nwjs/nw.js

NW.js, originally called node-webkit, is a framework that lets you build desktop applications for Windows, macOS, and Linux using the same web technologies you would use to build a website: HTML, CSS, and JavaScript. The problem it solves is that web developers who already know how to build browser-based interfaces should not have to learn a completely different language or toolchain to create a real desktop app. With NW.js, your web skills translate directly into a native-feeling application. The way it works is by combining two powerful runtimes into a single process. Chromium, the open-source browser engine behind Google Chrome, handles rendering your HTML and CSS and running your JavaScript. Node.js, a runtime that lets JavaScript run outside the browser, handles file system access, networking, and the ability to use any of the hundreds of thousands of packages available through the npm package registry. Crucially, these two environments share the same memory space, so you can call Node.js functions directly from your HTML page without any extra messaging layer. You package your app as a folder containing an HTML entry point and a package.json configuration file, then run it with the NW.js binary. You would use NW.js when you want to ship a desktop application and your team already knows web development. It is a good fit for tools like text editors, file managers, media players, and dashboards where you want native access to the operating system alongside a polished visual interface. The tech stack is JavaScript and HTML on Chromium plus Node.js, and it supports all major desktop platforms.