An Expired SSL Certificate Can Take Your Site Down
The moment an SSL certificate expires, browsers immediately show a "connection not secure" warning, and most visitors leave on the spot. For any service that handles logins or payments, that's a direct hit to revenue and trust. Renewing a certificate isn't hard — but forgetting to is a fast track to a real problem.
This tool takes your certificate's expiry date and calculates the days remaining from today, along with a recommended renewal date set 30 days earlier to account for DNS propagation and server deployment time. It also flags a status — Safe, Renew Soon, Urgent, or Expired — so you can gauge risk at a glance.
If you manage multiple domains, keep a list of expiry dates and check them here periodically. Many certificate authorities, like Let's Encrypt, now support automatic renewal — worth considering if manual tracking feels like too much overhead.
Frequently Asked Questions
Once a certificate expires, browsers show a security warning and can block access entirely, so preparing the renewal ahead of the actual expiry date prevents any service disruption.
Accounting for DNS propagation, CA validation, and server deployment and testing time, the industry standard is to start the renewal process at least 30 days before expiry.
Click the lock icon in your browser to view certificate details, or check it via the openssl command line or your certificate authority's management console.