Open Source JavaScript Software - Page 55
Sort By:
JavaScript Software
Browse free open source JavaScript Software and projects below. Use the toggles on the left to filter open source JavaScript Software by OS, license, language, programming language, and project status.
-
$300 in Free Credit for Your Google Cloud ProjectsLaunch your next project with $300 in free Google Cloud credit—no hidden charges. Test, build, and deploy without risk. Use your credit across the Google Cloud platform to find what works best for your needs. After your credits are used, continue building with free monthly usage products. Only pay when you're ready to scale. Sign up in minutes and start exploring.
-
MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
-
1
Easy DataSet
A powerful tool for creating datasets for LLM fine-tuning
Easy DataSet is a comprehensive open-source tool designed to make creating high-quality datasets for large language model fine-tuning, retrieval-augmented generation (RAG), and evaluation as easy and automated as possible by providing intuitive interfaces and powerful parsing, segmentation, and labeling tools. It supports ingesting domain-specific documents in a wide range of formats — including PDF, Markdown, DOCX, EPUB, and plain text — and can intelligently segment, clean, and structure content into rich datasets tailored for downstream LLM training needs. The system includes automated question-generation capabilities, hierarchical label trees, and answer generation pipelines that use LLM APIs to produce coherent paired data with customizable templates. Beyond dataset creation, Easy-dataset also provides a built-in evaluation system with model testing and blind-test features, helping teams validate model performance using curated test sets. -
2
Editly
Slick, declarative command line video editing & API
Editly is a tool and framework for declarative NLE (non-linear video editing) using Node.js and FFmpeg. Editly allows you to easily and programmatically create a video from a set of clips, images, audio and titles, with smooth transitions and music overlaid. Editly has a simple CLI for quickly assembling a video from a set of clips or images, or you can use its more flexible JavaScript API. Inspired by ffmpeg-concat, Editly is much faster and doesn't require much storage because it uses streaming editing. Editly aims to be very extensible and feature-rich with a pluggable interface for adding new dynamic content. -
3
Editor.md
The open source embeddable online markdown editor (component)
The open source embeddable online markdown editor (component), based on CodeMirror & jQuery & Marked. The available dependents are CodeMirror, marked, jQuery, FontAwesome, github-markdown.css, KaTeX, prettify.js, Rephael.js, flowchart.js, sequence-diagram.js, and Prefixes.scss. You can enable HTML tags decode, TeX, Flowchart, sequence diagram, Emoji, FontAwesome, task lists. You can also enable image upload, [TOCM], search replace features, code fold, etc. Combine multiple JS module files used by CodeMirror to greatly reduce HTTP requests and speed up downloading. In addition, when using Require.js, because of CodeMirror's strict module dependency restrictions, the merged module files cannot be used, and multiple module files are still dynamically loaded. Newly added images, links, anchor links, code blocks, pre-formatted text and other operations pop-up dialog layers and examples. -
4
Elasticsearch-HQ
Monitoring and Management Web Application for ElasticSearch instances
Elasticsearch-HQ is a management and monitoring tool for Elasticsearch clusters, providing a web-based interface to view, manage, and optimize cluster performance. -
99.99% Uptime for MySQL and PostgreSQL on Google CloudCloud SQL Enterprise Plus gives you a 99.99% availability SLA with near-zero downtime maintenance—typically under 10 seconds. Get 2x better read/write performance, intelligent data caching, and 35 days of point-in-time recovery. Supports MySQL, PostgreSQL, and SQL Server with built-in vector search for gen AI apps. New customers get $300 in free credit.
