Question 1

How do I check if my SSL certificate is valid?

Accepted Answer

Enter your domain name (e.g. example.com) in the SSL checker above and click "Check SSL". The tool will connect to your server and display the certificate's validity, expiry date, issuer, and trust status within seconds.

Question 2

What does SSL certificate expiry mean?

Accepted Answer

SSL certificates are issued with a validity period (typically 1 year or 90 days for Let's Encrypt). Once expired, browsers show a security warning to your visitors and block access to your site, which harms trust and traffic.

Question 3

What are Subject Alternative Names (SANs) on an SSL certificate?

Accepted Answer

SANs (Subject Alternative Names) are the list of domain names and subdomains covered by a single SSL certificate. A wildcard certificate covering *.example.com will list all subdomains it protects in the SAN field.

Question 4

How often should I check my SSL certificate?

Accepted Answer

You should monitor your SSL certificate at least 30 days before its expiry date to have enough time to renew it. Uptime Assure can automatically monitor your SSL and alert you when renewal is due.

SSL Certificate Checker