[xuki]

It's not the format but the image size. For example:

https://l3ouu4n9.github.io/2021/note/BHUSA/1.png - 37 megapixel - 50MB.

[codetrotter]

The irony of it is that the image isn't all that sharp either. There are many pixels, but not enough detail in the actual image to warrant that many pixels IMO.

This image could have been scaled down from it's current dimensions of 9894x3786 down to say 1920x210, and it would still probably contain basically the same amount of information really.

[capableweb]

Since the website sets the images to have a max width of 720 pixels, it should really just be that instead too :)

[stjohnswarts]

...even as a jpg :)