ArchView is an extension of Firefox, which can open archive file online without downloading the whole archive. ArchView supports RAR and ZIP formats over HTTP or FTP protocols, and it can also open local files via file: protocol. This software will present data via XUL or HTML interface. ArchView doesn't intend to replace other archivers (eg. 7-Zip, WinZip or WinRAR). It lacks some features, and can't add or delete files in an archive. ArchView doesn't support compression, and has no plan to realize it. ArchView is a companion and supplementation of these tools, since they are designed to handle local files.