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

  • Enterprise-grade ITSM, for every business Icon
    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity.

    Freshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
    Try it Free
  • Try Google Cloud Risk-Free With $300 in Credit Icon
    Try Google Cloud Risk-Free With $300 in Credit

    No hidden charges. No surprise bills. Cancel anytime.

    Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.
    Start Free
  • 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: 71 This Week
    Last Update:
    See Project
  • 2
    Node.js

    Node.js

    Cross-platform JavaScript runtime environment

    Node.js is a free, open-source, cross-platform JavaScript runtime environment that allows developers to run JavaScript outside of the browser. It is built on Chrome’s V8 engine and is designed for building fast, scalable network applications. Node.js enables developers to create servers, APIs, command-line tools, and full-stack web applications using a single programming language. Its non-blocking, event-driven architecture makes it highly efficient for handling concurrent requests. The ecosystem is supported by npm, one of the largest package managers, providing access to thousands of libraries and tools. Node.js is widely used for backend development, real-time applications, and microservices architectures.
    Downloads: 23 This Week
    Last Update:
    See Project
  • 3
    DragonBones Runtime

    DragonBones Runtime

    DragonBones TypeScript / JavaScript Runtime

    DragonBonesJS is a runtime for the DragonBones 2D skeletal animation system, allowing developers to load and animate character rigs in JavaScript-based game engines like PixiJS and Egret.
    Downloads: 20 This Week
    Last Update:
    See Project
  • 4
    Boa

    Boa

    Embeddable and experimental Javascript engine written in Rust

    This is an experimental Javascript lexer, parser and interpreter written in Rust. Currently, it has support for some of the language.
    Downloads: 1 This Week
    Last Update:
    See Project
  • Full-stack observability with actually useful AI | Grafana Cloud Icon
    Full-stack observability with actually useful AI | Grafana Cloud

    Our generous forever free tier includes the full platform, including the AI Assistant, for 3 users with 10k metrics, 50GB logs, and 50GB traces.

    Built on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
    Create free account
  • 5
    BeepBeep
    Lightweight runtime monitor for AJAX web applications that checks in real time whether XML messages received and sent by the application satisfy a predefined interface specification. Complex message sequences and data values are supported.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    ChakraCore

    ChakraCore

    ChakraCore is an open source Javascript engine with a C API

    ChakraCore is a JavaScript engine with a C API you can use to add support for JavaScript to any C or C compatible project. It can be compiled for x64 processors on Linux macOS and Windows. And x86 and ARM for Windows only. It is a future goal to support x86 and ARM processors on Linux and ARM on macOS. As you may have heard Microsoft Edge no longer uses Chakra. Microsoft will continue to provide security updates for ChakraCore 1.11 until 9th March 2021 but do not intend to support it after that. ChakraCore is planned to continue as a community project targeted primarily at embedded use cases. We hope to produce future releases with new features and enhancements to support such use cases. You can build ChakraCore on Windows 7 SP1 or above, and Windows Server 2008 R2 or above, with either Visual Studio 2015 or 2017 with C++ support installed.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    JerryScript

    JerryScript

    Ultra-lightweight JavaScript engine for the Internet of Things

    JerryScript is a lightweight JavaScript engine for resource-constrained devices such as microcontrollers. It can run on devices with less than 64 KB of RAM and less than 200 KB of flash memory.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Just JavaScript

    Just JavaScript

    the only javascript runtime to hit no.1 on techempower

    The only javascript runtime to hit no.1 on techempower.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    KafkaJS

    KafkaJS

    A modern Apache Kafka client for node.js

    KafkaJS is a modern Apache Kafka client for Node.js, designed to be simple, reliable, and fully featured, supporting the latest Kafka features.
    Downloads: 0 This Week
    Last Update:
    See Project
  • AI-generated apps that pass security review Icon
    AI-generated apps that pass security review

    Stop waiting on engineering. Build production-ready internal tools with AI—on your company data, in your cloud.

    Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.
    Try Retool free
  • 10
    Lightning Web Components

    Lightning Web Components

    A Blazing Fast, Enterprise-Grade Web Components Foundation

    Lean, lightweight runtime optimized for performance, with minimal boilerplate code. Lightning Web Components uses standard HTML, modern JavaScript (ES6+), and the best of native Web Components. Leave abstractions behind and build custom elements with HTML, JavaScript, and CSS. Lightning web components are custom elements built using HTML and modern JavaScript. Ready to learn more? Check out the Developer Guide and write code in the Playground. You’ll be up and running in no time. Create fast, versatile web components and apps using the stack and tools your team prefers. Shape the framework through your pull requests and help push native Web Components forward. Use the latest web standards to build robust components that run in modern browsers and IE 11. Follow the instructions in your terminal. For Select a type of project, choose Single Page App and choose LWC as the variant.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    NativeScript iOS

    NativeScript iOS

    NativeScript for iOS and visionOS using V8

    The nativescript-ios repository contains the runtime and core modules necessary for building and running NativeScript applications on iOS devices, enabling developers to create native iOS apps using JavaScript or TypeScript.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    ReNative

    ReNative

    Unified Development Platform for iOS, tvOS, Android, Android TV

    ReNative allows you to bootstrap, develop and deploy apps for mobile, web, TVs, desktops, consoles, wearables, and more via a single development environment. ReNative supports standard community-driven react-native plugins you can use to enhance the functionality of your apps. ReNative allows you to build powerful multi-platform bootstrap templates. ReNative supports integrations for various services and deployment infrastructures for your apps. Tired of setting up and managing countless various projects? you can go as simple as a most basic JSON config file to get yourself up and running. Sometimes you need to extend CLI functionality with custom build scripts. ReNative makes this easy for you. ReNative runtime is an NPM dependency to help abstract away some of the complexities of building UI interfaces and features for a large number of target platforms and devices.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    iOS Runtime for NativeScript

    iOS Runtime for NativeScript

    NativeScript for iOS using JavaScriptCore

    ios-jsc is a JavaScriptCore framework for iOS, utilized by NativeScript to execute JavaScript code within iOS applications. It provides a high-performance JavaScript engine that enables the execution of JavaScript in a native iOS environment.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • Next
MongoDB Logo MongoDB