Note from 30 April 2022

When you start using an image CDN on a site with oversized JPEGs, without any change to the HTML:

SpeedCurve test showing a 20 seconds gain in Largest Contentful Paint

Imagine when there will be accurate srcset/sizes attributes, better formats, etc. 🤯


  1. screenshot of The Case for JPEG XL

    Jon Sneyers avatar Jon Sneyers

    The Case for JPEG XL

    Jon gives a good overview of everything JPEG XL improves over other image formats. This article can be seen by some as biaised, as Jon is part of the team that created the format, but I really think it honestly shows clear advantages, and I hope it will help people understand JPEG XL support in browsers would be great.