SSL/TLS
SSL Checker
Inspect TLS certificate issuer, expiry, SAN vs hostname match, chain, and HSTS. Direct connection from this server — not SSL Labs, not a letter grade.
Quick answer
Paste a hostname to ssl-check the live certificate: issuer, expiry, SAN coverage (does this host match?), chain, and HSTS. This is a TLS handshake from our server, not a website-legitimacy or malware scan.
Certificate check runs on our server — results in seconds.
About this tool
SSL/TLS trust affects browser warnings and crawlability. This tool reads the certificate the host presents on port 443. It does not use SSL Labs and does not assign a security grade.
How to use
- Enter a hostname or URL (for example: example.com or https://example.com).
- Run the check and inspect issuer, expiry, SAN coverage, and chain trust indicators.
- Fix detected issues, then re-run this checker and related header checks.
Common use cases
- Pre-release SSL checks before deploying login, checkout, or API endpoints.
- Incident triage when users report certificate or browser trust warnings.
- Routine SEO and security hardening checks across critical landing pages.
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.
Mixed content on HTTPS pages
Secure pages still load HTTP assets. Update links to HTTPS to avoid browser trust degradation.
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.
Pro tips
- Monitor certificates with renewal alerts at least 30 days before expiry.
- Include all production and redirect hostnames in SAN coverage.
- Validate SSL together with HSTS and CSP to reduce partial-security configurations.
FAQ
How do I SSL check a domain?
Enter the hostname (example.com) or a full https URL and run the check. You get issuer, valid-from/to, days left, whether the hostname matches SAN/CN, SAN names, chain subjects, and whether HSTS is present.
Is this powered by SSL Labs?
No. The check is a TLS connection from this server (tls.connect). There is no Qualys SSL Labs grade.
Does a valid SSL certificate guarantee the site is legitimate?
No. Encryption to a host is not a scam check. Use Website Checker for URL patterns plus a live HTTP fetch.
What should I do if SSL is valid but users still report warnings?
Check chain completeness, hostname mismatches on redirects, and mixed content. Browser warnings often come from these gaps.
Related security tools
Run a full security check
After this tool passes, run related header and policy checks to catch transport and browser-level risks.