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SSL Certificate Checker
Inspect the live certificate served by a public website and spot common certificate problems.
Check a website's SSL certificate
Checks the certificate presented on HTTPS port 443. Enter a public hostname only.
What this checker verifies
Live certificate check: This tool attempts a TLS handshake from the DevOpsKing hosting server and reads the certificate the target presents. It validates the certificate chain and hostname using the PHP/OpenSSL trust store, then reports issuer, validity dates, SAN names, serial number, signature algorithm, and SHA-256 fingerprint. It is a quick certificate diagnostic, not a full TLS configuration audit like SSL Labs. It does not currently inspect every intermediate certificate separately, test all TLS versions/ciphers, or check certificate revocation.