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

  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
    Start Free
  • $300 Free Credits to Build on Google Cloud Icon
    $300 Free Credits to Build on Google Cloud

    New customers can spin up VMs, build with AI, and query data at no cost.

    Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.
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  • 1
    Node-RED

    Node-RED

    Low-code programming for event-driven applications

    Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways. It provides a browser-based editor that makes it easy to wire together flows using the wide range of nodes in the palette that can be deployed to its runtime in a single-click. Node-RED provides a browser-based flow editor that makes it easy to wire together flows using the wide range of nodes in the palette. Flows can be then deployed to the runtime in a single-click. JavaScript functions can be created within the editor using a rich text editor. A built-in library allows you to save useful functions, templates or flows for re-use. The light-weight runtime is built on Node.js, taking full advantage of its event-driven, non-blocking model. This makes it ideal to run at the edge of the network on low-cost hardware such as the Raspberry Pi as well as in the cloud.
    Downloads: 56 This Week
    Last Update:
    See Project
  • 2
    Create React App

    Create React App

    Set up a modern web app by running one command

    Create React App lets you create React apps quickly and easily-- no learning of build tools or build configurations necessary. All you need is one command, and you can get started in seconds. All tools are preconfigured and hidden, and with instant reloads you can focus on code, not build tools. With Create React App your apps need only one build dependency, so everything works together seamlessly, and when it’s time to deploy your bundles are automatically optimized. With Create React App it’s easy to start and easy to “eject”, if ever you want an advanced configuration and edit config files directly. It’s also very easy to maintain, as you only need a single command to upgrade to new versions.
    Downloads: 16 This Week
    Last Update:
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  • 3
    Vue Native

    Vue Native

    Vue Native is a framework to build cross platform native mobile apps

    Vue Native is a framework to build cross-platform native mobile apps using JavaScript. It is a wrapper around the APIs of React Native. So, with Vue Native, you can do everything that you can do with React Native. With Vue Native, you get the simplicity of Vue.js. Incrementally build user interfaces with the familiar syntax of HTML and CSS in single file components. Seamless interop with React Native. Use core React Native components with Vue.js syntax out of the box to develop mobile apps on both iOS and Android. The Vue Native CLI can be used to easily generate a fully configured Vue Native app. It wraps expo-cli and react-native-cli to generate a simple single page application (SPA) after installing and configuring dependencies from vue-native-core. You should have either expo-cli or react-native-cli installed as a global dependency.
    Downloads: 13 This Week
    Last Update:
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  • 4
    Pencil

    Pencil

    The Pencil Project's unique mission is to build a free tool

    Pencil is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms. The latest stable version of Pencil is 3.1.0 which contains stability fixes and many new features. More details can befound in the releaste notes. Pencil provides various built-in shapes collection for drawing different types of user interface ranging from desktop to mobile platforms. Starting from 2.0.2, Pencil is shipped with Android and iOS UI stencils pre-installed. This makes it even easier to start protyping apps with a simple installation. Starting from 2.0.2 Pencil has even more shape collections included by default. The list of built-in collections now includes general-purpose shapes, flowchart elements, desktop/web UI shapes, Android and iOS GUI shapes.
    Downloads: 12 This Week
    Last Update:
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  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
    Start Free
  • 5
    Browsersync

    Browsersync

    Keep multiple browsers & devices in sync when building websites

    With each web page, device and browser, testing time grows exponentially. From live reloads to URL pushing, form replication to click mirroring, Browsersync cuts out repetitive manual tasks. It’s like an extra pair of hands. Customise an array of sync settings from the UI or command line to create a personalised test environment. Need more control? Browsersync is easily integrated with your web platform, build tools, and other Node.js projects. Built on Node.JS_ENTRY to support Windows, MacOS and Linux. Setup in less than 5 minutes. Browsersync is an open source project available to use under the Apache 2.0 License. Easily integrated with task runners like Grunt and Gulp, or included in other Node projects. Test your website against a slower connection. Even when devices are connected to wifi. Your scroll, click, refresh and form actions are mirrored between browsers while you test.
    Downloads: 10 This Week
    Last Update:
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  • 6
    SuperAgent

    SuperAgent

    Ajax for Node.js and browsers (JS HTTP client)

