The image below is in a sandboxed iframe using srcdoc, which allows us to resize the image to fit. Sandboxed iframe should prevent cookies from being read or set.
How This Works
// we need at least an image URL to start // if pinmarklet has already scraped this image from the page we know its height and width // otherwise we will arbitrarily make a 236x236 iframe and show the image resized to 236px wide by whatever tall const data = { src: "https://img.webmd.com/dtmcms/live/webmd/consumer_assets/site_images/article_thumbnails/other/dog_cool_summer_slideshow/1800x1200_dog_cool_summer_other.jpg", height: 1200, width: 1800 } // width of our iframe const targetWidth = 236; // start the tag const fr = document.createElement('IFRAME'); // sandbox to block cookies fr.sandbox = ''; fr.style.height = targetWidth + "px"; // if we know dimensions we can style height to contain the full image if (data.height && data.width) { fr.style.height = data.height * targetWidth / data.width + "px"; } // slam the entire HTML source object in via srcdoc fr.srcdoc = `<html><head><style>body{background:transparent;overflow:hidden;padding:0;margin:0;}<body><img src="${data.src}" width="${targetWidth}" /></body></html>`; // add to page document.body.appendChild(fr);