Add HTML to Feature Image Metabox

Snippets by IsItWP

Are you looking for a way to add HTML or content to the featured image metabox? We have created a quick code snippet that you can use to add HTML to featured image metabox in WordPress to add more information for your users.


All you have to do is add this code to your theme’s functions.php file or in a site-specific plugin:

add_filter( 'admin_post_thumbnail_html', 'add_featured_image_html');
function add_featured_image_html( $html ) {
    return $html .= '<p>This is some sample text that can be displayed within the feature image box.</p>';

Note: If this is your first time adding code snippets in WordPress, then please refer to our guide on how to properly copy / paste code snippets in WordPress, so you don’t accidentally break your site.

If you liked this code snippet, please consider checking out our other articles on the site like: 9 best WordPress accordion plugins and how to create stunning WordPress optin forms.

Comments   Leave a Reply

  1. hi. do you know how to set this for individual custom post types?

    1. You could use something like this:

      if(‘custom_post_type’ == get_post_type()) {

      return $html .= ‘Description’;


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