Browse free open source JavaScript Browsers and projects below. Use the toggles on the left to filter open source JavaScript Browsers by OS, license, language, programming language, and project status.

  • Agentic AI SRE built for Engineering and DevOps teams. Icon
    Agentic AI SRE built for Engineering and DevOps teams.

    No More Time Lost to Troubleshooting

    NeuBird AI's agentic AI SRE delivers autonomous incident resolution, helping team cut MTTR up to 90% and reclaim engineering hours lost to troubleshooting.
    Learn More
  • Empower Your Workforce and Digitize Your Shop Floor Icon
    Empower Your Workforce and Digitize Your Shop Floor

    Benefits to Manufacturers

    Easily connect to most tools and equipment on the shop floor, enabling efficient data collection and boosting productivity with vital insights. Turn information into action to generate new ideas and better processes.
    Learn More
  • 1
    browserify

    browserify

    browser-side require() the node.js way

    Browserify lets you require('modules') in the browser by bundling up all of your dependencies. Browsers don't have the require method defined, but Node.js does. With Browserify you can write code that uses require in the same way that you would use it in Node. Install the uniq module with npm. Now recursively bundle up all the required modules starting at main.js into a single file called bundle.js with the browserify command. Browserify parses the AST for require() calls to traverse the entire dependency graph of your project. Drop a single <script> tag into your html and you're done! browserify is a tool for compiling node-flavored commonjs modules for the browser. You can use browserify to organize your code and use third-party libraries even if you don't use node itself in any other capacity except for bundling and installing packages with npm.
    Downloads: 1 This Week
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  • 2
    jstree

    jstree

    jquery tree plugin

    jsTree is jquery plugin, that provides interactive trees. It is absolutely free, open-source and distributed under the MIT license. jsTree is easily extendable, themable and configurable, it supports HTML & JSON data sources and AJAX loading. jsTree functions properly in either box-model (content-box or border-box), can be loaded as an AMD module, and has a built in mobile theme for responsive design, that can easily be customized. It uses jQuery's event system, so binding callbacks on various events in the tree is familiar and easy. Themes can be autloaded too, but it is best for performance to include the CSS file. jsTree requires 1.9.0 or greater in your webpage. You can use a CDN version or include a local copy. Once the DOM is ready you can start creating jstree instances. jsTree uses events to notify you when something changes while users (or you) interact with the tree.
    Downloads: 1 This Week
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  • 3
    organice

    organice

    An implementation of Org mode without the dependency of Emacs

    organice is an implementation of Org mode without the dependency of Emacs. It is built for mobile and desktop browsers and syncs with Dropbox, GitLab, and WebDAV. At 200ok, we run an instance of organice at https://organice.200ok.ch, which is open for anyone to use! organice does not have a back-end (it’s just a front-end application, which uses different back-end storage providers). We don’t store any kind of data on our servers - we also don’t use analytics on organice.200ok.ch. Emacs is great, but it’s desktop software. For users who want to access or edit their Org mode files whilst on the go, organice is a great choice. organice is a web application. You can use it from any browser. On iOS and Android, you can install organice to your homescreen. When started from there, it will run in full-screen as a Progressive Web Application (PWA) which will add offline capabilities (see chapters progressive web app and offline support).
    Downloads: 1 This Week
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  • 4
    passff

    passff

    zx2c4 pass manager extension for Firefox, Chrome and Opera

    zx2c4 pass management extension for Mozilla Firefox. Pending Chrome port. Official signed version can be found on the Mozilla add-on page. This extension will allow you to access your zx2c4 pass repository directly from your web browser. You can choose to automatically fill and submit login forms if a matching password entry is found. Add-on that allows users of the unix password manager 'pass' to access their password store from Firefox. PassFF allows users of the unix password manager pass (see below) to access their password repository directly from Firefox. PassFF can be configured to auto-fill and auto-submit login forms when a matching password entry is found.
    Downloads: 1 This Week
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  • CloudZero: The Cloud Cost Optimization Platform Icon
    CloudZero: The Cloud Cost Optimization Platform

    CloudZero automates the collection, allocation, and analysis of your infrastructure and AI spend to uncover waste and improve unit economics.

    CloudZero is the leader in proactive cloud cost efficiency. We enable engineers to build cost-efficient software without slowing down innovation. CloudZero's next-generation cloud cost optimization platform automates the collection, allocation, and analysis of cloud costs to uncover savings opportunities and improve unit economics. We are the only platform that enables companies to understand 100% of their operational cloud spend and take an engineering-led approach to optimizing that spend. CloudZero is used by industry leaders worldwide, such as Coinbase, Klaviyo, Miro, Nubank, and Rapid7.
    Learn More
  • 5
    slick

    slick

    The last carousel you'll ever need

    slick is an open source, responsive carousel plugin that offers a great number of breakpoints, CSS3 transitions, touch events and so much more. It creates fully responsive, customizable and mobile-friendly carousels that can work with any html element. Everything you’ll ever need for your carousel, slick can achieve quickly and easily. It features a comprehensive range of settings, events, methods and more so you can build a carousel in exactly the way you want. It supports IE8+ as well as most modern browsers (Chrome, Firefox, Safari). See it in action in demos on http://kenwheeler.github.io/slick/
    Downloads: 1 This Week
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  • 6
    web-extension-starter

    web-extension-starter

    Web Extension starter to build "Write Once Run on Any Browser"

