Images on the web are a big problem, especially on mobile devices. To reduce the waiting time, placeholders are often used. In order to make them more interesting and better match the actual content, low resolution images are increasingly loaded. But even these are a few kb in size.
With BlurHash a hash is generated from the image, with which a blury image can be created on dme device. In comparison to a small image only a few bytes are needed.
More infos and a demo on https://blurha.sh/