WebAssembly is a bytecode representation that is meant to be targeted by high-level programming languages such as C++ and to be executed inside a virtual machine in a browser. From Qt's perspective, WebAssembly is just another target platform. Starting with Qt 5.13.0, it is an officially supported target platform for selected, relevant modules. You can download the binary builds on Linux, macOS and Windows host platforms and build your Qt applications to be run inside a web browser. Below are some examples and demos that we have prepared to show Qt running in a browser. More examples will be added here later.
WebAssembly support in browsers is evolving rapidly. We currently recommend using Chrome or Firefox for the best possible experience.