Guide
How to check when an SSL certificate expires
A practical checklist for checking a certificate before visitors see a browser warning.
Start with the essential
An expired SSL certificate can make a working website look unsafe. Visitors may see a browser warning before they can reach a page, which can interrupt sign-ups, purchases, and support requests. Checking the expiry date before renewal day is the simplest protection.
Put it into practice
Start with the domain name only, without a page path. Confirm that the certificate is issued for the domain visitors actually use, including the www version if it is served separately. Also check the issuer and the validity dates rather than relying only on the padlock icon.
A detail worth checking
Set more than one reminder: one about 30 days before expiry and another about a week before. If your certificate renews automatically, verify the renewal after it runs. A renewal can succeed for one hostname while a redirect, CDN setting, or an alternate domain still presents an older certificate.
Your next step
Use the SSL Certificate Checker for a quick pre-flight check, then test the important public URL in a normal browser. This gives you a lightweight routine without adding a monitoring subscription before you need one.
Use this as a small, repeatable check rather than a one-time task.