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.

  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

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  • 1
    Jspreadsheet CE

    Jspreadsheet CE

    Javascript plugin to create web-based tables & spreadsheets

    Jspreadsheet CE is a lightweight Vanilla JavaScript data grid plugin to create amazing web-based interactive HTML tables, and spreadsheets compatible data grid with other spreadsheet software. You can create an online spreadsheet table from a JS array, JSON, CSV or XSLX files. You can copy from excel and paste straight to your Jspreadsheet CE spreadsheet and vice versa. It is very easy to integrate any third party JavaScript plugins to create your own custom columns, custom editors, and customize any feature into your application. Jspreadsheet CE has plenty of different input options through its native column types to cover the most common web-based application requirements. It is a complete solution for web data management. Create amazing applications with Jspreadsheet CE JavaScript spreadsheet.
    Downloads: 1 This Week
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  • 2
    Kendo UI Core

    Kendo UI Core

    An HTML5, jQuery-based widget library for building modern web apps

    Kendo UI is everything you need to build sites and apps with HTML5 & JavaScript. Kendo UI Core is the free and open-source version of Kendo UI that provides access to the web's best UI widgets and key framework features, essential for developing great experiences for the web and mobile. Kendo UI Core is a free and open-source subset of Kendo UI. The following table details the widgets and features available in Kendo UI Core, as well as the additional features available via a commercial Kendo UI license.
    Downloads: 1 This Week
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  • 3
    LIEF

    LIEF

    LIEF - Library to Instrument Executable Formats (C++, Python, Rust)

    LIEF (Library to Instrument Executable Formats) is a cross-platform library that enables parsing, modifying, and abstracting executable formats such as ELF, PE, and Mach-O. It's widely used in reverse engineering and binary analysis.​
    Downloads: 1 This Week
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  • 4
    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: 1 This Week
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  • Forever Free Full-Stack Observability | Grafana Cloud Icon
    Forever Free Full-Stack Observability | Grafana Cloud

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  • 5
    Mousetrap

    Mousetrap

    Simple library for handling keyboard shortcuts in Javascript

    Mousetrap is a standalone library with no external dependencies. It weighs in at around 2kb minified and gzipped and 4.5kb minified. Mousetrap has been tested and should work in Internet Explorer 6+, Safari, Firefox, and Chrome. The bind method is the main call you will be making. This will bind a specified keyboard command to a callback method. If you want to bind multiple key commands to the same callback you can pass in an array for the first argument. Mousetrap 1.4 introduced a generic mod helper which lets you set cross platform shortcuts. The sequence of keys feature was inspired by Gmail. Any keys separated by a space will be considered a sequence. If you type each key in order the final one in the sequence will trigger the callback. If you type a key not in the sequence or wait too long the sequence will reset. You can also make a sequence that includes key combinations within it.
    Downloads: 1 This Week
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  • 6
    NN-SVG

    NN-SVG

    Publication-ready NN-architecture schematics

    Illustrations of Neural Network architectures are often time-consuming to produce, and machine learning researchers all too often find themselves constructing these diagrams from scratch by hand. NN-SVG is a tool for creating Neural Network (NN) architecture drawings parametrically rather than manually. It also provides the ability to export those drawings to Scalable Vector Graphics (SVG) files, suitable for inclusion in academic papers or web pages. The tool provides the ability to generate figures of three kinds: classic Fully-Connected Neural Network (FCNN) figures, Convolutional Neural Network (CNN) figures of the sort introduced in the LeNet paper, and Deep Neural Network figures following the style introduced in the AlexNet paper. The former two are accomplished using the D3 javascript library and the latter with the javascript library Three.js. NN-SVG provides the ability to style the figure to the user's liking via many size, color, and layout parameters.
    Downloads: 1 This Week
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  • 7
    NoteDiscovery

