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
    Element

    Element

    A Vue.js 2.0 UI Toolkit for Web

    Element is a component library based on Vue.js 2.0 that can be used by developers, designers and product managers to build products that are logically sound, well-structured and easy to use. Element uses BEM-styled CSS so you can easily change styles when you want to. There are four ways you can change style variables. You can use the online theme roller to customize design tokens and preview new themes in real-time. You can also use the theme preview website (for changing the theme color only), update SCSS variables, or use the CLI theme tool. You can also import your own custom themes.
    Downloads: 0 This Week
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  • 2

    Elevate EXtreme Project

    Sistema para gerenciamento de projetos Elevate

    PT_BR: O objetivo do ELXP é dispor de uma ferramenta simples para controle de "pendência" de um projeto Extreme. EN: The goal is to have the ELXP a tool simple to control "pending" for a project Extreme. http://www.elevate.com.br
    Downloads: 0 This Week
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  • 3
    EmbeVi
    EmbeVi Project - Auto Embed Video From Link
    Downloads: 0 This Week
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  • 4
    Emoji-Log

    Emoji-Log

    An Emoji Git commit log messages spec standard

    After building hundreds of open source software I've ended up inventing a git commit log standard called EMOJI-LOG that helps me understand a project's history with a less cognitive load just by looking at the git log. I like emoji. I like ’em a lot. Programming, code, geeks/nerds, open-source, all of that is inherently dull and sometimes boring. Emoji (which is, in fact, the plural of emoji) helps me add colors and emotions to the mix. Nothing wrong if you want to attach feelings to this 2D flat text-based world of code. I found out that instead of memorizing hundreds of emoji it's better to keep the categories small and general.
    Downloads: 0 This Week
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  • 5

    Empact Foundation Class Library

    Cross-platform C++ library for use as a default application framework.

    A mature cross-platform C++ library for use as a default application framework. Features include: * Threading & synchronization * Socket programming: SSL, NanoMsg & ZMQ * File I/O utilities: zlib, ini, yaml * Native Database access: MySQL, SQLite, BerkleyDB, Postgre, REDIS and ODBC * Built-in mini XML parser; optional EXPAT, LIBXML and MSXML support * Network protocol stack: HTTP, FTP, SMTP, POP3, SOAP, XMLRPC * Scripting languages: Perl, Python, JavaScript, VBScript, Java, Lua, TCL, Squirrel * Cloud Computing: AWS * Encryption: OpenSSL * Platforms: Linux/Posix, Windows, Arduino * Over 500+ highly reusable classes. 4000+ fully documented functions. Follow the 'Wiki' link above to explore everything about the framework.
    Downloads: 0 This Week
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  • 6
    End-To-End

    End-To-End

    End-To-End is a crypto library to encrypt, decrypt, digital sign

    End-to-End was a client-side encryption project that prototyped OpenPGP-compatible, end-to-end encrypted messaging in the browser. The idea was to move cryptographic operations entirely to the user’s machine—key generation, encryption, and signature—so messages remain unreadable to intermediaries. It packaged a JavaScript crypto library, UI elements, and a browser extension workflow that could integrate with webmail-style UIs without server changes. The codebase emphasized careful key handling, usability experiments around key discovery and verification, and mitigations against common web threats like XSS. While the project ultimately transitioned into successor efforts, it helped push discussions about practical E2EE in mainstream web apps and the ergonomics of PGP-style workflows. Security researchers and product teams used it as a design reference for client-side cryptography and the trade-offs of operating inside a hostile web page.
    Downloads: 0 This Week
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  • 7
    Eris

    Eris

    A NodeJS Discord library

    A Node.js wrapper for interfacing with Discord. You will need NodeJS 10.4+. If you need voice support you will also need Python 2.7 and a C++ compiler. Create a directory for your bot, and change to that directory in your command line. If you want to be more updated (at the expense of stability), you can install the beta builds instead. Eris supports a few optional libraries that could potentially improve bot performance but may require additional dependencies. If you want Eris to use any of these packages, install them in the same directory as Eris, and Eris will automatically use them. You can find more examples on the GitHub repo. The rest of the docs will help you with using the various functions of the library. Have fun!
    Downloads: 0 This Week
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  • 8
    EventEmitter3

    EventEmitter3

    Because there's also a number 2. And we're faster

    EventEmitter3 is a high-performance event emitter for Node.js and the browser, providing a lightweight and efficient solution for managing events and event listeners in JavaScript applications.
    Downloads: 0 This Week
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  • 9
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  • 10
    Execution Work, it´s a new framework engine for php programming. Ew supports OOP, MVC, XML, XSL, DataBase2Objects, and much more. Ew has its own Business Components, with many "packages" to make your programming life simple and useful.
    Downloads: 0 This Week
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  • 11
    Exifr

    Exifr

    The fastest and most versatile JS EXIF reading library

    Exifr is a fast and very versatile JavaScript EXIF reading library that works everywhere, parses everything and handles just about anything you throw at it. It can handle any input: buffers, url, <img> tag and more; .jpg, .tif, and .heic files; and TIFF (EXIF, GPS, etc.), XMP, ICC, IPTC, JFIF segments. It skips parsing tags you don’t need, and reads only the first few bytes. There’s no need to read the whole file to see if there’s an EXIF file in it, or extract all the data when you just need a few tags. Instead of reading byte by byte from start to finish, Exifr jumps through the file structure from pointer to pointer, making it extremely fast and efficient!
    Downloads: 0 This Week
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  • 12
    Express ES2017 REST API Boilerplate

