Disabling wp_tag_cloud() outputting inline CSS

Question

The only way to do this is to return the tag cloud as an array since every other tag parameter will still add inline font-sizing.

To return the cloud as an array you can use <?php $tag = wp_tag_cloud('format=array' );?>

or in a functions.php filter,

//tag cloud custom
add_filter('widget_tag_cloud_args','style_tags');
function style_tags($args) {
  $tag = wp_tag_cloud('format=array' );

 //var_dump to test output, as you can see you can style this any way you want 
 var_dump ($tag);
}