Open Source JavaScript Software - Page 12
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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.
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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.
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Kokoro
An inference library for Kokoro-82M
Kokoro is an open-weight text-to-speech model and inference library built around the lightweight Kokoro-82M model. It is designed to generate high-quality speech from text while staying fast, compact, and cost-efficient compared with larger TTS systems. The project is useful for developers who want deployable speech synthesis without depending on a closed platform. It can be installed as a Python package and used in applications, scripts, experiments, or production workflows. Kokoro’s Apache-licensed weights make it flexible for personal, research, and commercial use cases. Its main value is delivering practical, accessible voice generation with a small model footprint and a simple developer workflow. -
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Leaflet
Open-source JavaScript library for mobile-friendly interactive maps
Leaflet is a leading open source JavaScript library for creating interactive, mobile-friendly maps. Leaflet is light at just about 38 KB, but is already fully equipped with all the mapping features you could need. Leaflet is simple but efficient. It doesn’t try to do everything for everybody, rather it focuses on making the basic things work perfectly. It comes ready with exceptional layering tools, customization features such as pure CSS3 popups and controls, map controls and more right out of the box, and works on all major desktop and mobile platforms. Leaflet also comes with a range of interaction features, and can be extended with an abundance of great plugins. -
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Micro App
A simple, efficient and powerful micro front-end framework
Micro-app is a web component-based micro-frontend framework from JD Retail. It enables sandboxed embedding of independent micro-apps into host pages, with automatic JS/style isolation, element segregation, preloading, and inter-app communication—all independent of framework. Provides plugin architecture and works across any frontend tech stack. -
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Shaka Player
JavaScript player library / DASH & HLS client / MSE-EME player
Shaka Player is an open-source JavaScript library for adaptive media. It plays adaptive media formats (such as DASH and HLS) in a browser, without using plugins or Flash. Instead, Shaka Player uses the open web standards MediaSource Extensions and Encrypted Media Extensions. Shaka Player also supports offline storage and playback of media using IndexedDB. Content can be stored on any browser. Storage of licenses depends on browser support. Our main goal is to make it as easy as possible to stream adaptive bitrate video and audio using modern browser technologies. We try to keep the library light, simple, and free from third-party dependencies. Everything you need to build and deploy is in the sources. We support iOS 12+ through Apple's native HLS player. We provide the same top-level API, but we just set the video's src element to the manifest/media. So we are dependent on the browser supporting the manifests. -
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Vysor
Vysor - Mirror and Control your Phone
Vysor is the repository for Vysor, a tool that mirrors and controls mobile devices from a desktop computer. It lets users view a phone screen on Windows, macOS, Linux, or browser-based environments and interact with it using a mouse and keyboard. The project supports Android screen control and includes features such as audio mirroring, notification mirroring, wireless use, drag-and-drop files, screen recording, and video quality settings. It also includes iOS mirroring support, with control behavior depending on the operating system and available input method. Vysor is useful for developers, testers, streamers, educators, and support teams that need to demonstrate or operate a phone from a larger screen. Its value is turning a mobile device into a controllable desktop window for work, debugging, presentations, and remote workflows. -
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cypress
Fast, easy and reliable testing for anything that runs in a browser
The web has evolved. Finally, testing has too. Fast, easy and reliable testing for anything that runs in a browser. Installing Cypress is simple. No dependencies, extra downloads, or changes to your code required. Write tests easily and quickly, and watch them execute in real time as you build your web application. Debugging your tests in CI is as easy as running tests locally. With built in parallelization and load balancing. Record CI test results, screenshots and video, and view aggregated, next-level insights in your dashboard. Build up a suite of CI tests, record their results and gain powerful insights. Install the Cypress Test Runner and write tests locally. Cypress has been made specifically for developers and QA engineers, to help them get more done. Cypress is based on a completely new architecture. No more Selenium. Lots more power. -
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jQuery Validation Plugin
jQuery Validation Plugin library sources
The jQuery Validation Plugin provides drop-in validation for your existing forms, while making all kinds of customizations to fit your application really easy. This jQuery plugin makes simple clientside form validation easy, whilst still offering plenty of customization options. It makes a good choice if you’re building something new from scratch, but also when you’re trying to integrate something into an existing application with lots of existing markup. The plugin comes bundled with a useful set of validation methods, including URL and email validation, while providing an API to write your own methods. All bundled methods come with default error messages in english and translations into 37 other languages. The plugin was initially written and maintained by Jörn Zaefferer, a member of the jQuery team, lead developer on the jQuery UI team and maintainer of QUnit. It was started back in the early days of jQuery in 2006, and updated and improved since then. -
