https://certlogik.com/ssl-checker
https://www.ssllabs.com/ssltest
https://www.wormly.com/test_ssl
https://www.digicert.com/help
https://www.immuniweb.com/ssl
https://www.sslshopper.com/ssl-checker.html
https://tls.imirhil.fr
https://aboutssl.org/ssl-tools/ssl-checker.php
https://www.thesslstore.com/ssltools/ssl-checker.php