Wordpress's most effective tutorial on preventing the generation of multi size thumbnails

WordPress will automatically generate images with multiple size rules when uploading images in the media library. When using, you can select images with different specifications. In fact, it is convenient for users to use. However, in most cases, such as publishing images in articles, you only need to keep the size. However, by default, multiple sizes will be generated, which is a waste of storage space.

Use code to prevent wordpress from automatically generating other size thumbnails

Add the following code to the topic functions.php Save the file anywhere.

 /** *Disable automatically generated picture sizes */ function shapeSpace_disable_image_sizes($sizes) { unset($sizes['thumbnail']);  unset($sizes['medium']); unset($sizes['large']);  unset($sizes['medium_large']); unset($sizes['1536x1536']); unset($sizes['2048x2048']); return $sizes; } add_action('intermediate_image_sizes_advanced','shapeSpace_disable_image_sizes'); /** *Disable zoom dimensions */ add_filter('big_image_size_threshold', '__return_false'); /** *Disable other picture sizes */ function shapeSpace_disable_other_image_sizes() { remove_image_size('post-thumbnail'); remove_image_size('another-size');  } add_action('init', 'shapeSpace_disable_other_image_sizes');

The above code can completely prohibit WordPress from generating thumbnails. The author tested it in the latest version 6.1 of WordPress. After using this code, only the original image will be retained when uploading images.