lock SSL Certificate Checker

Check a domain's SSL certificate.

Issuer, validity dates, and days until expiry, checked live.

How to Use

1
Enter a domain name, with or without https://.
2
Click Check SSL Certificate.
3
Review the result - status, issuer, and how many days remain before it expires.

What does this SSL checker show?expand_more

The certificate's subject, issuer, validity dates, days remaining until expiry, and serial number, fetched directly from the live domain.

Why does it say a certificate is expired or invalid?expand_more

This tool intentionally connects even to sites with a bad certificate so it can show you exactly what's wrong, rather than just failing silently.

Is this SSL checker free to use?expand_more

Yes. 100% free - no account required, no watermarks, no usage limits.