SSL Tools

SSL Expiry Checker

Check exactly when a domain's SSL certificate expires and how many days remain.

Enter a domain to check its SSL certificate's expiry date and remaining days.

More SSL Tools

View all 3

SSL Certificate Checker TLS Version Checker

JustChecker alerts you automatically before any SSL certificate expires.

What Is the SSL Expiry Checker?

It reads a website's live SSL/TLS certificate and tells you the exact expiry date and how many days are left. An expired certificate makes browsers show a full-page security warning, which stops most visitors immediately.

When to Use It

To confirm that automatic renewal (for example Let's Encrypt with Certbot) actually worked.
To audit client or company websites before certificates run out.
After moving hosting, when renewal jobs are easy to lose.

How to Use It

Enter the domain.
Run the check and note the expiry date and remaining days.

Understanding the Result

With 90-day certificates, fewer than about 30 days remaining usually means automatic renewal has not run yet. Fewer than 7 days is urgent. Remember that each hostname can have its own certificate, so www, the bare domain and subdomains may expire on different dates.

Limitations

This is a one-time check - it does not send reminders. For full certificate details such as issuer and covered names, use the SSL Certificate Checker.

Frequently Asked Questions

Most certificate authorities recommend renewing at least 30 days before expiry, leaving room to resolve any renewal or DNS-validation issues - many browsers hard-block a site the moment its certificate actually expires, with no grace period.

Every major browser shows a full-page security interstitial rather than a subtle warning, and most visitors simply leave rather than click through - an expired certificate effectively takes the site offline for HTTPS visitors.

Lifetimes vary by issuer - automated authorities like Let's Encrypt issue 90-day certificates specifically to encourage automated renewal, while commercial authorities have historically offered longer terms.

No - this is a read-only monitoring tool. It reports exactly how many days remain so you (or an automated renewal process such as Certbot/ACME) can act before the deadline.

If your server hasn't been restarted or reloaded to pick up a newly-issued certificate, it may keep presenting the old one over live connections - this checker reports exactly what the server is currently serving.

A certificate expiring soon is still fully valid and trusted right now, but needs attention - an already-expired certificate is immediately untrusted by every visiting browser, with no delay.

Not at all - that reflects a longer-lived certificate or a recent renewal. This checker is most useful as an ongoing monitor precisely because the "safe" window shrinks every day as the expiry date approaches.

Indirectly - search engines generally cannot properly crawl a site throwing a browser security error, and an outage caused by an expired certificate can affect crawl trust and click-through rates from search results.