I don’t think it is supported. Webp files aren’t allowed to be uploaded to WordPress by default but I know that can be overridden by using a plugin.
Thanks for reply – yes – i used some MIME plugin to enable WebP upload
The issue is in WP itself. It doesn´t work with WebP picture meta data, so it inserts WepP with width=”1″ height=”1″ in the posts, but especially in the thumbnails.
I have used WebP Express on many websites and this plugin was successfully able to replace JPGs and PNGs with WebPs on all the browsers which support WebP images.
I still upload JPG/PNG and the plugin itself converts them to WebP and replace the image URL.
yeah – i upload webp – display webp – but when inserting in WP i have to correct the meta data height=”1″ width=”1″