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Free SSL certificate checker

Free SSL Certificate Checker. Is Your Site's SSL Valid?

A website's SSL certificate is the padlock in the browser bar. It tells visitors (and Google) the connection is encrypted. Type your URL below and SiteGuardian opens the TLS handshake, reads the certificate, and reports the issuer, expiry date, days remaining, an A, F grade, and any chain issues. No account required to see the report.

Chain-link fence with a single padlock, photographed with a shallow depth of field.
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Include the https://— that's where SiteGuardian will open the TLS handshake. No account needed to see the report.

What you'll see

  • Whether the certificate is currently valid.
  • Who issued it and when it was issued.
  • The expiry date and how many days remain.
  • An A, F grade for the certificate health.
  • A short explanation if the certificate is broken or expired.

Want your SSL watched for you?

Skip the manual checks — SiteGuardian watches your URL around the clock and emails you the second it goes off.

Get continuous SSL monitoring

SiteGuardian is the website uptime monitor built for small businesses. It pings your site, checkout, contact forms and SSL. And emails you the second something breaks.