So I was just reviewing a client site and noticed there was a 2mb image being loaded on the page. I looked into things, the code is pulling the “large” image size which is 1200 x 1200 in media settings. However it’s pulling in the original full image which is crazy at 10332×6888 pixels and 2mb.
I installed regenerate thumbnails plugin thinking maybe it was a fluke with this image. It showed no image sizes generated. All had the red X. So I clicked regenerate thumbnails. Said it was done, checked again, nope, all red X’s it didn’t generate any of the images.
I’ve never seen/noticed this before on any site. Is this some sort of server memory limit or something possibly? Anyway around this without having them swap the image for a properly sized one? They even have Smush PRO installed, but since it’s not generating any of the sizes, it’s still pulling in the original one.
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WP uses various images sizes, one of which is “full”, which is the untouched file that was uploaded. That would be the image size that your theme is used for that image. Often you can specify the image size, which is where you’d specify large, etc.
I’m guessing the thumbnails are actually on your server (check via a file manager/SFTP client) – it’s just that your theme isn’t using for the specific location on your page eg the banner/hero will often be the ‘full’ image size.
Thumbnail generators generally only generate thumbnails if the files don’t exist. That isn’t the problem your experiencing.