Images saved from websites are often WebP, which some apps and forms still don't accept. Convert them to JPG here.
WebP is a modern format websites use because it's small. But when you save an image from a site, older software, some print services and many upload forms won't accept it.
This page converts WebP to JPG at high quality and keeps the original dimensions. Transparent areas become white.
Many websites serve WebP to save bandwidth. Your browser saves the file in the format the site sent.
Usually a bit bigger at the same quality. That's the trade-off for opening everywhere.
Only the first frame is kept, as a still JPG.