There's an extension you can use to save it as a different format, but it's transcoding. https://chrome.google.com/webstore/detail/save-image-as-type/gabfmnlif

There's an extension you can use to save it as a different format, but it's transcoding. https://chrome.google.com/webstore/detail/save-image-as-type/gabfmnliflodkdafenbcpjdlppllnemd https://chrome.google.com/webstore/detail/save-image-as-type... In theory, you could probably do some combination of altering the user agent, and/or blocking .onload for webp images (which is often used to detect webp support). If you changed both, most sites would probably serve you a jpg/png version.