Mozilla's authoritative reference documentation for the WebAssembly JavaScript API and WAT text format.
MDN's WebAssembly documentation is the definitive reference for the browser-side WebAssembly API. It covers the full JavaScript API (WebAssembly.instantiate, WebAssembly.Memory, WebAssembly.Table, WebAssembly.compile, and all associated types), the WAT text format, WebAssembly concepts and goals, and practical loading patterns. MDN also maintains concept guides explaining how Wasm's linear memory model, sandboxing, and module system work. For developers who need an authoritative, well-maintained reference rather than a tutorial, MDN is the first stop.
The current canonical guide to building Wasm components with Rust — covers cargo-component, Jco, and the full Rust → component → browser/Node path.
The WebAssembly Binary Toolkit — essential tools for inspecting, converting, and validating Wasm binaries.
Mozilla's standalone WebAssembly engine built on SpiderMonkey — a fast JS-in-Wasm runtime used in production at Fastly and Fermyon.