Pegar o favicon de um site de forma dinâmica: https://www.google.com/s2/favicons?domain=slack.com https://www.google.com/s2/favicons?domain=facebook.com
https://t1.gstatic.com/faviconV2?client=SOCIAL&type=FAVICON&fallback_opts=TYPE,SIZE,URL&url=https://slack.com&size=16 https://t1.gstatic.com/faviconV2?client=SOCIAL&type=FAVICON&fallback_opts=TYPE,SIZE,URL&url=https://slack.com&size=32
http://i0.wp.com/www.URL/OF/YOUR-IMAGE-image.png?fit=SIZE_W%2CSIZE_H&ssl=0
https://i0.wp.com/www.URL/OF/YOUR-IMAGE-image.png?fit=SIZE_W%2CSIZE_H&ssl=1
Example
http://i0.wp.com/www.php.net/images/meta-image.png?fit=256%2C256&ssl=0
https://i0.wp.com/www.cssscript.com/wp-content/uploads/2016/10/cropped-web-code.png?fit=256%2C256&ssl=1
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