Free tool

Is your SSL certificate in order?

Enter a host name. We open a TLS connection from outside and show everything about the certificate the server delivers.

Free, no sign-up
No tracking, no ads
Checked from outside

What is checked

A monitoring location connects to the server and checks the certificate like a browser against the usual root certificates: if it has expired, does not match the name or an intermediate certificate is missing, we show the reason. Plus issuer, validity, alternative names (SAN), key type, TLS version and the chain the server sends.

The most common error after a renewal is an incomplete chain: the browser on your own computer still knows the intermediate certificate and shows nothing, other devices refuse the connection.

FAQ

Does it work for other ports, e.g. mail?

Yes, for all services with direct TLS, such as 443, 993 (IMAPS), 465 (SMTPS) or 8443. The tool does not check STARTTLS (ports 25, 587, 143).

Will you remind me before expiry?

The Statusbot can: an SSL monitor alerts you in good time before a certificate expires.

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No more expired certificates

The Statusbot monitors certificates and alerts you before they expire: the small one is free.

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