I’m in the process of moving my WordPress sites to a new server and a new version of WordPress, and as part of that I’m also reevaluating how my uploads are organized. I discovered that some of my images didn’t have thumbnails generated in the right sizes.

Fortunately, I’m not the only person who has run up against this problem.  Alex, otherwise known as Viper007Bond, wrote a handy plugin called, appropriately enough, Regenerate Thumbnails. This plugin couldn’t be much simpler. After unzipping it into a folder below your plugins folder and then activating, go to Tools > Regen. Thumbnails and click the button.

Nice. Simple. Elegant.