How do I check an SSL certificate?

Enter the hostname above and run the checker. You will see issuer, subject, SANs, dates, and fingerprints from the live certificate.

How do I know if an SSL certificate is valid?

Confirm the current date falls between valid-from and valid-to, the hostname appears on the CN or SAN list, and the chain is trusted. This tool reports those fields and a trust note from the server runtime.

When does an SSL certificate expire?

Every certificate carries a not-after date. Use this page or our SSL Expiry Checker to see days remaining.

What does an SSL certificate contain?

Typical fields include subject, issuer, serial number, validity window, public key, and subject alternative names that list covered hostnames.

How do I troubleshoot SSL certificate errors?

Match the browser error to the cause: expiry, name mismatch, incomplete chain, or untrusted issuer. Inspect the live cert here, then fix issuance or deployment.

What is SSL Certificate Checker?

A free online tool that inspects the HTTPS certificate presented by a public hostname.

How does the SSL Certificate Checker work?

Our server completes a TLS handshake to the host, reads the peer certificate, and returns structured fields for you to review.

How do I use the SSL Certificate Checker?

Type a hostname, tap Check certificate, and review the result grid. Example chips load well-known public sites.

Is this SSL Certificate Checker free to use?

Yes. It is free with no sign-up.

Can I use the SSL Certificate Checker on mobile?

Yes. Mobile browsers are supported.

Free SSL Certificate Checker Online, Inspect HTTPS Certs

Free SSL Certificate Checker Online, Inspect HTTPS Certs | Binary Tech