Archiver is a streaming archive utility for Node.js and the browser. It supports various archive formats like zip, tar, and others, enabling efficient creation of complex archives with file system-like interfaces. It offers features like file compression, directory archiving, Symlink packaging, streaming directly from sources, and data transformations. Archiver is designed for speed, flexibility, and ease of use, making it ideal for creating backups, distributing software, or for other archival needs within Node.js projects and modern browser environments.