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.

  • Earn up to 16% annual interest with Nexo. Icon
    Earn up to 16% annual interest with Nexo.

    Access competitive interest rates on your digital assets.

    Generate interest, borrow against your crypto, and trade a range of cryptocurrencies — all in one platform. Geographic restrictions, eligibility, and terms apply.
    Get started with Nexo.
  • Forever Free Full-Stack Observability | Grafana Cloud Icon
    Forever Free Full-Stack Observability | Grafana Cloud

    Our generous forever free tier includes the full platform, including the AI Assistant, for 3 users with 10k metrics, 50GB logs, and 50GB traces.

    Built on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
    Create free account
  • 1
    FeedEk jQuery RSS/ATOM

    FeedEk jQuery RSS/ATOM

    FeedEk jQuery RSS/ATOM Feed Plugin

    FeedEk is a jQuery plugin for parsing and displaying RSS and Atom feeds. You can obtain feeds easily from any domain. No need for server-side scripts. Feed API is used for fetching RSS/Atom feed data.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    File Icons

    File Icons

    Atom file-specific icons for improved visual grepping

    File-specific icons in Atom for improved visual grepping. Everything is handled using CSS classes. Use your stylesheet to change or tweak icons. Consult the package stylesheets to see what classes are used. Choose your own shades. Assign icons by file extension. Assign icons to directories. A restart is needed to complete the installation. Reload the window, or restart Atom. As of v2.0, classes are used for displaying icons instead of mixins. If you're a package author, you can integrate File-Icons using Atom's services API.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3

    Flask-AppBuilder

    Rapid web application development (python + Flask)

    Simple and rapid Application builder, built on top of Flask. includes detailed security, auto form generation, google charts and much more. Demo on: http://flaskappbuilder.pythonanywhere.com/
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    Flowy

    Flowy

    The minimal javascript library to create flowcharts

    flowy is a minimal JavaScript library for building interactive flowchart-style interfaces in web applications, allowing developers to create node-based editors, automation builders, or visual programming tools with relatively little code. It provides draggable, connectable blocks (nodes) that can be placed on a canvas, connected via lines, and rearranged dynamically while preserving the underlying graph structure. The library focuses on simplicity and aesthetics, offering a clean look out of the box that can be customized with your own CSS, making it suitable for dashboards, SaaS products, or internal tools. Events emitted by flowy enable integration with your own data model, so you can sync block positions, connections, and metadata back to a database or application state. It is framework-agnostic, so it can be dropped into vanilla JavaScript projects or wrapped inside React, Vue, or other frameworks.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Train ML Models With SQL You Already Know Icon
    Train ML Models With SQL You Already Know

    BigQuery automates data prep, analysis, and predictions with built-in AI assistance.

    Build and deploy ML models using familiar SQL. Automate data prep with built-in Gemini. Query 1 TB and store 10 GB free monthly.
    Try Free
  • 5
    Javascript bindings for C++, a Javascript interpreter/shell & Javascript/C++ module system. It includes a few Javascript classes and modules. It supports easy embedding of Javascript in C++ and vice versa. The currently supported engine is Spidermonkey.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    Fluster is a clustering algorithm for the Google Maps API v3. It manages all your markers on the map and summarizes them to "clustered markers" if there is not enough space around them. Acts like MarkerClusterer for v2.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Fotorama source

