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SEO Tools

DNS & SSL Certificate Checker

Check your domain's SSL certificate and DNS records — verify HTTPS is valid and your email authentication (SPF, DMARC) is properly configured.

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What the tool checks

  • SSL certificate validity, issuer, and expiration date
  • HTTPS functionality and certificate chain
  • DNS records (A, AAAA, MX)
  • Email authentication records (SPF and DMARC)
  • Overall domain health status

Why it matters

A valid SSL certificate is a confirmed ranking factor and a fundamental trust signal — browsers display prominent warnings for non-HTTPS sites, which tanks user confidence and click-through rates. Correct SPF and DMARC records protect your domain from being used in phishing attacks and improve email deliverability.

Detailed guide in the help center

Frequently asked questions

Is SSL/HTTPS important for SEO?

Yes. HTTPS is a confirmed (lightweight) ranking signal, and more importantly it's a trust prerequisite — browsers flag HTTP sites as 'Not Secure,' which hurts user confidence.

What are SPF and DMARC?

DNS records that authenticate which mail servers are authorized to send email from your domain. They protect against email spoofing and improve inbox deliverability.

What happens when an SSL certificate expires?

HTTPS stops working and visitors see a browser security warning. Certificate renewal should be handled before expiry to avoid any interruption in service.

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