File Splitz. is a Windows utility program that will split any file into smaller pieces of any size and later combine the pieces to form the original file. Split large files (of any size or type), then easily rejoin with the use of this software. Easily break up large files (no limits, splits any sized file) for copying to floppy or sending via email, as anyone can recreate the original file with this software. File Splitz. is very useful in solving number of problems.