    SuperAgent is light-weight progressive ajax API crafted for flexibility, readability, and a low learning curve after being frustrated with many of the existing request APIs. It also works with Node.js! Small progressive client-side HTTP request library, and Node.js module with the same API, supporting many high-level HTTP client features. Browser-ready versions of this module are available via jsdelivr, unpkg, and also in the node_modules/superagent/dist folder in downloads of the superagent package. If you are using browserify, webpack, rollup, or another bundler, then you can follow the same usage as Node. SuperAgent is easily extended via plugins. The Node client supports making requests to Unix Domain Sockets. DELETE, HEAD, PATCH, POST, and PUT requests can also be used, simply change the method name. Absolute URLs can be used. In web browsers absolute URLs work only if the server implements CORS.
    Downloads: 10 This Week
    Last Update:
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  • 7
    Mithril.js

    Mithril.js

    A JavaScript framework for building brilliant applications

    Mithril is a modern client-side JavaScript framework for building Single Page Applications. It's small (< 10kb gzip), fast and provides routing and XHR utilities out of the box. Mithril is used by companies like Vimeo and Nike, and open source platforms like Lichess. Mithril supports IE11, Firefox ESR, and the last two versions of Firefox, Edge, Safari, and Chrome. No polyfills required. By default, Mithril views are described using hyperscript. Hyperscript offers a terse syntax that can be indented more naturally than HTML for complex tags, and since its syntax is just JavaScript, it's possible to leverage a lot of JavaScript tooling ecosystem. Mithril is all about getting meaningful work done efficiently. Doing file uploads? The docs show you how. Authentication? Documented too. Exit animations? You got it. No extra libraries, no magic.
    Downloads: 9 This Week
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  • 8
    Parcel

    Parcel

    The zero configuration build tool for the web

    Parcel combines a great out-of-the-box development experience with a scalable architecture that can take your project from just getting started to a massive production application. Parcel starts with a great development experience, from starting a new project to iterating and debugging, and shipping to production. No more fiddling with configuration, or spending hours to keep up with best practices – it just works! Parcel supports many languages and file types out of the box, from web technologies like HTML, CSS, and JavaScript, to assets like images, fonts, videos, and more. And when you use a file type that isn't included by default, Parcel will automatically install all of the necessary plugins and dev dependencies for you! Parcel includes a development server out of the box. Just run parcel index.html to get started. When you make a change, Parcel automatically updates your code in the browser, no page reload necessary!
    Downloads: 9 This Week
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  • 9
    SQUEEZER

    SQUEEZER

    Squeezer framework, build serverless dApps

    Squeezer is a platform that empowers new-entry blockchain developers to build serverless dApps simply as dead. The main usage of the ChainKit is to unify top blockchains interfaces into a single normalized API interface, therefore you can build blockchain dApps easily without digging into blockchain complex infrastructure. Bi-directional on-chain transactions (inbound and outbound). Build dApps connecting to smart contracts using chain kit agnostic connector. Quick intuitive code deployments by using a special mechanism that will deploy smart contracts and dApp services where code changed. Silent deployments, no interruption for the current functionality (really useful on production). One single command to simultaneously deploy all available functions on your project where code changed from the last deployment. Test your code locally on a simulated functions platform for a faster development cycle.
    Downloads: 9 This Week
    Last Update:
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  • Fully Managed MySQL, PostgreSQL, and SQL Server Icon
    Fully Managed MySQL, PostgreSQL, and SQL Server

    Automatic backups, patching, replication, and failover. Focus on your app, not your database.

    Cloud SQL handles your database ops end to end, so you can focus on your app.
    Start Free
  • 10
    rax

    rax

    A progressive React framework for building universal application

    Ultra-lightweight, high-performance, easy-to-use front-end solution. One-time development and multi-terminal operation, liberating repetitive work, focusing on product logic, and improving development efficiency. The Rax 1.0 system provides a wealth of components and APIs to help business students quickly develop multi-terminal projects. Go Rax is a Rax 1.0 sample app, which is provided for Rax developers for reference and learning. Rax improves the product experience through a lighter core, progressive web applications, and server-side rendering. The out-of-the-box engineering, rich components and surrounding ecology, and one-time development and multi-end delivery help the developer complete his creativity. At the same time, we are also continuing to explore in the field of artificial intelligence, and continue to reduce development thresholds and costs.
    Downloads: 9 This Week
    Last Update:
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  • 11
    Backpack

