WinRAR can be used to back up your data and reduce the size of files. It has the ability to create archives of ZIP and RAR formats. It can also be used to unpack CAB, ARJ, LZH, TAR, GZ, UUE, BZ2, JAR, ISO, 7Z, XZ, and Z archives. WinRAR provides both a graphic interactive as well as commandline tools. RAR archives can be encrypted using AES (Advanced Encryption Standard) with a key of 256 bits.