSS for each screen. The repository includes documentation with live examples, installation options for both package managers and browser-based usage, and example code that shows how quickly a page can be assembled from imported components. Because of its heritage, React-WeUI is especially relevant for mobile web experiences, lightweight app-like pages, and products targeting users familiar with WeChat-inspired interaction patterns.
    Downloads: 2 This Week
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  • 16
    Rollup

    Rollup

    A module bundler for JavaScript

    Rollup is a module bundler for JavaScript which compiles small pieces of code into something larger and more complex, such as a library or application. It uses the new standardized format for code modules included in the ES6 revision of JavaScript, instead of previous idiosyncratic solutions such as CommonJS and AMD. ES modules let you freely and seamlessly combine the most useful individual functions from your favorite libraries. This will eventually be possible natively everywhere, but Rollup lets you do it today. Rollup can be used either through a command line interface with an optional configuration file, or else through its JavaScript API. Rollup allows you to write your code using the new module system, and will then compile it back down to existing supported formats such as CommonJS modules, AMD modules, and IIFE-style scripts. This means that you get to write future-proof code.
    Downloads: 2 This Week
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  • 17
    State Transition Plugin for Phaser

    State Transition Plugin for Phaser

    State transition plugin for Phaser.js

    Phaser State Transition is a plugin that facilitates smooth transitions between game states in Phaser. It allows developers to define custom animations and easing functions when switching scenes, enhancing the visual flow of games.
    Downloads: 2 This Week
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  • 18
    SuperAgent

    SuperAgent

    Ajax for Node.js and browsers (JS HTTP client)

    SuperAgent is light-weight progressive ajax API crafted for flexibility, readability, and a low learning curve after being frustrated with many of the existing request APIs. It also works with Node.js! Small progressive client-side HTTP request library, and Node.js module with the same API, supporting many high-level HTTP client features. Browser-ready versions of this module are available via jsdelivr, unpkg, and also in the node_modules/superagent/dist folder in downloads of the superagent package. If you are using browserify, webpack, rollup, or another bundler, then you can follow the same usage as Node. SuperAgent is easily extended via plugins. The Node client supports making requests to Unix Domain Sockets. DELETE, HEAD, PATCH, POST, and PUT requests can also be used, simply change the method name. Absolute URLs can be used. In web browsers absolute URLs work only if the server implements CORS.
    Downloads: 2 This Week
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  • 19
    TailAdmin

    TailAdmin

    Free and Open-source Tailwind CSS Dashboard Admin Template

    TailAdmin is a free and open source admin dashboard template built with Tailwind CSS, designed to help developers quickly create data-driven web applications and backend interfaces. It provides a complete starting point for dashboards, including prebuilt pages, layouts, and UI components that are commonly required in admin panels and control systems. The template is built using a combination of HTML, Tailwind CSS, Alpine.js, and modern build tools, making it lightweight while still offering interactive functionality. TailAdmin includes essential features such as charts, tables, authentication forms, and navigation components, enabling developers to assemble full dashboards without starting from scratch. It also supports multiple frameworks, including React, Next.js, Vue, Angular, and Laravel, making it highly adaptable to different development stacks. With responsive design and dark mode support built in, it ensures usability across devices and environments.
    Downloads: 2 This Week
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  • 20
    Textillate.js

    Textillate.js

    A jquery plugin for CSS3 text animations

    Textillate.js combines some awesome libraries to provide an easy-to-use plugin for applying CSS3 animations to any text. Simply include textillate.js and it's dependencies in your project to start creating unique effects. Textillate.js is built on top of the simple, yet amazingly powerful animate.css and lettering.js libraries.
    Downloads: 2 This Week
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  • 21
    Typed.js

    Typed.js

    A JavaScript typing animation library

    Typed.js is a library that types. Enter in any string, and watch it type at the speed you've set, backspace what it's typed, and begin a new sentence for however many strings you've set. Rather than using the strings array to insert strings, you can place an HTML div on the page and read from it. This allows bots and search engines, as well as users with JavaScript disabled, to see your text on the page. You can pause in the middle of a string for a given amount of time by including an escape character. CSS animations are built upon initialization in JavaScript. But, you can customize them at your will!
    Downloads: 2 This Week
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  • 22
    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: 2 This Week
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  • 23
    VvvebJs

    VvvebJs

    Drag and drop website builder javascript library

    Drag and drop website builder javascript library. Components and blocks/snippets drag and drop. Undo/Redo operations. One or two panels interface. File manager and component hierarchy navigation. Add a new page. Live code editor. Image upload with example PHP script included. Page download or export HTML or save the page on the server with example PHP script included. Components/Blocks list search. Bootstrap 4 components. Youtube, Google maps, Charts.js, etc widgets. By default, the editor comes with Bootstrap 4 and Widgets components and can be extended with any kind of components and inputs.
    Downloads: 2 This Week
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  • 24
    Zebra Datepicker

    Zebra Datepicker

    Super-lightweight, highly configurable, cross-browser date time picker

    A super-lightweight, highly configurable, cross-browser date time picker jQuery plugin. Enhance your forms with the powerful and highly-configurable Zebra Datepicker date time picker jQuery plugin. This date time picker adds an intuitive calendar interface for selecting dates and times, complete with a convenient month and year jump feature. The selected date will be formatted and entered into the input field according to your specified options. Simply attach the plugin to your input fields and let the calendar icon do the rest.
    Downloads: 2 This Week
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  • 25
    bootstrap-validate

    bootstrap-validate

    A simple Form Validation Utility for Bootstrap 3, Bootstrap 4

    A simple Form Validation Utility for Bootstrap 3, Bootstrap 4 for Humans.
    Downloads: 2 This Week
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