Testing an issue we’re experiencing with images on embedded URLs being blurry. Starting with WordPress 4.4, WP became a OEmbed provider, meaning that you can just paste in the URL to a post on a WordPress site (including your own) and a preview “card” is created.
However, in our case it seems that the preview images are blurry. This is surprising because the images themselves are loaded in as 1280 pixels wide and set as the Featured Image. WordPress is doing some type of image scaling to work with the preview – and seems to be choosing too low of an image quality to work for a preview. Is there something we need to change in the WP configuration? Either in the web interface or in wp-config.php? Or is there something else we need to do.