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How I can fix problem with ACF WP Redactor?

  • Hello everyone! I’m using acf wordpress redactor and in the redactor I can add Media File, but the tag has default options.


    How I can remove this options (width, height, classs)

  • Hi @avearthasz

    You would need to add a function to the theme’s function file, something like:

    add_filter( 'post_thumbnail_html', 'remove_media_attributes', 10 );
    add_filter( 'image_send_to_editor', 'remove_media_attributes', 10 );
    function remove_media_attributes( $html ) {
       $html = preg_replace( '/(width|height|class)="\d*"\s/', "", $html );
       return $html;

    Code untested!

  • Thank you! It’s working 🙂 But.. Do you know how to disable this?


    ACF resizes my image anyway. My image has 1200×600, but the plugin resized to 300×169.

  • That looks more like when you select to add an image, you’re not selecting full size but the medium size (which is the default).

    Remove the image, re-add it but look to the bottom right corner near the select button and change the image size in the drop down

  • Yes) Thank you very much!

  • Sorry, Jarvis. But do you know how to remove default class to my custom? (img)

    Example: Default class are “alignnone wp-image”
    My class is “news__img”

  • You can use add_filter( 'get_image_tag_class', '__return_empty_string' );
    To remove all classes

    You can also use

    function add_custom_image_class($class){
    	$class .= ' news__img';
    	return $class;

    To add new classes. This only works when adding images after the code is in place not to existing images.

    Alternatively, you could look to use jQuery and do a find/replace on the class

  • Perfect! Thank you Jarvis

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