Short description of RarZilla Free Unrar Portable 2.55: Optimized RarZilla-Version for mobile purposes: RarZilla Free Unrar Portable is smaller, optimized for mobile use - e.g. on an USB-Stick - and comes without setup routine. RarZilla Free Unrar is a free tool to quickly decompress RAR-archives. It supports spanned archives. Decompression can be started by drag 'n' drop. To speed the whole process up, RarZilla has the option to define a default output folder or a default password or both.