Wasm is a binary code format specification first released in 2017. This technology can be implemented in web browsers or standalone applications in a secure, open, portable, and efficient fashion. More precisely, Wasm is an intermediate language for a stack-based virtual machine that uses a just-in-time (JIT) compiler to produce native machine code. Although Wasm was primarily designed as a compilation target for languages such as C/C++ or Rust, it can be integrated with Python in interesting ways. And that’s what we’ll be focusing on during this tutorial. Some experience with JavaScript and web development might come in handy but is not strictly required. At the end, we’ll show how to develop a tiny compiler that has Wasm as it’s compilation target.