SSL/TLS & Website
Certificate expiry check
An expired SSL certificate turns your website into a browser warning. We check how many days yours has left.
Check this on your own domain now. It is free with a DomainGuard account and works on any domain. The check reads only what your domain publishes, and gives you a report you can send to whoever runs your website.
What we look at
We read the expiry date on each certificate your domain and its subdomains serve. One from an authority that renews automatically (Let's Encrypt, Google Trust Services, ZeroSSL and similar) is flagged only on its last day, because reaching that day means renewal has failed. A hand-renewed certificate gets a planning note at 30 days and is urgent at 14. Expired always fails. Our scanner reads this straight off your server, the way a browser does: every day for the domains DomainGuard watches on Starter and up, and whenever you press Scan now on a domain in your account. The quick one-off tools on this site cannot read a certificate, so they show whether HTTPS works but not this row.
Why it matters to your business
An expired certificate is a common reason a small business site suddenly shows a browser warning instead of the site. Automatic renewal can stop without anyone noticing: a changed DNS record or a moved site is enough. Certificates are also getting shorter-lived: under the CA/Browser Forum's rules, publicly trusted certificates issued since March 15, 2026 last at most 200 days, falling to 100 days in March 2027 and 47 days in March 2029, so renewing by hand is on its way out.
How to fix it
- Renew the certificate now, or trigger your host's automatic renewal.
- Find out why automatic renewal did not happen (a DNS change, a moved site, an expired card) and fix that too.
If you would rather not touch DNS or server settings yourself, forward this page and your report to whoever manages your website, or ask us to do it.
Keep an eye on it
A one-off check tells you how things stand today. On Starter and up, DomainGuard re-checks the domains it watches every day and alerts you in the app when something important changes, so you hear about it before a customer does.