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SSL Certificate Checker

Check a website's SSL certificate: whether browsers trust it, when it expires, who issued it, which names it covers and the certificate chain.

Good to know

About the SSL Certificate Checker

Want to know before it breaks?

KeepUpTime checks this for you around the clock and alerts you by email, WhatsApp or Slack. Plans from $15 per month with a 3-day free trial.

Why does SSL matter?

An expired or invalid certificate makes browsers show a full-page security warning, and most visitors leave immediately.

How long do certificates last?

Free Let's Encrypt certificates last 90 days; paid certificates up to about 13 months. Renew before the expiry date shown.

Can I get a free certificate?

Yes. KeepUpTime Pro can issue free Let's Encrypt certificates for your domains, and every plan warns you before expiry.