Client-side Streaming ZIP Generator

client-zip is a lightweight, dependency-free JavaScript library for client-side generation of streaming ZIP archives directly in the browser. It allows developers to concatenate multiple files, often fetched from HTTP requests, into a single downloadable ZIP file without server-side processing. The current stable version is 2.5.0, with regular patch and minor releases indicating active maintenance. Key differentiators include its small bundle size (2.6kB gzipped), superior performance compared to alternatives like JSZip (reportedly 40x faster), and native support for modern browser streaming APIs. It handles Zip64 archives, necessary for large files, though this means generated ZIPs require a reader compatible with "ZIP version 4.5" and may not be universally readable by all older ZIP utilities. It does not perform file compression or unzipping.