    Fotorama source

    A simple, stunning, powerful jQuery gallery

    Our platform is designed to make it easy for businesses, marketers, and individuals to create stunning visual content, such as graphics, images, and videos. We understand the importance of visual content in today's digital world and we are committed to providing our users with the tools they need to stand out from the crowd. With Fotorama.io, you can create professional-quality visual content without any prior design experience. Our user-friendly interface and drag-and-drop functionality make it easy to create eye-catching graphics, images, and videos in just a few clicks. To make the choice quickly and safely, it is recommended to pay attention to the rating Casinos online Russia. This is a special platform, which presents players to make a choice from a list of all available casinos to play. Each user can view a detailed description of each site and make the appropriate choice.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    The Frost library is a tool for JavaScript development in widget engines and mobile browsers. We try to create a simple means for unified access to device capabilities and Ajax requests in as many different widget engines and mobile browsers as possible.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    GQLx is a SQL-like query language for Google Doc's spreadsheets. The initial release includes both a Java GUI application as well as a console application - while a demonstration Javascript implementation is available online at http://gqlx.twyst.co.za
    Downloads: 0 This Week
    Last Update:
    See Project
  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
    Start Free
  • 10
    GTR [gi'tar] General/GTR Tag Replacer Project with the aim of producing js library for automated tag replacing with a stripped set of cross-platform functions and an automated check for reusing installed libs such as Prototype and jQuery.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Genie Alert is a alternate to JavaScript alert windows, with lot of options to customize the title, icons, styles, buttons, button handlers etc.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Google API JavaScript Client

    Google API JavaScript Client

    Google APIs Client Library for browser JavaScript, aka gapi

    This library (often used via gapi) provides a browser-friendly way to call Google APIs using OAuth 2.0 and generated discovery documents. It abstracts discovery, auth, and HTTP details so developers can focus on domain calls like Drive file operations, Calendar events, or YouTube data. The client can load APIs dynamically at runtime, which keeps bundles small and allows late-binding to specific services and versions. It includes helpers for incremental auth, token refresh, and scopes so apps can request only what they need when they need it. Responses are returned as promise-based calls with typed parameters derived from service definitions, simplifying error handling and pagination. Because it runs in the browser, it’s a natural fit for single-page apps that integrate deeply with Google services.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Google Map React

    Google Map React

    Google map library for react that allows rendering components

    Google map library for react that allows rendering components as markers. google-map-react is a component written over a small set of the Google Maps API. It allows you to render any React component on the Google Map. It is fully isomorphic and can render on a server. Additionally, it can render map components in the browser even if the Google Maps API is not loaded. It uses an internal, tweakable hover algorithm - every object on the map can be hovered. It allows you to create interfaces like this example (You can scroll the table, zoom/move the map, hover/click on markers, and click on table rows) In the simple case you just need to add lat and lng props to any child of GoogleMapReact component.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14

    HTML Barcode SDK

    HTML and Javascript barcode generation Software Development Kit

    HTML Barcode SDK is a HTML and Javascript barcode generation Software Development Kit (SDK). It creates commonly-used 1 dimensional barcodes like Code 128, Code39, UPCA, EAN13 and others using pure Hypertext Markup Language (HTML) and can be used in a wide variety of browsers without additional browser plug-ins.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    HTML5 Demos and Examples

    HTML5 Demos and Examples

    Collection of hacks and demos showing capability of HTML5 apps

    HTML5 Demos and Examples is a classic collection of HTML5 experiments and demonstration files created to show the capabilities of modern web APIs and browser technologies during the rise of HTML5. The repository is an archive of interactive examples—ranging from canvas tricks to video, audio, drag-and-drop, WebSockets, and more—that illustrate how HTML, CSS, and JavaScript can combine to build rich, browser-centric experiences without plugins. Each demo is a self-contained piece of code you can open, explore, and learn from, and the collection was curated to help developers grasp emerging standards at a time when HTML5 was gaining traction and not yet ubiquitous. Though no longer actively maintained, the archive still contains hundreds of creative examples that can teach fundamentals and spur experimentation with web features. Developers historically used it as a reference when testing browser support for features or teaching newcomers how specific APIs behave in real code.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Highland

    Highland

    High-level streams library for Node.js and the browser

    Highland is a JavaScript library designed to simplify working with streams and asynchronous data flows by providing a functional programming interface on top of Node.js streams. It allows developers to process data in a declarative and composable way, treating streams as sequences that can be transformed using familiar functional patterns such as map, filter, reduce, and flatMap. The library abstracts away much of the complexity of handling backpressure and asynchronous callbacks, enabling developers to focus on data transformation logic rather than low-level stream management. Highland supports both synchronous and asynchronous sources, including arrays, events, promises, and Node streams, making it highly versatile. It also emphasizes lazy evaluation, meaning that data is processed only when needed, improving performance and efficiency in large data pipelines.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Javascript library to check in a web page if an user is active or idle, action detected by mouse move or key down, depending user's state linked action will be launched more or less often.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Image Map Resize

