WebAssembly (Wasm) is a modern web technology that represents a binary code format executed in the browser with high performance. Unlike JavaScript, Wasm is not a programming language—it is a compact bytecode that the browser runs at near-native speed.
The primary goal of WebAssembly is to enable the efficient execution of resource-intensive tasks directly in the browser. This makes it possible to use languages like C, C++, and Rust for web development by compiling them into Wasm modules. Full security is ensured through isolated execution in a sandbox.
WebAssembly works alongside JavaScript; it does not replace it. Developers can use both technologies together—for example, by calling Wasm functions from JavaScript and vice versa. This is particularly in demand for complex web applications like games, video editors, design systems, and scientific simulations where performance is critical.
The technology is supported by all modern browsers and continues to evolve actively, expanding the capabilities of the web platform for solving complex computational tasks.