SSL Checker
Check a website’s SSL/TLS certificate - validity, issuer and expiry date.
SSL Checker
Enter a domain to check its SSL/TLS certificate - validity, issuer, expiry date and more.
About SSL Checker
The SSL Checker inspects a website’s SSL/TLS certificate and reports whether it is valid, who issued it, when it expires, the TLS protocol version and the alternative names it covers.
How to use SSL Checker
- Enter a domain name.
- Press “Check certificate”.
- Review validity, issuer, expiry date and the alternative names.
Frequently asked questions
What does an SSL certificate do?
An SSL/TLS certificate encrypts the connection between a browser and a website and proves the site’s identity, which is what enables HTTPS and the padlock icon.
What happens when a certificate expires?
An expired certificate causes browsers to show a security warning and block the site until it is renewed, so it is important to check the expiry date ahead of time.
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