API generated images bigger than original?

[eutervogel]

Hi,
I'm just wondering how this file sizes can occur. They are all 1920x1200.
It's not a very big deal to me, but I can't wrap my head around what's happening here.

[howdytom]

Using PNG compression for pictures might generate large files. Even with your black gradient try to export the original image as JPEG instead. The file size should be considerable smaller for all variations including webP files.

[BrendonKoz]

If calling the size() method on any page image fields, the default value for upscaling within that method is true. That means if there's code in a template to resize, unless upscaling is passed in as an option with a value of false, a 200x120 sized image could theoretically be resized to 1920x1200. (Just a possible way this could happen.)