FBC Image Utility compresses Media Library images and writes WebP and AVIF sidecars on your own server, using Imagick or GD. There is no cloud API. It also groups exact and similar duplicates for you to review, and files images into virtual folders without moving the files or changing their URLs.
This is a beta plugin while it is still being proven on live sites.
<picture> or a server rewriteWebP and AVIF conversion only work if your host’s PHP image library (Imagick or GD) can encode those formats. Check Tools Site Health Info Media Handling.