Free SEO Tools
HTTPS/SSL Checker
Enter a domain to check its SSL certificate validity, issuer, expiry, and whether HTTP redirects to HTTPS.
About this tool
This connects directly to the domain's HTTPS port and reads its certificate using Node's own TLS stack — no third-party SSL-checking service is used. Trust status reflects Node's own certificate validation (chain, dates, and hostname), reported as-is rather than re-interpreted.
Frequently Asked Questions
- What does this tool check?
- Certificate validity, issuer, expiry date, days remaining, and whether HTTP redirects to HTTPS.
- How is the certificate read?
- By connecting directly to the domain's HTTPS port with Node's own TLS stack — no third-party SSL-checking service is used.
- What does "not fully trusted" mean?
- It reflects Node's own certificate validation (chain, dates, hostname) — reported as-is, not re-interpreted.