How to Rename File Extensions
Renaming File Extensions can be very handy when trying to convert one
file name to another. There are many programs on the web that can help
you do this. But are you aware that windows operating systems can do this
for you? Below are instructions on how to do so.
Go to Start
Click on the 'View' Tab
Then simply uncheck 'Hide extensions for known file types'.
Then click Apply
Finally click Ok
Now you will be able to change file extensions, such as .JPG to .jpg.