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Resrict valid formats in WYSIWYG editor

  • Hi all,

    Is there any option to restrict the format (HTML codes) that is saved within the visual editor in ACF?

    I already restricted the Toolbar to a very limited set of formatting options. However, any kind of annoying formats can be accidentally introduced by copy-pasting formatted text from some where else.
    The original TinyMCE has the option extended_valid_elements, that can define valid HTML markup.

    Is it possible to define such an option in AFC as well?

  • Dear all,

    After sleeping some nights over this issue, I looked again at the acf JS code and suddenly found the wysiwyg_tinymce_settings filter. This helped me to modify the input fo the tinymce.init() call. My solution is:

    function my_acf_input_admin_footer() {
        <script type="text/javascript">
            acf.add_filter('wysiwyg_tinymce_settings', function( mceInit, id, $field ){
                mceInit.valid_elements = 'p,strong,em,del,span[style="text-decoration: underline;"]';
                return mceInit;
    add_action('acf/input/admin_footer', 'my_acf_input_admin_footer');

    This restricts the editor to only use b, i, del and underlining.

    Now I’m happy again 🙂

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