The program's simple interface is very similar to that of the famous WinRAR, with options for creating compressed files or decompressing others above, and a window for navigating your hard drive below.
The compression format is B1, although it also allows you to unzip files in other familiar formats, such as ZIP, RAR, or 7Z.
Of course, once you create compressed files, B1 Free Archiver also allows you to divide the files into parts. This is done easily, since the program includes certain presets: for example, the maximum size allowed by Gmail.
This is undoubtedly and excellent option for quickly zipping and unzipping files with a completely free program.