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.
LZ or LZIP is an archive file that uses LZMA algorithm while compressing. LZ files can be created from several UNIX based tools like GZIP and BZIP2. It can compress multiple files and produce a multivolume archives. It can check the integrity of the file using a checksum.