Still Exporter offers a quick and easy way to export still images from your Premiere Pro timeline. Just set a marker at each frame that you want to export and then Still Exporter exports them all as jpg, png, tiff or dpx images in one batch operation.
Still Exporter is very flexible in naming the files. The filenames are based on a pattern that can be customized by the user and may include the name, number or comment of the marker, for example.