SSL/TLS
SSL Certificate Checker
Verify SSL/TLS certificate details — issuer, expiry, chain, HSTS. Response time in ms.
Certificate check runs on our server — results in seconds.
How to use
- Enter a domain, URL, or value relevant to SSL Certificate Checker.
- Run the check and review the output carefully.
- Apply recommended fixes, then run the check again to verify.
Common use cases
- Pre-deployment validation for SSL Certificate Checker.
- Incident triage when security checks fail in production.
- Periodic security review as part of technical SEO and hardening.
Example inputs
example.comhttps://google.comCommon issues and fixes
Certificate expired
The SSL certificate has passed its valid-to date. Renew the certificate with your CA.
Certificate not trusted
Missing or incorrect intermediate certificates. Include the full chain in your server config.
Hostname mismatch
The domain does not match the certificate SAN. Add the domain to the cert or use a SAN cert.
Recommended remediation
Renew expired certs via Let's Encrypt, Cloudflare, or your CA. Ensure the full chain is served. Add HSTS header for stronger security.
FAQ
Is SSL Certificate Checker free to use?
Yes. This tool is free and can be used without account registration.
Do you store submitted values?
Only the minimum processing needed for the check. For client-side tools, data stays in your browser.
How should I use these results?
Use the output as a diagnostic baseline, apply fixes in your stack, then re-run the check to confirm remediation.