I want to show user how their website look in mobile so for this purpose I used iframe in my website to load their website by giving url but for some security reasons site not loaded there are cors policy issues. I also use curl but some files not loading due to security. Is there any API or proper way to load like in real mobile device.

<form method="get">
  <input name="website_url" type="url">
  <input type="submit">
</form>

<iframe src="<?=$_GET['website_url']?>"></iframe>