# Protect admin panel (optional, works on Apache)
<FilesMatch "^admin">
    Order allow,deny
    Allow from all
</FilesMatch>

# Enable rewrite engine
RewriteEngine On

# Remove .html extension
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.html -f
RewriteRule ^(.*)$ $1.html [NC,L]