Rename file extension (uppercase or lowercase)
When batch rename/rename is used it would be a welcome feature request to have an option to make the file extension capitalized, lowercase or change it entirely - this feature could find a spot in Preferences.
I often use Batch Rename and the one thing that I don't like is when I use List View or open up File Explorer some filenames have an uppercase extension and some have a lowercase extension ... but I'm not going to spend the time manually changing the extensions to match.
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DAMacLeod
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Stephen Marsh commented
In the meantime, you can use the following setup to change extensions to uppercase or lowercase.