Facebook Image Thumbnail
When you share a post or page from your site on Facebook using the share button or Publicize feature, you’ll see that Facebook selects a thumbnail image from your page to display with your link. We recommend to Facebook which images we think should be displayed.
Your Blavatar is always used when sharing your blog’s main page on Facebook.
Posts and Pages
The image Facebook selects for other posts and pages depends on where and how you have uploaded images to your blog, as follows:
Featured image: if a featured image has been uploaded for a post/page, we will recommend to Facebook that this image be used as a first priority.
Uploaded images: If you haven’t assigned a Featured Image, we recommend images to Facebook that you have inserted into your post. They are recommended from top to bottom in your post.
No Images: If no images are used in your post, we will recommend a transparent image. Facebook will also look at the content posted elsewhere on the page for images that will work, such as widgets, the header, and others.
Image Thumbnail Problems / FAQ
Don’t see an image at all?
This is usually due to the featured image or uploaded image not meeting Facebook’s size requirements, which are:
- At least 200×200 pixels in both width and height
- Aspect ratio of width and height no greater than 3; in other words, the width can’t be more than three times more than the height, and vice versa. An image such as the garden image below is too disproportionate for Facebook to use (300 pixels wide by 90 pixels high).
Changed an image, but Facebook doesn’t see it?
Once a post or page has been shared on Facebook, the images have been stored in a cache on their server for future shares. Facebook doesn’t look at the page again for new images until their cache expires. This time period is unpredictable, but can be days or weeks. You can force Facebook to update its cache for your post/page by entering the link to the specific blog post you’re sharing into their Debug tool on this page:
After pasting your link into the box on that page, click the “Debug” button. Then, click the “Scrape Again” button that appears beneath the Warnings section.
You may need to click the “Scrape Again” button twice. Once the debug tool shows the updated images and information on your post or page, try sharing it on Facebook again.
A wrong image is used, what do I do?
Even though we make a best effort to tell Facebook what images are associated with a post, their systems also analyze the page/post and choose what they think is the best representation. By following the guidelines about image size and aspect ratio outlined in this document, chances are better that the image that you would like to be associated with your blog post’s share is the one that Facebook selects.