Instant $10 Rebate - Regular Price $29.95! Easily Split Large Files. The Software Oasis File Splitter Utility is a Windows program that makes splitting files simple. The utility will safely split any file into pieces of any size and then later combine the pieces to form the original file. A streamlined user interface provides everything you need to quickly and securely split any file format. Place your split files on multiple disks email your files or transport them from one computer to another.