    Express ES2017 REST API Boilerplate

    Express starter for building RESTful APIs

    A boilerplate for building RESTful APIs with Node.js and Express, providing a pre-configured structure for efficient backend development.
    Downloads: 0 This Week
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  • 13
    F JavaScript Library is a collection of useful small javascripts.
    Downloads: 0 This Week
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  • 14
    FArP is JavaScript function arguments processor. It provides an easy way to parse function input arguments against expected types and values. Thanks to it developers can avoid chains of if conditions at the beginnings of their functions.
    Downloads: 0 This Week
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  • 15

    FCKEditor plugins

    The plugins for FCKEditor you cant find online

    The idea with the project is to develop all those plugins for FCKEditor that cant usually be found on internet. Size doesn't matter!
    Downloads: 0 This Week
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  • 16
    FKit

    FKit

    A functional programming toolkit for JavaScript

    FKit (pronounced eff-kit) is a functional programming toolkit for JavaScript. It provides many functions for solving common problems with functions, objects, arrays, and strings. It aims to provide reusable building blocks while maintaining a laser focus on everyday utility.
    Downloads: 0 This Week
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  • 17
    Web gallery based on pre-generated metadata, typically according to directory structure, not database or an administration. Development moved to: http://github.com/martinkozak/fsgal.
    Downloads: 0 This Week
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  • 18
    FSVS

    FSVS

    Full Screen Vertical Scroll

    Simple full-screen vertical slider using CSS3 transitions followed up by a jQuery fallback. Bound events support the mouse wheel, click and drag, arrow keys, and touch gestures.
    Downloads: 0 This Week
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  • 19
    Face-Detection-JavaScript

    Face-Detection-JavaScript

    Small browser-based computer vision demo

    Face-Detection-JavaScript is a small browser-based computer vision demo that uses JavaScript and face-api.js to analyze live webcam video. It loads face detection, facial landmark, face recognition, and facial expression models from a local models folder. Once the webcam stream starts, the app creates a canvas overlay and draws detection results directly over the video feed. It can identify face boxes, map facial landmark points, and display detected expressions in near real time. The project is simple enough for beginners to study, but it still demonstrates the core pieces needed for webcam access, model loading, detection loops, result resizing, and canvas rendering. It is useful as a starting point for learning client-side face detection prototypes, demos, or educational experiments.
    Downloads: 0 This Week
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  • 20
    Facebox

    Facebox

    Facebook-style lightbox, built in jQuery

    Facebox is a jQuery-based lightbox plugin designed to display content in a modal overlay on top of a webpage. It allows developers to present images, HTML content, or remote data in a visually appealing popup without navigating away from the current page. The plugin is inspired by early lightbox implementations and focuses on simplicity and ease of integration into existing web projects. It provides a clean user experience by dimming the background and highlighting the modal content, drawing attention to the displayed information. Facebox supports loading content via AJAX, making it useful for dynamic applications where content is fetched on demand. It also includes basic styling and animation effects to enhance usability and presentation.
    Downloads: 0 This Week
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  • 21
    FancyGrid

    FancyGrid

    JavaScript grid library with charts integration & server communication

    JavaScript grid library with charts integration and server communication. Massive number of features, Paging, Sorting, Filtering, Validation, Ajax data, Files data, RESTful, flexible CRUD, Integration with charts, Form module, Theming, Touch Support, and others. FancyGrid is integrated(data binding) with chart libraries, HighCharts, and sparklines. Intelligent modules system auto-detects and loads needed modules. Good Documentation, Elegant API, Number of Samples, and Professional Support.
    Downloads: 0 This Week
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  • 22
    Fantasy Land Specification

    Fantasy Land Specification

    Specification for interoperability of JavaScript algebraic structures

    This project specifies interoperability of common algebraic structures like Setoid, Ord, Semigroupoid, Category, Semigroup, Monoid, Group, Filterable, Functor, Contravariant, Apply, Applicative, etc. An algebra is a set of values, a set of operators that it is closed under and some laws it must obey. Each Fantasy Land algebra is a separate specification. An algebra may have dependencies on other algebras which must be implemented. "Value" is any JavaScript value, including any which have the structures defined below. "Equivalent" is an appropriate definition of equivalence for the given value. The definition should ensure that the two values can be safely swapped out in a program that respects abstractions. For example, two lists are equivalent if they are equivalent at all indices, two plain old JavaScript objects, interpreted as dictionaries, are equivalent when they are equivalent for all keys, two promises are equivalent when they yield equivalent values, etc.
    Downloads: 0 This Week
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  • 23
    Fawn

    Fawn

    Transactions for MongoDB

    Fawn provides the ability to carry out edits on a mongoDB database as a series of steps. If an error occurs on any of the steps, the database is returned to its initial state (its state before the transaction started). It's based on the two phase commit system described in the MongoDB docs.
    Downloads: 0 This Week
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  • 24
    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
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  • 25
    Fetch JSONP

    Fetch JSONP

    Make JSONP request like window.fetch

    Fetch JSONP is a small JavaScript library that provides a Fetch-like API for JSONP requests. Standard Fetch does not support JSONP, so this package fills that specific compatibility gap. Developers can call fetchJsonp, receive a promise, and parse the response with a familiar .json() flow. The library supports custom callback parameter names, custom callback function names, and request timeouts. It also documents the difference between regular JSON APIs and JSONP endpoints, which helps avoid common syntax errors. fetch-jsonp is useful for legacy APIs, older cross-domain integrations, and browser applications that still need JSONP behavior.
    Downloads: 0 This Week
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