wasm-pack is a command-line tool that simplifies building, testing, and publishing Rust-generated WebAssembly (Wasm) packages to npm. It streamlines the often-complex process of compiling Rust to Wasm, creating necessary JavaScript bindings, and generating the package.json file required for npm distribution. Automating key steps make it easy for developers to share Rust-powered Wasm modules for use in web applications. Offers features like optimized builds and integration with testing frameworks.