This tool deletes the information from your hard drive on multiple levels, granting you the privacy you want. There are three different modes to better match your needs: random overwriting; U.S. DoD 5220.22-ME; U.S. DoD 5220.22-M ECE; and the Peter Gutmann standard.
It doesn't matter what type of files they are. Jihosoft Eraser can clean the documents without leaving a trace, individually or as a whole, even eliminating the possibility of recovery with software.
Besides all this, the program has other features that can improve your hard drive and clean the partitions, deleting duplicate files and freeing up space that's not being used to speed up performance.