Flutter, a Google-developed cross-platform app development framework, allows developers to write code once and deploy it on iOS, Android, and now the web with the release of version 1.9. Though still in a technical preview and not production-ready, Flutter’s web support shows promise by enabling minimal changes to existing apps to compile them into HTML, CSS, and JavaScript bundles. Developers can run these web apps on any server, such as Node.js, which is particularly advantageous for handling large volumes of simple requests and integrating with existing Node.js APIs. A practical example is provided through a weather app that retrieves data from a Node.js backend, illustrating how to add web support, address cross-origin resource sharing issues, and compile the app for deployment on a Node.js server. Despite some limitations, such as missing features and performance issues in web support, Flutter’s potential for cross-platform development is significant.