-
5
Electron API Demos
Desktop app to demonstrate the core features of the Electron API
This is a desktop app that interactively and with sample code demonstrates core features of the Electron API. It's built with Electron, too, of course. This app works on Windows, macOS and Linux operating systems. The Electron API Demos app interactively demonstrates the most important features of the Electron API. Use this app to see what you can do with Electron and use the source code to learn how to create a basic Electron app. You'll need Node.js installed on your computer in order to build this app. You can download the latest release for your operating system or build it yourself. For easier developing you can launch the app in fullscreen with DevTools open. If you can build a website, you can build a desktop app. Electron is a framework for creating native applications with web technologies like JavaScript, HTML, and CSS. It takes care of the hard parts so you can focus on the core of your application. -
6
Electron Release Server
A fully featured, self-hosted release server for electron applications
A fully featured, self-hosted release server for electron applications, compatible with auto-updater. Despite being advertised as a release server for Electron applications, it would work for any application using Squirrel. If you host your project on your Github and do not need a UI for your app, then Nuts is probably what you're looking for. Otherwise, you're in the same boat as I was, and you've found the right place! Docker support (thanks to EvgeneOskin)! Awesome release management interface powered by AngularJS. Authenticates with LDAP, easy to modify to another authentication method if needed. Store assets on server disk, or Amazon S3 (with minor modifications). Use pretty much any database for persistence, thanks to Sails & Waterline. Simple but powerful download urls (NOTE: when no assets are uploaded, server returns 404 by default). -
7
Email Templates
Create, preview, and send custom email templates for Node.js
Create, preview, and send custom email templates for Node.js. Highly configurable and supports automatic inline CSS, stylesheets, embedded images and fonts, and much more! Made for sending beautiful emails with Lad. We've added preview email by default to this package! If you run into any issues with configuration, files, templates, locals, etc, then you can use the DEBUG environment flag. You can swap the transport option with a Nodemailer transport configuration object or transport instance. We highly recommend using Postmark for your transport (it's the default in Lad). Out of the box, templates are cached as they are compiled (e.g. as emails are sent, the template they're using is cached). However these templates are not cached in advance, so the first emails sent of each template will be slower to send. We strongly suggest to pre-cache your templates with cache-pug-templates (if you're using the default Pug template engine). -
8
Embark
Framework for serverless Decentralized Applications using Ethereum
Embark is a platform that enables easy development and deployment of decentralized applications. Build, test, and deploy your Smart Contracts without the hassle. Embark takes care of the groundwork, watches for changes, and redeploys your application when needed. Testing shouldn't be an afterthought. Embark makes debugging and testing first-class citizens of your development workflow. Pick and choose which features, plugins and tools you want to integrate with. Embark is built with modularity in mind. Gives an overview of all processes controlled by Embark. It also comes with an interactive console and predictive commands. Cockpit's explorer lets you easily review any transactions, Smart Contracts, and accounts. With Cockpit you can iteratively and selectively deploy your Smart Contracts, removing headaches associated with complex applications. Edit your source files from right within Cockpit for quick and easy updates. -
9
Ember CP Validations
Ember computed property based validations
Ember computed property-based validations. An EmberJS validation framework that is completely and utterly computed property based. No observers were used nor harmed while developing and testing this addon. Lazily computed validations. Ruby on rails inspired validators. Support for Ember Data Models, Objects, Components, Services, etc. Support for nested models and objects. Synchronous and asynchronous support. Easily integrated with Ember Data's DS.Errors. No observers. Seriously... there are none. Like absolutely zero. Custom validators. I18n support. Debounceable validations. Warning validations. If you are upgrading from 3.x to 4.x, please checkout the upgrading documentation. -
Our Free Plans just got better! | Auth0You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
-
10
Ember-Electron
Build, test, compile and package desktop apps with Ember and Electron
The addon for creating ambitious cross platform desktop apps. Extend any Ember.js application with the access and options of a full-sized desktop application in minutes. Ember-Electron is powered by electron-forge and provides all the tooling necessary to build, test and ship your application. After installing the addon, you will find a new folder ember-electron inside your Ember project root. All code required to run an Electron project will be there. Run your project in development mode. This works pretty much like ember serve except it runs in Electron. We install the Ember Inspector and Devtron for you, so just use the Developer Tools as you would in your browser. Please note that we do not restart Electron yet when you change code there. -
11
Emoji Mart
One component to pick them all
Data required for the picker to work has been completely decoupled from the library. That gives developers the flexibility to better control their app bundle size and let them choose how and when this data is loaded. Callback when the Add custom emoji button is clicked. The button will only be displayed if this callback is provided. It is displayed when search returns no results. You can use custom emojis by providing an array of categories and their emojis. Emojis also support multiple skin tones and can be GIFs or SVGs. You can use custom category icons by providing an object with the category name as key and the icon as value. Currently supported formats are svg string and src. First, you need to make sure data has been initialized. You need to call this only once per page load. Note that if you call init like this, you don’t necessarily need to include data in your Picker props. It doesn’t hurt either, it will noop. -
12
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. -
13
Engine.IO
Transport-based cross-browser bi-directional communication layer
In most cases, the connection will be established with WebSocket, providing a low-overhead communication channel between the server and the client. Rest assured! In case the WebSocket connection is not possible, it will fall back to HTTP long-polling. And if the connection is lost, the client will automatically try to reconnect. Scale to multiple servers and send events to all connected clients with ease. Socket.IO is a library that enables real-time, bidirectional and event-based communication between the browser and the server. There are also several client implementation in other languages, which are maintained by the community. The client will try to establish a WebSocket connection if possible, and will fall back on HTTP long polling if not. WebSocket is a communication protocol which provides a full-duplex and low-latency channel between the server and the browser. -