    Web Extension starter to build "Write Once Run on Any Browser" extension. Cross Browser Support (Web-Extensions API). Browser Tailored Manifest generation. Automatic build on code changes. Auto packs browser-specific build files. SASS styling. TypeScript by default. ES6 modules support. React UI Library by default. Smart reload. Used by extensions in production that has over 100,000+ users.
    Downloads: 1 This Week
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  • 7
    Nightingale

    Nightingale

    A community supported fork of the Songbird media player and library.

    Nightingale is a community created fork of the Songbird media player. It is developed by a proud community and we are equally proud to bring you the most extensible, feature-rich media experience on Windows, Mac, and Linux. See the official website at http://getnightingale.com for the source, builds, and information. On Sourceforge, we provide our releases, the binary deps for building, as well as builds for testing purposes.
    Downloads: 25 This Week
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  • 8
    XML Viewer Plus

    XML Viewer Plus

    A powerful XML Viewer - add-on for browser Firefox

    A powerful XML Viewer, supports text/regex and jQuery/CSS, XPath selectors ==== Release 1.2.6 - 17.06.2019 - Added utf-8 encode for xml viewer ==== Get your XML Editor and Validator on Play Store > https://play.google.com/store/apps/details?id=com.ulm.xmleditor ==== ## Libraries and techs used 1. `Vue` 2. `Vuex` 3. `lodash/debounce` 4. `jQuery` 5. `document.querySelectorAll` 6. `document.evaluate` for `XPath` 7. `bestzip` for packaging ### Limitations - WebExtension only works on sites that allow content scripts.
    Downloads: 12 This Week
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  • 9
    Mozilla GPO plugin/module

    Mozilla GPO plugin/module

    Firefox and Thunderbird addon to manage settings using AD Group Policy

    Firefox, Thunderbird and Pale Moon autoconfig module for manage user preferences and user profile CA certificates from Active Directory Group Policy. I highly recommend using the Group Policy addon with Firefox ESR releases. Regular releases may contain changes to which the addon is not adapted. Since 53 Firefox support only WebExtensions. WebExtensions can't access to registry and can't do anything with application preferences. Therefore the **last version** of Firefox in which this **add-on** works - 52 ESR, because of this since 1.0 version its **autoconfig module**.
    Downloads: 6 This Week
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  • GWI: On-demand Consumer Research Icon
    GWI: On-demand Consumer Research

    For marketing agencies and media organizations requiring a solution to get consumer insights

    Need easy access to consumer insights? Our intuitive platform is the answer. Get the ultra-reliable research that brands and agencies need to stay ahead of changing consumer behavior.
    Learn More
  • 10
    pidCrypt
    pidCrypt is no longer maintained! pidCrypt is a crypto library offering modular cryptographic functions in JavaScript. Supports: AES (CBC & CTR Mode), RSA, MD5, SHA-1, SHA-256, SHA-384, SHA-512, ASN.1, Base64, UTF-8. The AES-CBC mode is compatible to OpenSSL.
    Downloads: 7 This Week
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  • 11
    htmlarea

    htmlarea

    Small, powerful, full featured WYSIWYG editor

    HTMLArea 4 is a browser based WYSIWYG editor that easily replaces the TEXTAREA in your web pages. It is written in JavaScript, and suitable for use in any modern web browser, and any page on your web site. Current version is 4.0-2016-08-29
    Downloads: 9 This Week
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  • 12
    Crusta Browser

    Crusta Browser

    Lightweight webbrowser in Qt5

    Lightweight, fast, simple and secure webbrowser in Qt5. Visit https://crustabrowser.com for more details
    Downloads: 4 This Week
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  • 13
    Another YouTube Downloader
    Cross browser userscript to download videos from YouTube in various formats and sizes available. Find size of videos before downloading (http://pradip.x10.mx/index.php/download-details/36/Helper) Check Readme.txt in Files section for installation instructions.
    Downloads: 4 This Week
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  • 14
    Password Extractor

    Password Extractor

    Transfer passwords to and from K-Meleon

    Transfer passwords between browsers. This extension for K-Meleon can also be installed on other browsers that use XUL including SeaMonkey, Pale Moon, Mypal, Roytam's New Moon, and Waterfox Classic. The Password Extractor XML export/import format is also used by Password Exporter (for Firefox and SeaMonkey) and Password Backup Tool (for Pale Moon and Basilisk). The CSV export format is compatible with popular browsers and password managers including Mozilla Firefox, Google Chrome, Microsoft Edge, Opera, Brave, Vivaldi, KeePass, and KeePassXC. To import passwords from another browser's CSV password export use the Password Extractor conversion tool for your browser.
    Downloads: 7 This Week
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  • 15
    Text to Voice
    'Text to Voice' or 'Text to Speech' is 1 of the coolest Firefox add-ons. It gives ur brwsr the pwr of speech. Select txt, clck the bttn on the bttm rite & this add-on spks the selectd txt 4 u. Isn't it brllant? Moreovr odio file cn b dnloaded as
    Downloads: 7 This Week
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  • 16
    CherryPad - Browser Notepad

