Dupe Clear is an Open Source duplicate file cleaner.
It can perform a duplicate file search in any folder, and it includes search filters to narrow down the search scope, like by extension, modification date, etc. Using these filters can help to perform your search quickly. You can then select the files you want to delete through a range of selectable criteria.
Dupe Clear is presented from a simple utilitarian interface that lends itself to performing your search expeditiously without overly complicated features and configurations.