WebP
A web image file that can squeeze like JPEG or keep every pixel like PNG.
See it in FX engine. Save a PNG here: the pictures on these word pages are lab PNGs turned into WebP.
In plain words
WebP is an image file made for the web. It can drop detail like JPEG, or keep every pixel like PNG. Either way, files usually come out smaller than both. It can also hold see-through areas and short animations. Every modern browser can show it.