    NoteDiscovery

    Your Self-Hosted Knowledge Base

    NoteDiscovery delivers a self-hosted knowledge base and note-taking platform that empowers individuals and teams to create, organize, and explore their notes locally, giving complete control over their data without relying on commercial services. It emphasizes lightweight performance and privacy, storing notes as plain markdown files that can be easily managed, synced, or version controlled while keeping everything on your own server. The interface is modern and responsive, offering themes, tags, interactive note browsing, and visualization tools like graph views for connected ideas, which makes it suitable for personal “second brain” systems or team wikis. Users benefit from features like fast search, outline navigation, favorites, and plugin extensibility, and the platform works well across devices thanks to its responsive design.
    Downloads: 1 This Week
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  • 8
    Prism

    Prism

    Lightweight, robust, elegant syntax highlighting

    Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind. It’s used in millions of websites, including some of those you visit daily.
    Downloads: 1 This Week
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  • 9
    Pusher Channels Javascript Client

    Pusher Channels Javascript Client

    Pusher Javascript library

    Bi-directional hosted APIs that are flexible, scalable and easy to use. We create and maintain complex messaging infrastructure so you can build the realtime features your users need, fast.
    Downloads: 1 This Week
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  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

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  • 10
    React Slick

    React Slick

    React carousel component

    This library is the port of jQuery slick library. React slick is a carousel component built with React. It is a react port of slick carousel. The easiest way to try out react-slick is using the Code Sandbox example. After you are done installing through yarn or npm, now you will have to include CSS in your project. But be aware slick-carousel has a peer-dependancy on jQuery which you, or your colleagues may not like to see in your console output, so you can always grab the CSS from there and convert it into any CSS in JS solution that you might be using.
    Downloads: 1 This Week
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  • 11
    Remote Jobs

    Remote Jobs

    A list of semi to fully remote-friendly companies (jobs) in tech

    Remote Jobs is a community-curated, open source repository that lists companies around the world that support remote work. Each entry describes a company, whether it’s fully remote or partially remote, what regions they hire in, and links to their career pages. The repo serves as a living directory for job seekers looking for remote-friendly employers and for companies wishing to be listed. Contributions are encouraged via pull requests, with guidelines to keep information accurate and up to date.
    Downloads: 1 This Week
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  • 12
    Retire.js

    Retire.js

    Scanner detecting the use of JavaScript libraries

    There is a plethora of JavaScript libraries for use on the web and in node.js apps out there. This greatly simplifies, but we need to stay updated on security fixes. "Using Components with Known Vulnerabilities" is now a part of the OWASP Top 10 and insecure libraries can pose a huge risk for your web app. The goal of Retire.js is to help you detect the use of versions with known vulnerabilities. Scan a web app or node app for use of vulnerable JavaScript libraries and/or node modules. grunt-retire scans your grunt-enabled app for use of vulnerable JavaScript libraries and/or node modules. Scans visited sites for references to insecure libraries and puts warnings in the developer console. An icon on the address bar displays will also indicate if vulnerable libraries were loaded. Retire.js has been adapted as a plugin for the penetration testing tools Burp and OWASP ZAP.
    Downloads: 1 This Week
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  • 13
    Spectacle

    Spectacle

    A ReactJS based Presentation Library

    Spectacle is an open source presentation library based on React.js. It lets you create sleek presentations using JSX syntax, giving you the ability to live demo your code. Spectacle’s presentations are lively and interactive, with clickable elements, themes, custom backgrounds, animations, and many other fun and unique elements you can add to make your presentations pop. With Spectacle you can also live demo your code in real time without having to leave the presentation deck. Code blocks conveniently auto-size and scroll when there is an overflow of content. See the live demo deck at: https://raw.githack.com/FormidableLabs/spectacle/main/examples/one-page.html
    Downloads: 1 This Week
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  • 14
    SurveyJS

