What do image formats like WebP and AVIF provide?

Modern image formats deliver significantly smaller files at the same visible quality than the classic JPEG and PNG formats. WebP typically saves 25 to 35 percent over JPEG (Google, 2023), and AVIF achieves savings of 40 to 50 percent. Since images make up by far the largest share of transferred data on most websites, this is one of the most effective single steps towards a better LCP.

The key is clean implementation: we set up automated image pipelines that generate every uploaded image in the appropriate formats and in several responsive sizes, delivered via srcset. Older browsers automatically receive a compatible fallback. This way every device loads exactly the variant it needs, without oversized files. More on this on the frontend optimization page.