HTTPS is a combination of the HTTP with SSL/TLS protocol to provide encrypted communication and secure identification of a network web server. HTTPS connections are often used for payment transactions, social network websites and for sensitive transactions in corporate information systems. For testing you need just to submit the domain and service will display all servers related to this domain with a complete report on overall SSL Security. This is the result for Facebook while you can test your server to find out if there is a security problem with your HTTPS security service.
Source: https://thehackernews.com/2011/08/automated-https-vulnerability-testing.html