Test a TLS server

Enter a domain name or IP address to check the server's TLS configuration:

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The Transport Layer Security (TLS) is an internet protocol to protect data when transmitted. It is the "S" in HTTPS but can be used for more than just websites, like secure file transfer or by encrypted e-mail transmission. Initially it was known as SSL but was actually renamed TLS over twenty years ago.


Getting TLS right is not easy. Expired certificates, outdated SSL versions, unpatched vulnerabilities or other mishaps can be easily overlooked. The consequences are insecure data protection. At worst your secrets like passwords, credit card data or other sensitive information are not protected.


While taking the utmost care and due diligence when checking TLS servers, this website can not give any guarantee that the results are correct or complete. However, every potential vulnerability you fix is a step in the right direction. Did you know that Google rewards HTTPS websites with a higher ranking?