Security & HTTPS
How to Check if an SSL Certificate Is Valid
Use browser information and an SSL certificate checker to verify hostname coverage, issuer, trust chain and expiration.
A certificate stored in a hosting panel is not necessarily the certificate your public website is serving. The best check is to inspect the live hostname after installation, renewal or migration.
Check the HTTPS hostname in a browser
Open the exact hostname visitors use and inspect the connection information. Confirm that the browser does not show a certificate warning.
Use an SSL certificate checker
A checker can display the subject names, issuer, validity period and chain presented by the server. This helps identify expired certificates, hostname mismatches and incomplete intermediate chains.
Check after every infrastructure change
Load balancers, CDNs, reverse proxies and origin servers can each serve certificates. After a deployment or migration, verify the public endpoint instead of assuming that an internal configuration change propagated correctly.
How to Check if an SSL Certificate Is Valid — FAQs
What makes an SSL certificate invalid?
Common causes include expiration, hostname mismatch, an untrusted issuer, an incomplete chain or a server presenting the wrong certificate.
Should I check the certificate after renewal?
Yes. Verify the live hostname after renewal to confirm that the new certificate is actually deployed.
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