SSL (Secure Sockets Layer) is the legacy name for encrypting traffic between browsers and servers. Modern sites use TLS, but people still say SSL certificate.

Transport Layer Security (TLS) is the protocol behind HTTPS. This ssl checker connects with TLS and reports the negotiated version.

How do I renew a certificate?

Order a new cert from your CA or use ACME (Let's Encrypt), install it on the server, and reload the web service before the old one expires.

Does HTTPS improve SEO?

Google treats HTTPS as a lightweight ranking signal and users trust secure sites more — expired certs hurt both.

What happens when a certificate expires?

Browsers show warnings and may block the site until a valid certificate is installed.

What is a certificate chain?

A chain links your domain cert to intermediate and root CAs so browsers can verify trust. Missing intermediates cause errors.

Security Tools

SSL Certificate Checker

Check SSL certificate validity, expiration date, issuer, HTTPS configuration, certificate chain, and security status for any website.

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