14
ExpressJS.com
The Express.js Website
This repository contains the source for the Express web site and documentation, the canonical reference for developers using the Express framework. It organizes material into API reference, getting-started guides, best practices, and topic-focused explanations such as routing, middleware, error handling, templating, and performance. Versioned docs help readers match API behavior to the framework version they’re running, reducing confusion during upgrades. The site showcases common patterns through concise examples, making it easy to translate concepts into working code. In addition to core Express usage, the documentation surfaces ecosystem guidance on things like security headers, structured logging, and integration with view engines or ORMs. Because it is open to community contributions, the documentation evolves alongside Express itself, reflecting real-world questions and solutions. -
15
FKILL
Cross-platform tool to kill processes
To kill a port, prefix it with a colon. For example: :8080. Run without arguments to use the interactive interface. Run fkill without arguments to launch the interactive UI. Force kill processes that did not exit within the given number of milliseconds. Kill all child processes along with the parent process. (Windows only). Ignore capitalization when killing a process. Note that the case is always ignored on Windows. Suppress all error messages. For example: Process doesn't exist. -
16
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. -
17
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. -
18
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. -
19
Fastify DX
A Full Stack Framework based on Fastify and Vite
Fastify DX is an upcoming full stack framework built on top of Fastify and Vite. In this early stage, we're working to define a Universal Route Module API. Currently, only Fastify v3 is supported, v4 support is already in the works. Fastify DX is currently in alpha. Right now the focus is on implementing the same API for React, Vue, Solid and Svelte. A minimal zx-based CLI for enhanced Developer Experience is planned next. Subscribe to this newsletter to hear about the public beta. -
20
Feflow
How to write cross-platform Node.js code
How to write cross-platform Node.js code. Why you should care: according to the 2018 Node.js user survey, 24% of Node.js developers use Windows locally and 41% use Mac. In production, 85% use Linux and 1% use BSD. Installers for each major OS are available on the Node.js website. To install, switch and update Node.js versions nvm can be used on Linux/Mac. It does not support Windows but nvm-windows, nvs and ps-nvm (for PowerShell) are alternatives that do. nve can be used to run a single command with one or several different Node.js versions. nvexeca can be used to do the same programmatically. The character encoding can be specified using an encoding option with most relevant Node.js core methods. While ASCII characters display correctly on all terminals, this is not the case for all characters. -
21
Firecrawl MCP Server
Adds powerful web scraping and search to Cursor and Claude
firecrawl-mcp-server is the official MCP integration for Firecrawl that brings high-recall web scraping, crawling, and search into IDEs and agent runtimes. It exposes tools for single-page scrape, multi-URL batch jobs, site discovery, and search enrichment, returning cleaned, structured content suitable for downstream LLM reasoning. The server is designed to run with Firecrawl’s hosted API or self-hosted deployments, making it flexible for enterprise data-governance requirements. Built-in behaviors include JavaScript rendering, automatic retries, and streamable HTTP so long pages and large crawls can flow incrementally into agents. Because it’s an MCP server, clients get typed inputs/outputs and standardized error handling rather than ad-hoc prompt instructions. The repository is active, widely starred, and includes quick starts that make it easy to add web research to an agent stack. -
22
FitText.js
A jQuery plugin for inflating web type
FitText makes font-sizes flexible. Use this plugin on your fluid or responsive layout to achieve scalable headlines that fill the width of a parent element. Oh, and don't you dare let us catch you using FitText on paragraph text. This is for gigantic display text only! Your text should now fluidly resize, by default: Font-size = 1/10th of the element's width. If your text is resizing poorly, you'll want to turn tweak up/down "The Compressor". It works a little like a guitar amp. The default is 1. This will hopefully give you a level of "control" that might not be pixel perfect, but resizes smoothly & nicely. FitText now allows you to specify two optional pixel values: minFontSize and maxFontSize. Great for situations when you want to preserve hierarchy. Run FitText before anything that hides the element you're trying to size (e.g. before Carousels, Scrollers, Accordions, Tabs, etc). Hiding an element's container removes its width. It can't resize without a width. -
23
Flask Debug-toolbar
A toolbar overlay for debugging Flask applications
This extension adds a toolbar overlay to Flask applications containing useful information for debugging. The toolbar will automatically be injected into HTML responses when debug mode is on. In production, setting app.debug = False will disable the toolbar. This extension also supports the Flask app factory pattern by separately creating the toolbar and later initializing it for an app. -
24
Flatbush
A very fast static spatial index for 2D points and rectangles in JS
A really fast static spatial index for 2D points and rectangles in JavaScript. An efficient implementation of the packed Hilbert R-tree algorithm. Enables fast spatial queries on a very large number of objects (e.g. millions), which is very useful in maps, data visualizations and computational geometry algorithms. -
25
Flickity
Touch, responsive, flickable carousels
All sizing and styling of the cells are handled by your own CSS. The height of the carousel is set to the maximum height of the cells. Cells can be different sizes. You can use any unit you like: percent, pixels, etc. You can use media queries to show different number of cells for different breakpoints. If you want to use Flickity to develop commercial sites, themes, projects, and applications, the Commercial license is the appropriate license. With this option, your source code is kept proprietary. Once purchased, you’ll receive a commercial license PDF and be all set to use Flickity in your commercial applications. If you are creating an open source application under a license compatible with the GNU GPL license v3, you may use Flickity under the terms of the GPLv3. You can use Flickity as a jQuery plugin. You can initialize Flickity in HTML, without writing any JavaScript. Add data-flickity attribute to the carousel element.