    Backpack

    Backpack is a minimalistic build system for Node.js projects

    Backpack is a minimalistic build system for Node.js. Inspired by Facebook's create-react-app, Zeit's Next.js, and Remy's Nodemon, Backpack lets you create modern Node.js apps and services with zero configuration. Backpack handles all the file-watching, live-reloading, transpiling, and bundling, so you don't have to. It comes with a few conventions defaults (like support for the latest JavaScript awesomeness (i.e. async/await, object rest spread, and class properties)), but everything can be customized to fit your project's needs. Best of all, you can easily add Backpack to your existing Node.js project with just a single dependency. To extend our usage of babel, you can define a .babelrc file at the root of your app. This file is optional. Backpack is focused on server-only applications. You should use create-react-app or Next.js for your frontend and then build your backend with Backpack.
    Downloads: 8 This Week
    Last Update:
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  • 12
    Brunch

    Brunch

    Web applications made easy

    Brunch lets you focus on what matters most, solving real problems instead of messing around with the glue. By being opinionated about your build pipeline, Brunch is able to provide a smooth and fast experience, and makes your config files take a drastic cut. It doesn't take much to get around with brunch. 'brunch new' to create a new project. 'brunch build' to build. 'brunch watch' to live-compile. Installation is one-line, once you have node.js. You will find that the typical config of a Brunch application is an order of magnitude simpler, compared to Webpack, Grunt, or Gulp. Besides configs, brunch is also simpler in terms of commands. Grunt / Gulp commands replicate all plugins it loads. Brunch always has three commands: new, build and watch. Build / watch commands may receive optional production flag which will tell Brunch to optimize assets, javascripts and stylesheets.
    Downloads: 8 This Week
    Last Update:
    See Project
  • 13
    Relay

    Relay

    JavaScript framework for building data-driven React applications

    Relay is data-fetching turned declarative. Components declare their data dependencies, without worrying about how to fetch them. Relay guarantees that the data each component needs is fetched and available. This keeps components decoupled and promotes reuse. With Relay, components and their data dependencies can be quickly modified without modifying other parts of the system. That means you won't accidentally break other components as you refactor or make changes to your app. Relay's compiler aggregates and optimizes the data requirements for your entire app, so that they can be efficiently fetched in a single GraphQL request. Relay handles the heavy lifting to ensure the data declared by your components is fetched in the most efficient way. For example, by deduplicating identical fields, and precomputing information used at runtime, among other optimizations. Relay also supports executing GraphQL Mutations, optionally with optimistic updates, and updates to local data.
    Downloads: 8 This Week
    Last Update:
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  • 14
    V Programming Language

    V Programming Language

    Simple, fast, safe, compiled language for developing software

    Simple language for building maintainable programs. You can learn the entire language by going through the documentation over a weekend, and in most cases, there's only one way to do something. This results in simple, readable, and maintainable code. Despite being simple, V gives a lot of power to the developer and can be used in pretty much every field, including systems programming, webdev, gamedev, GUI, mobile, science, embedded, tooling, etc. V avoids doing unnecessary allocations in the first place by using value types, and string buffers, promoting a simple abstraction-free code style. Most objects (~90-100%) are freed by V's auto-free engine: the compiler inserts necessary free calls automatically during compilation. A remaining small percentage of objects is freed via GC. The developer doesn't need to change anything in their code. "It just works", like in Python, Go, or Java, except there's no heavy GC tracing everything or expensive RC for each object.
    Downloads: 8 This Week
    Last Update:
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  • 15
    Vue Loader

