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Website health checker

Runs concurrent checks on one domain for DNS records, DNSSEC records, HTTPS reachability, redirects, security headers, cookies, robots.txt, sitemap and email security into one scored report, and marks the SSL row as not checkable from a browser.

Press the button to run the checks
Nothing leaves this page until you do. The report scores nine checkable rows; the SSL certificate row always reads unable to check, because a browser page cannot see the certificate chain.

This is a first pass, not an audit. It reads DNSSEC record presence, not cryptographic validation; it probes /sitemap.xml only, not paths declared elsewhere; it checks five common DKIM selectors; and it cannot see the TLS certificate. Rows that could not complete sit out of the score fraction on both sides, so a timeout never reads as a broken site.
Options

More network tools

- Live DNS lookup (/network/dns)
- HTTP timing probe (/network/http-timing)
All network tools (/network)

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Canonical HTML: https://nutter.tools/network/website-health-checker
Markdown version: https://nutter.tools/network/website-health-checker.md
Plain-text version: https://nutter.tools/network/website-health-checker.txt
Agent index: https://nutter.tools/llms.txt