The application converts jpg and png images via the Finder of macOS into the formats webp or avif. The conversion is accessed by right-clicking on one or more marked image files. Quick actions can then be used to create the marked files in webp format, for example.
In this post I describe how to declare images of the page bundle in the front matter of the Markdown file. Since the Markdown possibilities of the image output are not sufficient for me, I have programmed two shortcodes with more possibilities ( size, positioning, caption).