This plugin was inspired by
Medium, it makes images load better on page paint. Providing a 'blurred' version of the image at the correct scale, then fading the true image in once loaded.
It works by default on all post featured images leveraging the Wordpress post_thumbnail_html filter.
For inline images the plugin searches through your post content and refactors the image for better loading.
NOTE:
You may need to regenerate thumbnails to create the blurred image for each attachment image. We recommend using the
Regenerate Thumbnails plugin.
This plugin is designed to accommodate the image dimension ratio of the full size version. If you are using cropped images you may experience resizing issues.