How to redirect www URLs to non-www?

To redirect all requests to non-www, add the following lines at the beginning of your website’s .htaccess file:

RewriteEngine On
RewriteCond %{HTTP_HOST} ^www.yourdomain.com [NC]
RewriteRule ^(.*)$ http://yourdomain.com/$1 [L,R=301]

Replace yourdomain.com with your actual domain name.