There is some third party software to resize images, though it is outside WP, but if you do it once, it may then save some processor power and traffic later. One of them was FSresizer
its desktop icon looks like this:
https://bizpages.org/userimages/53ced01828
It can do a bulk resizing, conversion between formats and many other useful things.
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This reply was modified 4 years, 7 months ago by Ed.
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This reply was modified 4 years, 7 months ago by Ed.