JFuse - Version 2.2 JFuse offers two main features. It can split a large file into smaller files, and it can merge files into a larger file. When files get posted on the web in many small parts JFuse can put them back together. This is often the case with movie files. JFuse will let you put parts 1-10 into the same file so it can be viewed without interuption. JFuse allows you to open movie files within the application so you can merge files and immediately view them without having to open a movie player.