RewriteEngine On
# Jika folder web kamu di XAMPP ada di dalam folder tertentu, hapus tanda # di bawah dan sesuaikan:
# RewriteBase /nama-folder-kamu/

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]+)/?$ index.php?page=$1 [L,QSA]