This tool reads your AVIF image directly in the browser and encodes a JPG copy, so there is no upload, no queue and no waiting for a server. It works on desktop and mobile.
AVIF produces very small files, but many editors, email programs and social apps cannot open it yet. Converting to JPG gives you a copy that works everywhere.
AVIF files from the web may be larger as JPG at the same quality, since AVIF is a more efficient format.