Be sure to make a backup! This can delete things! Also, if any of your images are external images, it can not delete the images on your hard drive.
Paste this into a tiddler and save. Delete the images you don't want.
```
<table>
<$list filter="[all[tiddlers]]:filter[get[type]prefix[image]]">
<tr><td><$transclude mode=inline/></td></tr>
<tr><td vertical-align="middle" height="40px"><$button>Delete the image <<currentTiddler>> ?
<$action-deletetiddler $tiddler=<<currentTiddler>> />
</$button>
</td></tr>
</$list>
</table>
```