With Simple Photo Converter you can choose one or more photos and convert them to other image formats. Massive rename, where you can choose a name and automatically add an increasing number to each Photo.
Professional photography for real estate usually costs $150-$200, though prices may vary based on where you live. If you’re working with a listing agent, it’s likely that professional photography for real estate will be covered by your agent as part of the services they offer for their commission.
A wide-angle lens takes better real estate photos because you can include more of the space in one image, but only some newer iPhones come with this feature. External lens sets, while expensive, can augment built-in lenses nicely.
PixConverter is another free image converter. Though it has plenty of useful features, it still manages to be easy to use. The program supports batch conversions, the ability to import multiple photos from a folder at once, image rotation, resizing, and altering the image color.