About WebP to JPG conversion
Some older apps, email clients and print services still don't accept WebP. Converting to JPG makes the image open everywhere.
Transparent areas in the WebP are filled with your chosen background colour, since JPG has no transparency.
Animated WebP files are converted from their first frame. Vimorby flags them when you add them.
Private by design
Everything happens inside your browser tab. Your image is never uploaded, so it is never stored on a server.