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:

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

Replace yourdomain.com with your actual domain name.