MY ONE BLOGby Manishdai
Software Development

What is WebAssembly?

Quick answer

A compact binary format that lets code written in languages like C++, Rust, and Go run in web browsers at near-native speed.

WebAssembly, explained

WebAssembly, often shortened to Wasm, became an official W3C standard in 2019 and is supported by all major browsers. Developers compile code from other languages into Wasm modules, which run safely in a sandbox alongside JavaScript.

This allows demanding applications to run in the browser that were once only practical as desktop software, such as photo and video editors, 3D games, CAD tools, and scientific simulations. For example, an image-processing library written in C++ can be compiled to WebAssembly and used directly on a web page. Wasm is also gaining ground outside the browser, on servers, edge platforms, and plugin systems, thanks to its portability, fast startup, and strong isolation.

Related terms

Edge Computing

Processing data close to where it is generated, such as on devices or local servers, instead of sending everything to a distant data center.

Frontend

The part of an application that users see and interact with directly, such as web pages and app screens.

JavaScript

The programming language of the web, used to make websites interactive and, with Node.js, to build servers and tools.

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