Rust has first-class support for WebAssembly core and WebAssembly components via the available targets in the toolchain:
A Tale of Three WebAssembly Runtimes
Walking through the implementation of three different WebAssembly runtimes from scratch
WebAssembly and its platform targets
When talking about WebAssembly, one of the things that often confuses people is the lack of a great analogy for the various platform targets that WebAssembly supports. This ends up being a bit important as it dictates whether your WebAssembly code will (not) work with another bit as it all
A practical guide to WebAssembly memory | radu's blog
Memory in WebAssembly is one of the topics that creates confusion for newcomers, particularly for those with experience in languages with memory management features like garbage collection, such as JavaScript, Go, or Java. In this article we explore using memory in WebAssembly in various scenarios - passing JavaScript arrays to Rust and AssemblyScript modules, checking for some basic memory leaks using Valgrind, or exchanging strings between runtimes and modules using Wasmtime.
Issues · WebAssembly/component-model
Repository for design and specification of the Component Model - Issues · WebAssembly/component-model
extism/extism
The framework for building with WebAssembly (wasm). Easily & securely load wasm modules, move data, call functions, and build extensible apps.
extism/extism
The framework for building with WebAssembly (wasm). Easily & securely load wasm modules, move data, call functions, and build extensible apps.
Writing a Web-based Editor from Scratch
At some point a while back I decided that I was going to write the front end of Weaver in Rust. I'd looked through the various 'fullstack' web application frameworks kicking around, and while they still had a ways to go, they seemed complete enough. Plus I wanted to write a semi-custom Markdown parser and renderer, to support features I wanted to exist in Weaver, like atproto record embeds, dual-column mode, and resizable images, and since I also wanted it to be fast, that meant that at least a portion of the front-end codebase would be in Rust, and Javascript-Rust FFI wasn't something I had dealt with a lot yet.
WebAssembly Core Specification
Please check the errata for any errors or issues reported since publication.
Instructions — WebAssembly 3.0 (2026-06-03)
WebAssembly computation is performed by executing individual instructions.
Why is WebAssembly a second-class language on the web? – Mozilla Hacks - the Web developer blog
This post is an expanded version of a presentation I gave at the recent WebAssembly CG meeting in Munich. WebAssembly has come a long way since its first release in 2017. The 1.0 version of WebAssembly was already a great fit for low-level languages like C and C++, and immediately enabled many new kinds of applications to efficiently target the web.
WebAssembly
WebAssembly (abbreviated Wasm) is a binary instruction format for a stack-based virtual machine. Wasm is designed as a portable compilation target for programming languages, enabling deployment on the web for client and server applications.
Making Rust Workers reliable: panic and abort recovery in wasm‑bindgen
Panics in Rust Workers were historically fatal, poisoning the entire instance. By collaborating upstream on the wasm‑bindgen project, Rust Workers now support resilient critical error recovery, including panic unwinding using WebAssembly Exception Handling.
Port of Linux to WebAssembly - Joel Severin
Announcing Topcoat: a framework for building full-stack reactive web apps with Rust | Tokio - An asynchronous Rust runtime
Tokio is a runtime for writing reliable asynchronous applications with Rust. It provides async I/O, networking, scheduling, timers, and more.