New Plugin: Regenerate Thumbnails Posted on August 30th, 2008 by Alex Mills A client needed a way to regenerate all thumbnails for their uploads, so I threw together a plugin to do that in just one click and a helpful interface. The main plugin interface. Regenerating in progress. Interface for regenerating a single attachment. Individual images can be regenerated from the media library in list view. They can also be regenerated from the edit attachment screen.