Verify HTTPS security, expiration, issuer, and certificate details for any domain.
RankRebel keeps an eye on your sites so small problems never become outages.
Start for $7An SSL/TLS certificate is what turns http:// into https:// — it encrypts the connection between a browser and your server and proves the site is who it claims to be. When that certificate expires or is misconfigured, browsers stop trusting it and show a full-page security warning instead of your page.
This checker opens a live TLS connection to the domain you enter and reads the certificate the server actually presents — not a cached record. You get the real status, who issued it, every hostname it covers, and exactly how many days remain before it expires.
Check whenever you launch a site or change hosting, and then periodically — monthly is plenty for most sites. If your certificate auto-renews (for example via Let’s Encrypt), a quick check a week before the renewal date confirms the automation actually worked.
Browsers stop trusting the connection and show a full-page “Your connection is not private” warning. The page is effectively unreachable for most visitors until you install a valid certificate, and search crawlers may flag the site as insecure.
Yes. HTTPS is a lightweight ranking signal, and more importantly a broken certificate removes the secure connection Google expects, hurts user trust, and can crater the engagement metrics that influence rankings.
Yes — the SSL Certificate Checker is completely free with no sign-up. It reads the public certificate any server presents during the TLS handshake.