How to batch rename file extension only

I'm hoping someone can help me figure out how to batch rename a group of file extensions only. I want to keep the name of the files the same, but change the extension to something else. I've looked in the forum, but haven't yet foundhow to accomplish this. Thanking you in advance for your assistance

Standard Rename

Old name: .
New name *.xyx

where xyz is your new extension.

Thank you for your reply and please forgive me for this dumb question i'm about to ask. Do i type in Old name and new name as you have it? what i tried didn't work. not sure what i did wrong. thank you

Yes, that's correct:


Wow, thanks for the quick response and for your help!!!!