ELI5: webassembly

What is WebAssembly?

WebAssembly (Wasm) is like a super-fast language that computers understand, kind of like how your brain understands English but a computer understands a different code [1][3]. It lets you run programs really quickly inside your web browser, similar to how your calculator can do math much faster than you can write it down [4].

Why do we need it?

Regular websites use JavaScript, which is like giving instructions in plain English - the browser has to translate it every time [3]. WebAssembly is like pre-translating those instructions into computer language, so the browser can run them super fast without waiting [4].

What can you do with it?

You can write programs in languages like C++ or Rust, then turn them into WebAssembly so they run in your browser [1][3]. This means you can play fancy 3D games, edit videos, or use powerful tools right on the internet [5].

When would you use it?

You use WebAssembly when you need things to be really fast, like games, video editors, or scientific programs - basically anything that needs the browser to do heavy work quickly [4].