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9 Best Free and Open Source JavaScript Runtime Environments

The JavaScript runtime environment provides your scripts with utility libraries which can be used during execution.

txiki.js is a small and powerful JavaScript runtime. It targets state-of-the-art ECMAScript and aims to be WinterCG compliant.

Just is a very small v8 JavaScript runtime for Linux only.

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Window.js is a JavaScript runtime for desktop graphics programming.

JerryScript is a lightweight JavaScript engine intended to run on very constrained devices such as microcontrollers.

Kit is a lightweight, modular framework for scalable production systems.

WasmEdge is a lightweight, high-performance and extensible WebAssembly runtime for cloud native, edge, and decentralized applications.

Blueboat is a multi-tenant serverless JavaScript runtime with support for encoding, parsing, and transforming different kinds of data

Bun is an all-in-one JavaScript runtime and toolkit designed for speed, complete with a bundler, test runner, and package manager.