Bulk Certificate Expiry Check

Paste up to 20 websites and mail servers and get every TLS certificate's expiry date in one table, soonest first, with name and chain problems.

Paste the sites and mail servers you look after, one per line, and see every certificate's expiry date in one table, soonest first, with the problems browsers would complain about: the wrong name, an untrusted or incomplete chain. Up to 20 hosts at a time; add a port for anything that isn't HTTPS (mail.example.com:993, smtp.example.com:587 with STARTTLS). Each host gets one TLS handshake from tclient.com's server; for a single host in depth, with TLS versions and revocation, use the TLS Certificate Checker.