Split the folder
Put photos in one folder, screenshots in another. Run the converter twice with different quality sliders. That single habit beats any generic 'compress all' plugin.
Why it matters
- Tag and category pages stack 10 covers.
- Editors paste 2× Retina screenshots.
- Old posts are a silent PageSpeed leak.
How to do it
- Export Media Library or
staticimages. - Photos: 1400 px / 80%. Screenshots: 1400 px / 90%.
- Replace in the CMS. Keep captions and alt.
Settings that work
Content column 680–800 px CSS does not need a 2400 px file. 1400 px is plenty for retina.