Find out if a certificate is expired or about to lapse - before browsers block your visitors.
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See whether the certificate is still active
Exact date and days remaining
Whether major browsers trust the chain
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Why expiry matters for every public website
An expired SSL certificate means browsers no longer trust the HTTPS connection. Chrome, Firefox, Safari, and other browsers warn users or block the page entirely.
Renewals are easy to miss on staging subdomains, CDN edges, or load balancers. This checker validates the live certificate served for the hostname you enter - the same view your visitors get.
Run a check after renewals or server changes. Add monitoring if you want email alerts before the next expiry.
Start free monitoring with email alerts. No credit card required.
See if a certificate is expired or near expiry in under a minute - no account needed.
Type the exact host visitors use, for example yourdomain.com or www.yourdomain.com.
Click Check SSL. We read the live certificate and show validity dates and trust details.
If the certificate is expired or days remaining are low, renew and reinstall, then re-check. Add monitoring so the next expiry does not surprise you.
What browsers show when TLS dates go wrong - and how to recover.
Browsers show a full-screen warning. Visitors leave and APIs may refuse HTTPS.
Issue a new certificate, install the full chain on the edge that serves traffic, then re-check the same hostname.
Apex works while www still serves an old certificate, or the reverse.
Run the expired-certificate check on each name that serves HTTPS and renew any that still lag.
Origin is renewed but the CDN edge was not updated.
Upload or re-select the new cert in the CDN, wait for propagation, then verify from the public hostname.
Certificate, DNS, and reachability history in one place.
Checks run from our servers - the same path users hit.
Turn a one-off check into monitoring in under a minute.
External probes so internal network blind spots do not hide issues.
Email and Telegram when something fails or is about to expire.
Start free - no credit card required to begin monitoring.
Start free monitoring with email alerts. No credit card required.
Catch date problems before users do.
Manual calendar reminders fail. Monitoring alerts are more reliable than memory.
Confirm the live edge shows the new Not After date before you close the ticket.
Forgotten staging certs expire too and still confuse clients and partners.
A renewed leaf with missing intermediates still triggers warnings. Confirm trust, not only the date.
Enter the domain here. We connect over HTTPS and read the certificate expiry date. If today's date is past the Not After field, the certificate is expired and browsers will show security warnings.
Browsers display warnings such as "Your connection is not private" and may block access. Visitors often leave immediately, which hurts conversions and SEO until the certificate is renewed.
Yes. Enter the exact hostname visitors use, such as www.example.com or api.example.com. Each hostname can serve a different certificate with its own expiry date.
Yes. Run unlimited one-off checks with no signup. Optional monitoring alerts are also free to start.