Here's a test of webp image format, if your browser supports it natively you'll see the same image twice, the second one being .webp.
It's also a lot smaller in file size (3.1 MB original, 1.2 MB webp) and no real quality loss. It did lose a bit of the "grain" effect from the original but that can be fixed by increasing the quality when saving, still giving a smaller file size than the jpg.
jpg:
[Image: https://osayidan.net/files/webp_demo.jpg]
webp:
[Image: https://osayidan.net/files/webp_demo.webp]
how do you host your own images ??