Quote Originally Posted by Cloud View Post
I'm surprised that this isn't supported - BUT, this can and is implemented on the server-side. For example, siteground have this built-in, they serve WebP versions of your images to compatible browsers, the jpeg version is still there if needed. I'm sure there are plenty of other hosting company's which offer this.

Edit - I think that may be only applicable to WordPress sites. Plus Google only cares about the speed, not the format used.
Interesting, my site is hosted with siteground, I am not aware of the ability to use webp images, will have to look into that, although I suspect I would need to configure the site some how to use the webp images, and not just upload webp copys.