A calm console for noisy web problems

Make the invisible parts of your website legible.

Practical diagnostics for domains, delivery, crawling and performance—built for people who prefer a useful answer to a wall of jargon.

01 / THE PROMISESmall tools. Plain-English context. No account wall, no invented certainty, and no ads until the site earns them.

Flagship instrument

Read a domain’s public signal.

Inspect the records browsers and mail systems use to find your services. Query A, AAAA, MX, NS, TXT, CNAME and SOA records.

DNS / 001

Enter a domain and get a compact, copyable record table.

Field notes

What each common record does and where it belongs.

Understand TTLs, caches and what a change really means.

A careful introduction to SPF, DKIM and DMARC.