SSL Certificate Checker
Verify SSL/TLS certificates for any website. Check certificate validity, expiration dates, issuer information, and security configurations to ensure secure connections.
Enter a domain name to check its SSL/TLS certificate
What We Check
Certificate validity and expiration
Certificate chain and issuer
Key strength and algorithm
Subject Alternative Names (SAN)
Why Check SSL Certificates?
SSL certificates encrypt data between browsers and servers. An expired or misconfigured certificate can expose users to security risks and cause browser warnings that damage trust.
Frequently Asked Questions
What does an SSL certificate do?
SSL certificates encrypt data transmitted between a website and its visitors, verify the website's identity, and establish trust with users.
How often should I check my SSL certificate?
Check monthly to ensure certificates don't expire unexpectedly. Set up monitoring to receive alerts before expiration.
What happens if a certificate expires?
Browsers will show security warnings to visitors, potentially blocking access and damaging your site's reputation and SEO.
What is certificate chain validation?
Certificate chains link your certificate to a trusted root certificate authority. All certificates in the chain must be valid for secure connections.