Maybe this is not the first program you have seen it does it, but this one have to be highlighted because of its easiness and accuracy.
Perhaps when you first run it, you will be shocked because it seems to be difficult, but don’t worry, it is really easy to use, you will not need all the options offered to perform simple actions.
Bulk Rename Utility offers you up to 13 ways of renaming files and folders. Add text instead of numbers, choose a serie of numbers, modify Capital letters,...
However if you don’t want to have any problem, just choose the name of the file you want to have and press ok, and it will change the name, or maybe if you want to change the name to several files, select all of them and establish a routine. That’s all.
Easy and accurate and free, do you need anything else?