Free read-only checker
Free SSL Certificate Checker
An SSL certificate checker connects to a public HTTPS endpoint and inspects the certificate identity, validity period, chain evidence, and observable TLS behavior.
What does the SSL checker inspect?
The report inspects certificate validity, expiry timing, hostname context, issuer information where available, HTTPS reachability, and related public evidence. It does not access private keys or authenticated content.
Why does certificate expiry matter?
An expired certificate causes browsers and API clients to reject trust. Monitoring before expiry provides time to investigate renewal and verify every TLS termination point.
How should you use the result?
Confirm the hostname and endpoint, review the complete chain with a dedicated TLS client when necessary, and verify renewal across CDN, load balancer, proxy, and origin layers.
What happens after you submit?
The focused checker opens the full Sentryx outside-in report for the submitted domain. The same public scan backend can show related DNS, TLS, host, email-security, and header evidence so a narrow check can lead to a more complete ownership and monitoring decision.