    SurveyJS

    JavaScript Survey and Form Library

    SurveyJS Form Library is distributed as npm packages and as scripts and style sheets that you can reference on your page. You can use it in any React, Angular, Vue, Knockout, or jQuery application. React, Angular, Knockout, and Vue3 are supported natively. To communicate with the server, the libraries use JSON objects that represent form schemas (content and layout of a form) and form results (answers). You have the option to build dynamic JSON-driven forms using our free full-featured form builder demo available on the website. Alternatively, you can integrate the form builder library and create forms using a drag-and-drop UI directly within your own application. With years of development and support behind us, we've assisted hundreds of companies across various industries. With Survey, you can create nearly anything that popular cloud services offer. Furthermore, our library is fully extensible, allowing you to modify its behavior to suit your specific needs.
    Downloads: 1 This Week
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  • 15
    bignumber.js

    bignumber.js

    A JavaScript library for arbitrary-precision decimal arithmetic

    bignumber.js is a JavaScript library for arbitrary-precision decimal and non-decimal arithmetic. Faster, smaller, and perhaps easier to use than JavaScript versions of Java's BigDecimal. Replicates the toExponential, toFixed, toPrecision and toString methods of JavaScript's Number type. Includes a toFraction and a correctly-rounded squareRoot method. Supports cryptographically secure pseudo-random number generation. Wide platform compatibility, uses JavaScript 1.5 (ECMAScript 3) features only. If a smaller and simpler library is required see big.js. It's less than half the size but only works with decimal numbers and only has half the methods. It also has fewer configuration options than this library, and does not allow NaN or Infinity. See also decimal.js, which among other things adds support for non-integer powers, and performs all operations to a specified number of significant digits.
    Downloads: 1 This Week
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  • 16
    chatgpt.js

    chatgpt.js

    A powerful, open source client-side JavaScript library for ChatGPT

    A powerful client-side JavaScript library for ChatGPT. chatgpt.js is a powerful JavaScript library that allows for super easy interaction w/ the ChatGPT DOM. chatgpt.js was written w/ ultra flexibility in mind.
    Downloads: 1 This Week
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  • 17
    glMatrix

    glMatrix

    Javascript Matrix and Vector library for High Performance WebGL apps

    Javascript has evolved into a language capable of handling realtime 3D graphics, via WebGL, and computationally intensive tasks such as physics simulations. These types of applications demand high performance vector and matrix math, which is something that Javascript doesn't provide by default. glMatrix to the rescue! glMatrix is designed to perform vector and matrix operations stupidly fast! By hand-tuning each function for maximum performance and encouraging efficient usage patterns through API conventions, glMatrix will help you get the most out of your browsers Javascript engine.
    Downloads: 1 This Week
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  • 18
    jQuery Terminal

    jQuery Terminal

    JavaScript library for creating web-based terminals

    jQuery Terminal is a JavaScript library for creating command-line interpreters in your applications. You can use this JavaScript Terminal library to create interactive web-based terminal applications on your website. Where commands are defined by you. You can define them on the server or in the browser's JavaScript. It can automatically call JSON-RPC service when the user types a command. Alternatively, you can provide an object with methods; each method will be invoked on the user's command (the python command can create python interpreter). An object can have nested objects which will create a nested interpreter (you can create an interactive menu of adventure games with this). You can also use a function in which you can parse user commands by yourself (you have full control of what users type into the terminal). It's ideal if you want to provide additional functionality for power users.
    Downloads: 1 This Week
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  • 19
    jQuery UI

    jQuery UI

    The jQuery user interface library

    jQuery UI is a curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library. Whether you're building highly interactive web applications or you just need to add a date picker to a form control, jQuery UI is the perfect choice.
    Downloads: 1 This Week
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  • 20
    jQuery.Timeline V2

    jQuery.Timeline V2

    You can easily create the horizontal timeline with two types

    You are able to easily create two types of horizontal timeline with this jQuery plugin.
    Downloads: 1 This Week
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  • 21
    jscodeshift

