Webp upload disable

Review these plugins:
https://www.ads-software.com/plugins/disable-webp-by-default/
https://www.ads-software.com/plugins/disable-webp/

Alternate, try adding in the functions.php of a child theme the following:
add_filter( 'wp_upload_image_mime_transforms', '__return_empty_array' );

Hi @aivanov12, if you don’t want to install a third-party plugin you can use this little snippet to create your own plugin and block those image types, and more if you desire, just add them to the $key_extensions array.

function excluded_mimes($mimes) { 
    $key_extensions = array('png', 'webp');
    foreach ($key_extensions as $ext) {
        unset( $mimes[$ext] );
    }
    return $mimes;
}

add_filter('upload_mimes', 'excluded_mimes');`

• This reply was modified 2 years ago by Krystle Salazar.

Side note to @krysal ,

if you don’t want to install a third-party plugin

FYI: these plugins are NOT “third-party plugin”. These plugins are available here in the https://www.ads-software.com/plugins/

Thanks for the correction @t-p! Admittedly I didn’t look at the URLs. So @aivanov12, as @t-p suggest, probably the easier solution is to use the plugin.

Unfortunately none of the above codes work for me. Thank you. I add in functions.php but no result.

Have you tried any of the plugins?

No, but I’ll try. And most likely this will be the solution. Thank you very much.