batch script to rename part of file extension

Question

I am trying to create a fairly simple (at least I thought) script to rename part of file's extension. Example:

ren C:\Users\Joe\Desktop\*.TESTJPG C:\Users\Joe\Desktop\*.JPG

I need it to keep the filename, and keep the last part of the extension. Is this possible?

I tried this but it doesn't work.

ren C:\Users\Joe\Desktop\*.TEST??????????? C:\Users\Joe\Desktop\*.???????????

Thanks for any input.

Answer 1

ren C:\Users\Joe\Desktop\*.TESTJPG *.JPG

should work. You can't have a directoryname in the new filename.

Answer 2

Recently I answered a simillar question here , the same code can help you too:

setlocal enabledelayedexpansion
for /f %%a in ('dir *.test* /b') do (
 set "name=%%a"&set "name=!name:.test=.!"
 ren "%%a" "!name!"
)

Here we are removing the word .test from files extensions. All you need here is place this script on the same directory as your files are and run it.