    Vue Loader

    Webpack loader for Vue.js components

    vue-loader is a loader for webpack that allows you to author Vue components in a format called Single-File Components (SFCs). Allows using other webpack loaders for each part of a Vue component. Allows custom blocks in a .vue file that can have custom loader chains applied to them. Treat static assets referenced in <style> and <template> as module dependencies and handle them with webpack loaders. Simulate scoped CSS for each component. State-preserving hot-reloading during development. In a nutshell, the combination of webpack and vue-loader gives you a modern, flexible and extremely powerful front-end workflow for authoring Vue.js applications. vue-loader is not a simple source transform loader. It handles each language blocks inside an SFC with its own dedicated loader chain (you can think of each block as a "virtual module"), and finally assembles the blocks together into the final module.
    Downloads: 8 This Week
    Last Update:
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  • 16
    babel-plugin-react-css-modules

    babel-plugin-react-css-modules

    Transforms styleName to className using compile time CSS module

    babel-plugin-react-css-modules is a Babel plugin that enhances the use of CSS Modules in React applications by allowing developers to write cleaner and more intuitive styling code. It automatically maps CSS class names to scoped identifiers, eliminating the need to manually import and reference style objects. The plugin improves developer experience by enabling the use of standard className syntax while still benefiting from the encapsulation provided by CSS Modules. It also supports advanced features such as conditional class names and multiple class assignments. The tool integrates seamlessly into modern React build pipelines, making it compatible with existing workflows. It helps maintain consistent and collision-free styling across large applications. Overall, babel-plugin-react-css-modules simplifies the process of managing scoped styles in React projects.
    Downloads: 8 This Week
    Last Update:
    See Project
  • 17
    nivo

    nivo

    A rich set of dataviz components

    nivo provides a rich set of dataviz components, built on top of the awesome d3 and Reactjs libraries. Several libraries already exist for React d3 integration, but just a few provide server side rendering ability and fully declarative charts. In order to use nivo, you have to install the @nivo/core package and then choose some of the scoped @nivo packages according to the charts you wish to use. Given an array of data series having an id and a nested array of points (with x, y properties), it will compute the line for each data series. All datum having null x or y will be treated as holes, thus portions of the corresponding line will be skipped. You can fully customize it using the circleComponent property to define your own, if you wish to do so you should have a look at the default SVG component to get started. Bar chart which can display multiple data series, stacked or side by side. Also supports both vertical and horizontal layout, with negative values descending below the x axis.
    Downloads: 8 This Week
    Last Update:
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  • 18
    Essential React

    Essential React

    A minimal skeleton for building testable React apps using Babel

    A minimal skeleton for building testable React apps using Babel. The design goals are to use fewer tools (no yeoman, gulp, bower, etc...) Babel 6 with Webpack and Hot Loader. Fast testing with mocked-out DOM. Import CSS files as class names. Separate smart and dumb components. No specific implementation of Flux or data fetching patterns. A core philosophy of this skeleton app is to keep the tooling to a minimum. For this reason, you can find all the commands in the scripts section of package.json. This leverages React Hot Loader to automatically start a local dev server and refresh file changes on the fly without reloading the page. It also automatically includes source maps, allowing you to browse code and set breakpoints on the original ES6 code. Build minified app for production using the production shortcut.
    Downloads: 7 This Week
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  • 19
    Marked

    Marked

    A markdown parser and compiler. Built for speed

    A low-level markdown compiler for parsing markdown without caching or blocking for long periods of time. Light-weight while implementing all markdown features from the supported flavors & specifications. Available as a command-line interface (CLI) and running in client- or server-side JavaScript projects. The only completely secure system is the one that doesn't exist in the first place. Having said that, we take the security of Marked very seriously. To prevent ReDoS attacks you can run marked on a worker and terminate it when parsing takes longer than usual. Marked can be run in a worker thread on a node server, or a web worker in a browser. Only current and LTS Node.js versions are supported. End-of-life Node.js versions may become incompatible with Marked at any point in time.
    Downloads: 7 This Week
    Last Update:
    See Project
  • 20
    PWA

    PWA

    (WIP) Universal PWA Builder

    PWA is a “universal, framework-agnostic PWA builder” developed by Luke Edwards (lukeed) that aims to let developers scaffold progressive web apps with minimal friction across different view frameworks or libraries. Unlike many CLI tools that target a specific framework (React, Vue, Svelte), this project intentionally tries to remain agnostic, supporting presets for Preact, React, Vue, Svelte and even vanilla JS, while offering all the PWA boilerplate you need (service workers, manifest, offline support) right out of the box. The project is designed for speed of setup: you run pwa init, choose your preset, then pwa build or pwa watch and you get a production-ready bundle with PWA features baked in. The README emphasizes that modern bundlers (Webpack, Rollup) and ecosystem maturity finally allow a universal CLI of this kind, whereas earlier attempts weren’t practical.
    Downloads: 7 This Week
    Last Update:
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  • 21
    Quasar Framework

