Post featured image should appear as a thumbnail preview when shared.

Hello, I’m sorry to hear that you’re facing issues with the featured images not appearing as thumbnail previews when sharing your posts. Here are some steps you can take to troubleshoot and fix this issue:

1. Check if the Featured Image is Set: Ensure that you have set a featured image for the posts where the thumbnail is not appearing. You can do this by navigating to the post editor and checking the featured image section.

2. Set Default Open Graph Image: You can set a default Open Graph image in Rank Math. Go to WordPress Dashboard → Rank Math → Titles & Meta → Global → OpenGraph Thumbnail. Click on Add or Upload File to set your image, then click Save Changes.
   

3. Check Individual Post Settings: For each post, ensure that you have configured the Open Graph settings correctly. In the post editor, look for the Rank Math Meta Box and check the Social tab to see if the correct image is set for Facebook and Twitter sharing.
   

4. Image Dimensions & Format: Make sure that the images you are using meet the recommended dimensions of 1200px X 630px and are in a supported format (JPEG, PNG, GIF, WebP). If the dimensions are too small or too large, social networks may not display them correctly.

5. Clear Cache: If you are using any caching plugins, clear your cache after making changes to ensure that the latest settings are applied.

6. Use Facebook Debugger: You can use the Facebook Sharing Debugger to scrape your URL again. This tool can help identify any issues with how Facebook sees your page and can refresh its cache for your URL.

If you’ve gone through these steps and are still experiencing issues, please reply to this ticket with your site URL so that a human agent from our support team can assist you further. Thank you for raising this concern!

Sources:
Open Graph/Social Preview Image Is Not Displayed » Rank Math
Open Graph/Social Preview Image Is Not Displayed » Rank Math