SSL CheckerMonitorReady
We connect to the site, read its SSL certificate and chain, and look up when the domain expires, so you see who issued the certificate, which names it covers and how many days are left.
We connect on port 443 and ask the registry when the domain expires. No account needed. 6 of 6 checks left today.
How to use it
Four steps from an address to results you can act on.
A secure connection is opened to the site.
Issuer, dates, names and the full chain.
The registry's expiry date for the domain.
Days left and anything that would break the padlock.
What it brings you
Every result comes with the proof behind it, so you can check it yourself.
Days until the certificate and the domain expire.
Whether the certificate covers this host and www.
Missing intermediate certificates.
Old TLS versions still accepted.
Whether HTTP sends visitors to HTTPS.
What the result looks like
Results are sorted so the most important rows come first. This example uses sample data to show the layout.
| Check | Found | Status |
|---|---|---|
| Certificate | Expires in 54 days | Valid |
| Covers www | Yes | Passed |
| Chain | Complete | Passed |
| Domain | Expires in 19 days | Warning |
Questions
An expired domain takes the whole site and its email down, even with a valid certificate.
No. We read what every visitor's browser sees.
Most certificates renew on their own. Check that renewal works at least two weeks before expiry.