    Image Map Resize

    Responsive HTML Image Maps

    This is a simple library that makes HTML Image Maps responsive so that they automatically stay scaled to the size of the image they are attached to. It detects the window being resized and updates the coordinates of the image map accordingly. This library can be used with or without jQuery.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Image Select

    Image Select

    Image Select is an extension of Chosen, a jQuery plugin

    We designed this plugin extension as a humanized UI element for social networking sites that need to facilitate relations between people. Research shows that people are extremely sensitive to photos of others, so we needed to revamp the traditional UI elements to make them more intuitive and human. You can use these plugin extensions for modeling multiple (one-to-many) or single (one-to-one) relations between people. We couldn't find any scripts that had this full functionality, so we developed it ourselves on top of Chosen. Hope you find it helpful, and get back if you have any feedback/improvements.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Intermock

    Intermock

    Mocking library to create mock objects with fake data for TypeScript

    Intermock is a TypeScript utility developed by Google that automatically generates mock objects and JSON data for TypeScript interfaces using the Faker library. It simplifies frontend and API testing by creating realistic, schema-compliant mock data directly from interface definitions, eliminating the need for manual mock creation. Intermock supports a wide range of TypeScript constructs including interfaces, unions, generics, mapped types, and tuples, ensuring comprehensive type coverage. It can be used both via a command-line interface (CLI) and programmatically through its API, making it suitable for integration into build pipelines or development environments. The tool also allows fine-grained control over output format—object, JSON, or string—and supports JSDoc annotations to define custom Faker data generators. By leveraging Intermock, developers can quickly generate realistic mock datasets for testing, prototyping, and documentation purposes without writing boilerplate code.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Intro.js

    Intro.js

    Lightweight library for creating step-by-step customer onboarding

    Intro.js is a lightweight library for creating step-by-step customer onboarding. You can install Intro.js in a few simple steps. Intro.js consists of two main files, the JavaScript part and the CSS part which renders the elements nicely. The simplicity of Intro.js API will help you to develop an advanced onboarding for your products. Intro.js is lightweight, 10kB and has no external dependencies! Intro.js provides various ways to configure your product onboarding and customize every single step of your tour. Intro.js is Free and open-source, published under AGPL license. We also provide commercial license, supporting your team to successfully integrate Intro.js! Intro.js is AGPL-licensed and open-source. However, if you want to use Intro.js in your commercial app, website or plugin, you would need to obtain a commercial license.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Involt

    Involt

    Inject hardware interactions directly into HTML layout

    An easy way to think outside the box. Simplicity of HTML and CSS combined with hardware interactions. Create your app using only basic knowledge of HTML, CSS, and Arduino. Instead of learning advanced coding focus on overall experience and quickly develop results. Using CSS allows you to work on the layout and interfacing with the device at once. Involt comes with a UI kit to help you get started. The foundation of Involt is overcoming obstacles that block many concepts from making it to the real world. There are many prototyping tools for software and hardware but none covers both. With its fresh approach, inject tangible interactions into your app like never before.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23

    Ionflux Computer Graphics Toolkit

    Toolkit for 2D and 3D computer graphics

    NOTICE: This repository of IFCG will no longer be maintained. You can find the current version at https://github.com/TehFlux/ifcg The Ionflux Computer Graphics Toolkit is a collection of libraries for 2D and 3D graphics processing. The toolkit is written primarily in C++ and has full Python bindings for all components.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    JAgile (or "Java Agile") is a simple but practical framework in Java. It implements some JEE Patterns as Transfer Object, Session Facade, Business Object, DAO Factory and DAO. Its unique persistence implementation is the Hibernate Framework.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25

    JMG

    JavaScript GUI library.

    JMG is a JavaScript GUI library. The goal of the project is to allow developers, the creation of responsive web applications using the same code for desktop and mobile devices.
    Downloads: 0 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB