HTML showing as text
solved it using below code:

$file = \Drupal\file\Entity\File::load($content-&gt;resumefid);
$filelink = file_create_url($file-&gt;getFileUri());

$url = Url::fromUri($filelink);
$external_link = \Drupal::l(t('Download Resume'), $url);

  $rows[] = array(
    'data' =&gt; array(
      \Drupal::l($id, $editUrl),
      $content-&gt;name.' '.$content-&gt;lname,$content-&gt;number,$external_link,
      \Drupal::l('Delete', $deleteUrl)
    ),