Şu kodları .htaccess dosyanıza eklemeyi deneyebilirsiniz:

# Apache Rewrite Rules
<IfModule mod_rewrite.c>
Options +FollowSymLinks
RewriteEngine On
RewriteBase /

# Add trailing slash to url
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !(\.[a-zA-Z0-9]{1,5}|/|#(.*))$
RewriteRule ^(.*)$ $1/ [R=301,L]

# Remove .html-extension from url
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.html -f
RewriteRule ^([^\.]+)/$ $1.html

# End of Apache Rewrite Rules
</IfModule>