Intro: What is Wasm?
The stack machine, why & where Wasm runs, your first module. Start →
WebAssembly — From Zero to Hero
A standalone, beginner→advanced course on WebAssembly. Write WAT and watch it compile and run in your browser, master JS interop and linear memory, then compile real languages to Wasm and go beyond the browser with WASI.
What you’ll learn
Section titled “What you’ll learn”The WAT Text Format
Modules, funcs, value types, locals & the stack, arithmetic. Write WAT →
Control Flow & Functions
Blocks, branches, loops, if/else, calls & recursion. Branch →
JS Interop & Loading
instantiate, imports & exports, streaming, number marshalling. Interop →
Linear Memory & Data
The shared ArrayBuffer, typed-array views, passing strings, growing. Memory →
Languages to Wasm
Rust (wasm-bindgen), C (Emscripten), AssemblyScript, choosing one. Compile →
Tooling
wabt, Binaryen (wasm-opt), inspecting & optimizing .wasm. Tools →
WASI & Beyond the Browser
WASI, wasmtime/wasmer, the component model, real-world use cases. Go further →
How this course works
Section titled “How this course works”Runs in your browser
Write WAT and click Run — it compiles to Wasm and executes right here, with real output. No install.
Diagrams that explain
The stack machine, caching of the compile→instantiate flow, and memory layout as Mermaid diagrams.
Real toolchains
Compile Rust, C, and AssemblyScript to Wasm — open runnable AssemblyScript projects in StackBlitz.
Bilingual + read mode
English and ไทย, quizzes with saved progress, and a distraction-free read mode.