SSL Check
Check the SSL/TLS certificate of a website – validity, issuer and encryption.
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How the SSL Check Works
Our SSL check connects to the web server of the entered domain and reads the SSL/TLS certificate. You receive information about the certificate issuer (CA), issue and expiry date, supported TLS versions and possible security issues such as expired certificates or weak encryption.
Frequently Asked Questions about SSL Check
What is an SSL certificate?
An SSL/TLS certificate encrypts the connection between your browser and a website. It ensures that data such as passwords, credit card numbers or personal information cannot be intercepted by third parties. You can identify SSL-secured websites by the padlock symbol and "https://" in the address bar.
What happens when an SSL certificate expires?
Browsers display a warning page and block access by default. Visitors lose trust, and search engines may downgrade the website in rankings. Expired certificates should therefore be renewed promptly.
Does every website need an SSL certificate?
Yes. Since 2018, all major browsers mark websites without HTTPS as "Not Secure". Google prefers HTTPS websites in rankings. Free certificates are available via Let's Encrypt, so there is no longer any reason to skip SSL.