SSL Certificate Checker

An SSL (Secure Sockets Layer) certificate encrypts data between visitors and your website. It ensures that sensitive information like passwords, credit card numbers, and personal data cannot be intercepted by attackers. Websites with SSL certificates show a padlock icon in the browser address bar and use HTTPS instead of HTTP. Modern SSL certificates actually use TLS (Transport Layer Security), the successor to SSL, but the term "SSL" remains widely used.

Monthly checks are recommended. Certificates typically expire every 90 days (Let's Encrypt) or yearly (paid certificates). Regular monitoring helps you catch expiration issues, misconfigured certificate chains, or protocol downgrades before they cause downtime or security warnings for your visitors. For mission-critical sites, automated monitoring with tools like GuardPress Pro is the safest approach.

A (90-100): Excellent configuration. Your SSL setup follows best practices with strong encryption, valid certificate chain, and modern TLS protocol.

B (75-89): Good configuration with minor improvements possible, such as upgrading TLS version or renewing soon.

C (60-74): Needs improvement. Some security concerns that should be addressed, like an approaching expiration date.

D (40-59): Poor configuration with significant issues that put visitors at risk.

F (0-39): Critical issues that need immediate attention, such as an expired certificate or broken chain of trust.

Yes, this SSL certificate checker is completely free to use with no registration required. You can check any public domain's SSL certificate as many times as you need. The tool connects directly to the server over TLS and analyzes the certificate in real time, providing you with an accurate security assessment.