WebAssembly (Wasm) is a powerful technology that allows developers to execute low-level bytecode on the web, delivering better performance and smaller sizes compared to JavaScript. Supporting languages like C, C++, Rust, and AssemblyScript, Wasm is available in all major browsers and server runtimes. The article explores the integration of Wasm with JavaScript, particularly using Emscripten, to perform computationally intensive tasks more efficiently. It details a process for applying image filters through Wasm by manipulating image data as a linear array, demonstrating effects like grayscale, invert, noise, and brighten. The text emphasizes the potential of Wasm to revolutionize modern frontend development by enabling more performant web applications, while also noting its relative immaturity and recent advancements. With the help of tools like Emscripten, Wasm is becoming more accessible to frontend developers, promising robust and sophisticated web experiences in the future.