SSL Certificate Checker

Inspect certificate issuer, validity dates and hostname details for a website.

Enter a domain to inspect its SSL certificate.
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SSL Certificate Checker

Inspect the HTTPS certificate presented by a website and review useful certificate details. This can help diagnose certificate expiration, hostname coverage and other common SSL/TLS configuration questions.

How to check an SSL certificate

  1. Enter the website hostname or supported URL.
  2. Start the SSL check.
  3. Review the certificate information returned by the server.
  4. Pay attention to validity dates, covered hostnames and any warnings reported by the tool.

Why SSL certificates matter

HTTPS uses TLS certificates as part of establishing an encrypted connection and authenticating the server name. An expired certificate, incorrect hostname or incomplete configuration can cause browser warnings and prevent visitors from connecting normally.

When should you run a check?

Check after installing or renewing a certificate, changing hosting, modifying a domain configuration or investigating an HTTPS warning. Certificate information can change after deployment, so a fresh lookup is more useful than an old report.

FAQ

What does certificate expiry mean?

TLS certificates have a defined validity period and need to be renewed or replaced before they expire.

Can a valid certificate fix every HTTPS problem?

No. Server configuration, certificate chains, DNS and hostname settings can also affect HTTPS connections.