How to disable WordPress from creating thumbnails?

Question

I've been looking around the net for a long time on how to disable WordPress from creating multiple thumbnails.

I've seen in most tutorials to set all the images to 0 in the media section. I have done that, but going to my uploads folder and it still creates multiple images.

I can't find any solution for this. The reason I want this is to save space on my host account.

Answer 1

To built on Max Yudin's answer you should use the intermediate_image_sizes_advanced filter, and not image_size_names_choose.

function add_image_insert_override($sizes){
    unset( $sizes['thumbnail']);
    unset( $sizes['medium']);
    unset( $sizes['large']);
}
add_filter('intermediate_image_sizes_advanced', 'add_image_insert_override' );

Another easier option I think works is going to your Settings-->Media and setting each box for width and height to 0

Answer 2

If I remember right you have to unset all the defaults and add the new Size there:

    <?php
function mxdCustomImageSizes($sizes) {
    unset( $sizes['thumbnail']);
    unset( $sizes['medium']);
    unset( $sizes['large']);
    unset( $sizes['full'] );

    $myimgsizes = array(
        'full-size' => __( 'Full Size' )
    );
    if( !empty($sizes) )
        return array_merge($sizes, $myimgsizes);
    else
        return $myimgsizes;
}
add_filter('image_size_names_choose', 'mxdCustomImageSizes');

And then add the full-size size which is 99999x99999 right below which size is almost unbelievable so is full size.

add_image_size( 'full-size', 99999, 99999, false );

Please correct me if something goes wrong

P. S. You'll need a plugin to "save as" all your images according to your new settings. I can recommend the Regenerate Thumbnails plugin.

P. P. S. When it's the single Option any way you'll have to choose one of one :). There no straight way to make one Size selected in the new (3.5.1) Media window.

Answer 3

You can also filter intermediate_image_sizes with an empty array.

 add_filter( 'intermediate_image_sizes', '__return_empty_array' );

Answer 4

Visit the Settings > Media page of your WordPress dashboard. Under the Image Sizes section, change all of the values to 0.

Save the changes. This will stop WordPress generating thumbnails, medium, and large sizes of every image you upload.

You will also notice that when you go to insert an image, the "Size" dropdown box is missing.