so if you are like me who looks at the keyboard when typing and sometimes forgets that the caps lock is on, this is for you:
tr '[:upper:]' '[:lower:]' < STRING.TXT > output.txt
make an executable file out of that . to use just copy your CAPS TEXT into the STRING.TXT then run the script in the same directory. might have to create a blank file output.txt first too havent checked.
this comes off the internet i didnt make it all up myself.
if someone can make a gui out of it that would be better