How to change the extension of all selected files at once?

Question

Its possible to rename files all at once. But its not possible to change the extension of selected files all at once.

If windows doesn't support this facility .. then is there any batch script or something to work out with ???

Answer 1

Command prompt example:

rename *.html *.htm

will rename all files with .html extension in the current directory to .htm

Answer 2

You can use Total Commander that allows mass renaming in many ways...