Certificate Checker
API
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Help
Single Check
Hostname or IP *
Port
SNI Hostname (optional)
Server Name Indication - use when connecting to IP but need a specific virtual host
Check CN/SAN match (optional)
Verify the certificate's Common Name or Subject Alternative Names include this hostname
Check Certificate
Batch Check
Enter one check per line:
host:port[:sni[:validate]]
Batch Input
Check Batch