DevConverter converts your archives online. Amongst many others, we support ZIP, RAR, TAR.GZ and 7Z. No need to download any software like WinRAR or 7ZIP.
Z is a UNIX based data compressor which is based on lossless compression algorithm. Z is used to in magnetic tape to create backup in compress files. It supports almost all the compression software. Very recently Z is replaced by GZ in UNIX.