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About WebAssembly

Key Features of WebAssembly


Simple Syntax

Simpler than native assembly languages, offering a good onramp to systems programming.


Optimized for fast (just-in-time) compilation to native code and raw execution speed.


Libraries reuse across languages and ecosystems. Executables run on desktops and servers.

Designed by a committee

A vendor-neutral W3C standard with numerous contributors from research labs and industry.


While a core MVP is production-ready, numerous proposals will expand WebAssembly in the future.

JavaScript Interopability

WebAssembly is a first-class citizen of the web with excellent interoperability with JavaScript.

Get mentored the WebAssembly way

Every language has its own way of doing things. WebAssembly is no different. Our mentors will help you learn to think like a WebAssembly developer and how to write idiomatic code in WebAssembly. Once you've solved an exercise, submit it to our volunteer team, and they'll give you hints, ideas, and feedback on how to make it feel more like what you'd normally see in WebAssembly - they'll help you discover the things you don't know that you don't know.

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Community-sourced WebAssembly exercises

The WebAssembly track on Exercism has 25 exercises to help you write better code. Discover new exercises as you progress and get engrossed in learning new concepts and improving the way you currently write.

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The best part, it’s 100% free for everyone.