(Iphone, photos) I have alot of Live photos from a wedding how do i make them all still images?

My friend asked me to take some photos at his wedding… Well I did and took around 900 photos, but sadly they were all Live photos. Every time I try to move them to a CD or SD card they show up as videos. Is there a way I can make them all still images without to go to each individual photo and fixing it?

(Iphone 8plus)

Live photo to JPG converter

Indeed they seem not to be photos at all, but video clips, thus not "photos" in any sense of that word.