By default, when you share an article on Facebook or other social networks, the first image from your content will be automatically used as preview.
If you want to force to display the Featured Image of posts as preview, you’ll need to install a 3rd party plugin or activate a feature in the Yoast SEO plugin, if you use it already.
There are 2 simply ways to fix Facebook Thumbnail:
Facebook Thumb Fixer is a free plugin, which you can install to help you display the Featured Image when you share articles on Facebook or other social networks. This is a simple plugin that will add the needed og:image property in you articles, that tells Facebook which image to use as preview. In our case it will use post’s Featured Image
If you’re using this plugin already, go to the→ menu in Dashboard, and enable the Add Open Graph meta data feature in the Facebook tab:
If you enabled a method that we explained above in order to force showing Featured Image on Facebook, and some articles still show a different image, then you’ll need to use the Facebook Debugger tool to fetch new information, by entering the URL of a specific article:
Still doesn’t work?