    jscodeshift

    A JavaScript codemod toolkit

    jscodeshift is a toolkit for running codemods over multiple JavaScript or TypeScript files. It provides A runner, which executes the provided transform for each file passed to it. It also outputs a summary of how many files have (not) been transformed. A wrapper around recast, providing a different API. Recast is an AST-to-AST transform tool and also tries to preserve the style of original code as much as possible. As already mentioned, jscodeshift also provides a wrapper around recast. In order to properly use the jscodeshift API, one has to understand the basic building blocks of recast (and ASTs) as well. An AST node is a plain JavaScript object with a specific set of fields, in accordance with the Mozilla Parser API. The primary way to identify nodes is via their type. It's OK to not know the structure of every AST node type. The (esprima) AST explorer is an online tool to inspect the AST for a given piece of JS code.
    Downloads: 1 This Week
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  • 22
    minimatch

    minimatch

    A glob matcher in javascript

    minimatch is a lightweight JavaScript library that implements glob style pattern matching for file paths and strings. It is commonly used in Node.js tooling, build systems, and file walkers to determine whether paths match specified patterns. The library reproduces the behavior of Bash style glob expansion while adding Node specific handling for path separators. It is designed to be small, fast, and reliable, making it suitable for performance-sensitive workflows. Developers often use minimatch as a foundational dependency in larger tools such as package managers and bundlers. The project focuses on correctness in pattern parsing and cross-platform behavior. Overall, minimatch serves as a core utility for pattern-based file matching in the JavaScript ecosystem.
    Downloads: 1 This Week
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  • 23
    p5.js

    p5.js

    Client-side JS platform for artists, designers and students to express

    p5.js is a JavaScript library for creative coding, with a focus on making coding accessible and inclusive for artists, designers, educators, beginners, and anyone else! p5.js is free and open-source because we believe software, and the tools to learn it, should be accessible to everyone. Using the metaphor of a sketch, p5.js has a full set of drawing functionality. However, you’re not limited to your drawing canvas. You can think of your whole browser page as your sketch, including HTML5 objects for text, input, video, webcam, and sound. p5.js is an interpretation of Processing for today’s web. We hold events and operate with support from the Processing Foundation. For self-learners and animators, artists, game makers, creative-technologists, curriculum planners, designers, graphic designers, graphics editors, learning experience designers, project managers, software engineer, student, teachers, university faculty members, visualization researchers, etc.
    Downloads: 1 This Week
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  • 24
    plotly.js

    plotly.js

    JavaScript charting library behind Plotly and Dash

    Plotly JavaScript Open Source Graphing Library. Built on top of d3.js and stack.gl, Plotly.js is a high-level, declarative charting library. plotly.js ships with over 40 chart types, including 3D charts, statistical graphs, and SVG maps. plotly.js is free and open source and you can view the source, report issues or contribute on GitHub. For plotly.js to build with Webpack you will need to install ify-loader@v1.1.0+ and add it to your webpack.config.json. This adds Browserify transform compatibility to Webpack which is necessary for some plotly.js dependencies. When users hover over a figure generated with plotly.js, a modebar appears in the top-right of the figure. This presents users with several options for interacting with the figure. When users hover over a figure generated with plotly.js, a modebar appears in the top-right of the figure. This presents users with several options for interacting with the figure.
    Downloads: 1 This Week
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  • 25
    sharp

    sharp

    High performance Node.js image processing module

    The typical use case for this high speed Node.js module is to convert large images in common formats to smaller, web-friendly JPEG, PNG, AVIF and WebP images of varying dimensions. Resizing an image is typically 4x-5x faster than using the quickest ImageMagick and GraphicsMagick settings due to its use of libvips. Colour spaces, embedded ICC profiles and alpha transparency channels are all handled correctly. Lanczos resampling ensures quality is not sacrificed for speed. As well as image resizing, operations such as rotation, extraction, compositing and gamma correction are available. Most modern macOS, Windows and Linux systems running Node.js v10+ do not require any additional install or runtime dependencies. This module supports reading JPEG, PNG, WebP, AVIF, TIFF, GIF and SVG images. Output images can be in JPEG, PNG, WebP, AVIF and TIFF formats as well as uncompressed raw pixel data. Streams, Buffer objects and the filesystem can be used for input and output.
    Downloads: 1 This Week
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