How to verify an SSL certificate

The SSL Certificate Checker performs a TLS handshake against a hostname and shows you what the server presented.

Steps

1. Open the SSL Certificate Checker.
2. Enter the hostname. Optionally specify a port — defaults to 443.
3. Run the check.

You'll see the certificate chain (leaf → intermediate → root), the SANs, the issuer, valid-from and valid-until dates, and any chain issues.

When this matters

• Before pointing DNS at a new host.
• When users report "your site looks broken in Safari" but works in Chrome (often a missing intermediate).
• Before a certificate expires.

This is a placeholder. Full guide coming soon.