    CherryPad - Browser Notepad

    Your Sleek, Distraction-Free Notepad for Endless Productivity

    CherryPad: Your Sleek, Distraction-Free Notepad for Endless Productivity Welcome to CherryPad 🍒, the notepad extension for your browser! CherryPad is designed to make your note-taking experience quick, convenient, and visually pleasing. With features like AutoSave, a built-in emoji panel, and hidden Easter Eggs, CherryPad offers a fun yet practical workspace.
    Downloads: 6 This Week
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  • 17
    LeechCraft
    LeechCraft is a cross-platform modular "internet-client" application. It has plugins that allow one to browse the web, chat via instant messaging (like Jabber or IRC), read RSS/Atom feeds, download files via BitTorrent, Direct Connect and other protocols, play media files and much more.
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    Downloads: 2 This Week
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  • 18
    Lobo Evolution - Java Web Browser

    Lobo Evolution - Java Web Browser

    Lobo Evolution is an extensible all-Java web browser and RIA platform

    Lobo Evolution is a fork of Lobo Browser. The project continuing the work of Lobo Browser(lobochief). Lobo Evolution is an extensible all-Java web browser and RIA platform. It supports HTML 4, HTML5 Javascript, CSS 3 and Java (Swing) rendering. CobraEvolution is the web browser's renderer API; also a Javascript-aware HTML parser. Lobo Evolution 5.0 relesed CHANGELOG: https://github.com/LoboEvolution/LoboEvolution/releases Read wiki: https://loboevolution.github.io/LoboEvolution/project-info.html Javadoc site: https://oswetto.github.io/LoboEvolution Now you can fork the project and help me with code. I'm waiting your first commit! Source code: https://github.com/LoboEvolution/LoboEvolution
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    Downloads: 3 This Week
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  • 19

    seaart-save-metadata

    Chrome extention to save metadata of works on seart.ai in XMP in files

    (modified 2025-12-20) v1.1.0 Now it also works on `postDetail` pages. Chrome extention to save metadata of works on seart.ai in XMP and embed them into files. Works on /explore/detail pages and /postDetail/ pages. Does NOT work to videos. Filenames are automatically sanitized. It saves: prompt, model, checkpoint, lora, creator, source, etc. of each work. Press a button to start fetching metadata and download a work on a target page. # Installation Unpack the release and directly load it into Chrome with "Load unpacked".
    Downloads: 3 This Week
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  • 20
    Mantra on Chromium

    Mantra on Chromium

    Chromium based portable browser for pentesters

    MoC is a chromium based portable browser with collection of open source extensions meant for penetration testers, web application developers and security professionals etc.
    Downloads: 5 This Week
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  • 21
    myrtille

    myrtille

    A native HTML4 / HTML5 Remote Desktop Protocol client

    Myrtille is a simple way to connect remote desktops and applications from a native web browser, without plugin, extension or configuration. For the end user, there is just need for a browser. Server side, it uses the .NET (C#) framework and the RDP protocol through an HTTP(S) gateway. It's very comparable to Guacamole (https://github.com/glyptodon) or FreeRDP-WebConnect (https://github.com/FreeRDP/FreeRDP-WebConnect), except it uses the Microsoft .NET (C#) technologies for a better integration with the Remote Desktop Services (RDS) layer. It also support HTML4, in addition to HTML5, for backward compatibility.
    Downloads: 5 This Week
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  • 22
    Addons for any applications supporting the extension mechanism introduced by Mozilla products: Firefox, Thunderbird, Komodo, NVU, Mozilla Suite
    Downloads: 1 This Week
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  • 23
    MBR Cookie Consent

    MBR Cookie Consent

    Enterprise-grade GDPR/CCPA compliant cookie consent with IAB TCF v2.3

    MBR Cookie Consent is the most comprehensive, enterprise-grade cookie consent management plugin for WordPress - completely free. Built for publishers, e-commerce sites, and businesses that take privacy seriously. **100% Free. Forever.** All premium features included at no cost - no upsells, no restrictions, no hidden fees. **Enterprise-Grade.** Used by professional publishers, advertisers, and agencies worldwide. **Easy Setup.** Configure in 5 minutes with intelligent defaults and one-click policy generation.
    Downloads: 4 This Week
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  • 24

    ReorJS

    Distributed Computing with JavaScript

    Create your own distributed computer that can distributed javascript based applications to any computer with a web browser, headless browser or node.js installation. For more information and updates please see our website - http://reorjs.com.
    Downloads: 4 This Week
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  • 25
    See Passwords

    See Passwords

    An add-on for Firefox to show passwords in web pages

    Displays all passwords of web pages with just one click with this handy extension dedicated to the Firefox browser Firefox add-on: http://mzl.la/1LuZIMd Opera extension: http://bit.ly/1VDjrZn
    Downloads: 4 This Week
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