Grimfjord

Free

Site Check

Certificate expiry, redirect chain, security headers, DNS records and response timings for any public website.

Public sites only. We refuse addresses that resolve into private networks.

You get an HTML report you can keep or send to a developer, plus a plain-English summary right on the next page.

Free run · 3 free left today

By uploading you agree to the Terms and Acceptable Use policy. Files are deleted automatically after 72 hours.

What you get

  • SSL: issuer, validity dates, days left, how many hostnames it covers
  • Redirects: every hop from http to https and where it ends
  • Security headers: which of the six that matter are set, and which are missing
  • DNS: A, AAAA, MX, NS, TXT and CNAME records
  • Timings: DNS lookup, TCP connect, TLS handshake, first byte, full page
  • A plain-English summary of what is worth fixing
  • Private download link, no account needed for free runs
  • Files auto-deleted after 72 hours

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Good to know

We only check public websites. Addresses that resolve into private networks are refused, so this cannot be used to probe internal systems.