easy way to drag & drop jpg only

is there an easy way to drag & drop only the jpg file, e.g. when quickly uploading an unprocessed jpg to an online gallery as a preview to friends or clients.

a workaround could be to rate the images, and then move or copy the selected images to another folder. but it is an otherwise unnessecary step, and can lead to confusion if further changes in ratings are made in the base directory. 
big thanks!