Corey Salzano

<p>This plugin does one thing, and that thing is to add your posts’ featured image to the RSS feed. It specifies the ‘large’ image size.</p>
<h3>Open Graph Meta Tags are also Necessary</h3>
<p>Many modern feed readers do not show the images added by this plugin. Feedly, for example, will not show images added by this plugin. Feed readers crawl article pages to find the image attached to posts in the open graph meta tag. Many SEO plugins add open graph tags for featured images. I like the (https://wordpress.org/plugins/opengraph/)[Open Graph] plugin, too.</p>


Add Featured Image to RSS Feed

Adds the featured image attached to posts to the beginning of the post content and excerpt in RSS feeds.

James

<p>This plugin only does one task, adding your posts’ featured image to the RSS feed in  tag. It will show your full size featured image url in the tag.</p>


JMS Rss Feed

Add the featured image tag  in your posts RSS feed. For standard RSS feed XML, there is no image tag definition. This plugin will show the post featur …

Add Featured Image to RSS Feed vs JMS Rss Feed