node-libzim is a Node.js binding for the libzim library, enabling developers to read and write ZIM files—a compressed, open-format file type for offline web content—directly in JavaScript. It is designed for developers working with ZIM files, such as those in the OpenZIM ecosystem, who need to integrate ZIM file handling into Node.js applications. The library supports both writing new ZIM files and reading existing ones, with features like indexing, searching, and content retrieval.