What is WebP image format? WebP is an image format created by Google. Its algorithm is able to compress images to be significantly smaller than WebP and PNG. It also supports transparency. Which browsers support WebP? WebP is currently supported on most browsers. Visit Can I Use WebP to see the latest WebP compatability by Can I Use. How do you make WebP images? Unlike classic formats like jpeg or png, you cannot simply save to WebP format on most image editors.