PeaZip
PeaZip is a multi-functional archive handler available for the Windows and Linux operating systems. Apart from compressing, decompressing, and encrypting archives, it can also be used as a file manager and a converter.
PeaZip can directly convert one compressed file type into another without having to expand it, since it supports a variety of compression standards. It can also edit files inside archives and compressed files without extracting them.