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jq.Schedule
jquery and html schedule calendar
jQuery and HTML schedule calendar. -
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katana
Fast CLI web crawler for discovering endpoints in modern web apps
Katana is an open source command-line web crawling and spidering framework developed by ProjectDiscovery. It is designed to efficiently crawl websites and web applications in order to discover endpoints, resources, and other useful information that may not be easily visible through manual browsing. Katana focuses on speed and automation, making it suitable for use in security reconnaissance workflows and automated pipelines. Katana supports both standard HTTP crawling and headless browser crawling, allowing it to navigate modern web applications that rely heavily on JavaScript. Through headless browsing, it can analyze dynamic content and single-page applications built with modern frameworks, improving its ability to uncover hidden paths and assets. Katana offers flexible configuration options such as depth control, concurrency limits, and filtering mechanisms to refine results and manage scanning scope. -
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window.fetch polyfill
A window.fetch JavaScript polyfill
window.fetch polyfill is a JavaScript polyfill that provides the standard window.fetch API and related interfaces in older web browsers. Importing the package patches the browser environment only when native support is missing or incomplete. It supports common workflows for retrieving HTML or JSON, inspecting response metadata, posting forms or JSON, and uploading files through FormData. Requests return Promises and follow the behavior defined by the Fetch specification, including its handling of HTTP error statuses. Abortable requests are supported when compatible AbortController and AbortSignal implementations are available. The package is designed for browsers rather than Node.js and has little effect in modern browsers with native fetch support. -
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RECOIL
Retro Computer Image Library
Retro Computer Image Library decodes Amiga, Amstrad CPC, Apple II, Atari 8-bit, Atari Portfolio, Atari ST/TT/Falcon, BBC Micro, Commodore 64, Commodore 16/116/Plus4, Commodore 128, Electronika BK, FM Towns, HP 48, Macintosh 128K, MSX, NEC PC-80/88/98, Oric, SAM Coupe, Sharp X68000, Tandy 1000, Timex 2048, TRS-80, TRS-80 Color Computer, ZX81 and ZX Spectrum picture formats. The project contains a simple viewer, plug-ins for general-purpose image viewers and editors, and an everything-to-png converter. -
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AIGCPanel
One-stop AI digital human system with video voice synthesis tools
AIGCPanel is an open source desktop application designed as a comprehensive, all-in-one platform for creating AI-powered digital humans and media content. It integrates multiple capabilities such as video synthesis, voice synthesis, and voice cloning into a unified interface, allowing users to generate realistic audiovisual outputs with minimal setup. AIGCPanel focuses heavily on simplifying the management of local AI models by providing streamlined workflows for importing, configuring, and running different models with minimal manual effort. It supports one-click model deployment, making it accessible even to beginners who may not be familiar with complex AI environments. AIGCPanel also includes tools for synchronizing lip movements with generated speech, enabling more realistic digital avatar videos. Built using modern desktop technologies, it delivers a cross-platform experience while maintaining a graphical interface for monitoring tasks and logs. -
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DuckDuckGo Browser Extensions
DuckDuckGo Privacy Essentials browser extension for Firefox, Chrome
Privacy, simplified. One super-charged app, multiple types of privacy protection. The DuckDuckGo app provides the most comprehensive online privacy protection with the push of a button. With one download, you get a new everyday browser that offers seamless protection while you search and browse, and even access to tracking protection for emails you receive. Protecting your privacy online is like protecting your home. Locking the front door won’t stop the most determined folks from getting inside, especially if you’ve left the back door and windows unlocked and an extra key under the doormat. That’s why we offer multiple types of privacy protection, most of which aren’t offered in most popular browsers by default. DuckDuckGo Private Search comes built-in, so you can easily search the web without being tracked. Automatically stop most hidden trackers (3rd-party scripts) from loading, which prevents companies from collecting and using (e.g. sale, ads, etc.). -
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Impeccable
The design language that makes your AI harness better at design
Impeccable is a design skill system that helps AI coding tools produce better frontend interfaces by giving them a richer design vocabulary. It provides one comprehensive skill, multiple commands, and curated reference files covering typography, color, motion, spacing, interaction, responsive design, and UX writing. The project is built to counter common AI-generated design habits such as generic SaaS layouts, overused fonts, nested cards, weak hierarchy, and predictable gradients. It can be installed across several AI coding environments, including Claude Code, Cursor, Codex, Gemini CLI, GitHub Copilot, and others. Impeccable also includes deterministic anti-pattern detection through a CLI and browser extension without requiring an API key. It is most useful for developers and designers who want AI-generated interfaces to feel more polished, intentional, and product-aware. -
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KaTeX
Fast math typesetting for the web.
KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web. Fast: KaTeX renders its math synchronously and doesn't need to reflow the page. See how it compares to a competitor in this speed test. Print quality: KaTeX's layout is based on Donald Knuth's TeX, the gold standard for math typesetting. Self contained: KaTeX has no dependencies and can easily be bundled with your website resources. Server side rendering: KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML. KaTeX is compatible with all major browsers, including Chrome, Safari, Firefox, Opera, Edge, and IE 11. -
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Midscene
Vision-based AI framework for cross-platform UI automation tasks
Midscene.js is an open source AI-driven UI automation framework designed to control user interfaces across multiple platforms using natural language instructions. Instead of relying on traditional selectors, DOM structures, or accessibility attributes, it uses a vision-first approach where screenshots are analyzed by visual-language models to identify interface elements and perform actions. It allows developers to automate interactions on web applications, desktop software, and mobile devices without needing platform-specific automation logic. Developers can describe tasks such as clicking buttons, filling forms, or extracting information, and the system interprets these commands to interact with the interface accordingly. Midscene.js includes SDKs, scripting options, and integration capabilities that allow automation workflows to be written in JavaScript, TypeScript, or YAML-based scripts. Midscene also provides debugging and development tools. -
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OWASP Juice Shop
Probably the most modern and sophisticated insecure web application
It can be used in security trainings, awareness demos, CTFs and as a guinea pig for security tools! Juice Shop encompasses vulnerabilities from the entire OWASP Top Ten along with many other security flaws found in real-world applications! Juice Shop is written in Node.js, Express and Angular. It was the first application written entirely in JavaScript listed in the OWASP VWA Directory. The application contains a vast number of hacking challenges of varying difficulty where the user is supposed to exploit the underlying vulnerabilities. The hacking progress is tracked on a scoreboard. Finding this scoreboard is actually one of the (easy) challenges! Apart from the hacker and awareness training use case, pentesting proxies or security scanners can use Juice Shop as a “guinea pig”-application to check how well their tools cope with JavaScript-heavy application frontends and REST APIs. -
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POI POI POI
Scalable KanColle browser and tool
poi is a scalable browser and tool set for Kantai Collection(KanColle). Key features include proxy,HTTP, Socks5 and PAC (Experimental). Cache, including custom cache. Data synthesis and analysis. Notification and plugin support for extensive functionalities. -
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Serialize JavaScript
Serialize JavaScript to a superset of JSON
Serialize JavaScript to a superset of JSON that includes regular expressions, dates and functions. The code in this package began its life as an internal module to express-state. To expand its usefulness, it now lives as serialize-javascript — an independent package on npm. A primary feature of this package is to serialize code to a string of literal JavaScript which can be embedded in an HTML document by adding it as the contents of the script element. In order to make this safe, HTML characters and JavaScript line terminators are escaped automatically. -
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StackEdit
In-browser Markdown editor
Unrivalled writing experience. StackEdit’s Markdown syntax highlighting is unique. The refined text formatting of the editor helps you visualize the final rendering of your files. StackEdit provides very handy formatting buttons and shortcuts, thanks to PageDown, the WYSIWYG-style Markdown editor used by Stack Overflow. Whether you write, you review, you comment… StackEdit's layout provides you with the flexibility you need, without sacrifice. StackEdit’s Scroll Sync feature accurately binds the scrollbars of the editor panel and the preview panel to ensure that you always keep an eye on the output while writing. StackEdit can sync your files with Google Drive, Dropbox and GitHub. It can also publish them as blog posts to Blogger, WordPress and Zendesk. You can choose whether to upload in Markdown format, HTML, or to format the output using the Handlebars template engine. -
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YesPlayMusic
Play Music for Windows / macOS / Linux
High-quality third-party NetEase cloud player, supports Windows / macOS / Linux :electron. Overseas users can play directly (need to log in to NetEase Cloud account). Support UnblockNeteaseMusic, automatically replace grayed out song links with various audio sources (web version not supported). Various audio sources" refers to audio sources that are enabled by default. YouTube audio source needs to install yt-dlp by itself. Daily automatic check-in (check-in on mobile and computer at the same time) Light/Dark Mode auto switch. Support Touch Bar. Support PWA, you can click ➕ on the right side of the address bar in Chrome/Edge to install it to your computer. Support Last.fm Scrobble. Support music cloud disk. Custom shortcuts and global shortcuts. Support Mpris. More features in development. -
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camaro
camaro is an utility to transform XML to JSON, using Node.js
camaro is a utility to transform XML to JSON, using Node.js bindings to a native XML parser pugixml - one of the fastest XML parsers around. -
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magic-string
Manipulate strings like a wizard
magic-string is a small JavaScript utility for editing strings while preserving accurate source maps. It is designed for compilers, bundlers, preprocessors, and code transformation tools that need to rewrite source code safely. The library lets developers overwrite, append, prepend, remove, move, and slice sections of text without losing track of where transformed content came from. This makes it especially useful when generated output still needs to map back to the original source for debugging. Magic String works in both Node.js and browser environments. Its main value is making code manipulation precise, fast, and source-map-friendly for build tools and language tooling. -
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KoboldCpp
Run GGUF models easily with a UI or API. One File. Zero Install.
KoboldCpp is an easy-to-use AI text-generation software for GGML and GGUF models, inspired by the original KoboldAI. It's a single self-contained distributable that builds off llama.cpp and adds many additional powerful features. -
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teemIP - CMDB & DDI solution
teemIP : Open source IPAM & DDI solution with CMDB integration.
teemIP is an open source, web-based IP Address Management (IPAM) and DDI solution built on the iTop framework. It provides comprehensive IP management: IPv4/IPv6 plan management, subnet hierarchy, IP lifecycle, VLAN and DNS/DHCP integration. teemIP is now maintained by the teemIP SAS founding team: Christophe Naud (original creator), Martin de Laval and Quentin Ville. The company is being officially incorporated in July 2026. The project remains open source under AGPL v3. Professional support, integration services and subscriptions: https://www.teemip.com