    Quasar Framework

    Build high-performance VueJS user interfaces in record time

    Effortlessly build high-performance & high-quality Vue.js 3 user interfaces in record time. Combine the power of Quasar UI with Quasar CLI. One source code for all platforms simultaneously with all the latest and greatest best practices out of the box. Focus only on your app's features and forget about the boilerplate around it. Build high-performance VueJS user interfaces in record time: responsive Single Page Apps, SSR Apps, PWAs, Browser extensions, Hybrid Mobile Apps and Electron Apps. If you want, all using the same codebase! You get a state-of-the-art UI (that follows Material Guidelines) for your websites and apps out of the box. Best support for desktop and mobile browsers (including iOS Safari!) out of the box. Best-in-class support for each build mode (SPA, SSR, PWA, Mobile app, Desktop app & Browser Extension) and the best developer experience through a tight integration with our own CLI.
    Downloads: 7 This Week
    Last Update:
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  • 22
    Victory

    Victory

    React components for building interactive data visualizations

    Victory is a set of modular charting components for React and React Native. Victory makes it easy to get started without sacrificing flexibility. Create one of a kind data visualizations with fully customizable styles and behaviors. Victory uses the same API for web and React Native applications for easy cross-platform charting. Victory is used for charting across the web, from publicly-consumed informational graphs to internal tracking and reporting. Victory is an opinionated, but fully overridable, ecosystem of composable React components. Check out the docs to see how you can get started building interactive data visualizations. Fully contained, reusable data visualization elements are responsible for their own styles and behaviors. Extend the Victory experience on Android and iOS platforms with an identical API.
    Downloads: 7 This Week
    Last Update:
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  • 23
    Webpack Encore

    Webpack Encore

    A simple but powerful API for processing and compiling assets

    Symfony ships with a pure-JavaScript library, called Webpack Encore, that makes it a joy to work with CSS and JavaScript. You can use it, use something else, or create static CSS and JS files in your public/ directory directly and include them in your templates. Webpack Encore is a simpler way to integrate Webpack into your application. It wraps Webpack, giving you a clean & powerful API for bundling JavaScript modules, pre-processing CSS & JS, and compiling and minifying assets. Encore gives you a professional asset system that's a delight to use. Encore is inspired by Webpacker and Mix, but stays in the spirit of Webpack, using its features, concepts and naming conventions for a familiar feel. It aims to solve the most common Webpack use cases. Encore is made by Symfony and works beautifully in Symfony applications. But it can easily be used in any application in any language!
    Downloads: 7 This Week
    Last Update:
    See Project
  • 24
    express-session

    express-session

    Simple session middleware for Express

    This is a Node.js module available through the npm registry. Installation is done using the npm install command provided in the instructions. Create a session middleware with the given options. Session data is not saved in the cookie itself, just the session ID. Session data is stored server-side. Since version 1.5.0, the cookie-parser middleware no longer needs to be used for this module to work. This module now directly reads and writes cookies on req/res. Using cookie-parser may result in issues if the secret is not the same between this module and cookie-parser. The default server-side session storage, MemoryStore, is purposely not designed for a production environment. It will leak memory under most conditions, does not scale past a single process, and is meant for debugging and developing.
    Downloads: 7 This Week
    Last Update:
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  • 25
    Caramel

    Caramel

    Functional language for building type-safe applications

    Caramel is a functional language for building type-safe, scalable, and maintainable applications. It is built in OCaml and maintained by Abstract Machines. Caramel leverages the OCaml compiler, to provide you with a pragmatic type system and industrial-strength type safety, and the Erlang VM, known for running low-latency, distributed, and fault-tolerant systems used in a wide range of industries. Excellent type inference, so you never need to annotate your code. Supports sources in OCaml (and soon Reason syntax too). Caramel aims to make building type-safe concurrent programs a productive and fun experience. Caramel should let anyone with existing OCaml or Reason experience be up and running without having to relearn the entire language. Caramel strives to integrate with the larger ecosystem of BEAM languages, like Erlang, Elixir, Gleam, Purerl, LFE, and Hamler.
    Downloads: 6 This Week
    Last Update:
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