Little batch using Swiss File Knife (SFK) to delete duplicates by type ⚡⚡⚡.
It asks for the location, then the type of file and finally the format.
It uses SFK duplicate deleter tool. Source included here.
The release includes a compiled sfk.exe. It's also possible to compile it from included source with the script from the author.
Thanks to:
StalhWorks Technologies for SFK.