Domain Tools
Look up, test and fix everything about a domain — DNS, email authentication, SSL certificates, security and registration details — from the same dashboard as the rest of your SEO work.
Domain Health Check
Enter any domain and get one scored report covering DNS, email, SSL, security and website basics — with the problems ranked and explained in plain English so you know what to fix first.
- Scored out of 100
- 40+ checks in one scan
- Saved reports and score history
DNS lookup & propagation
Look up any type of DNS record, see every record on one page, and check whether a change has reached resolvers around the world — so you always know what visitors and mail servers actually see.
- Every common record type
- Global propagation checker
- Nameserver consistency
Email authentication tools
Validate SPF, DKIM and DMARC, check mail servers and reverse DNS, and analyse email headers and DMARC reports — everything needed to keep your email out of the spam folder.
- SPF, DKIM and DMARC checkers
- Email header analyser
- DMARC report analyser
DNS security audit
Run a security review of a domain’s DNS: signing, certificate-issuance rules, nameserver hardening and subdomains that could be hijacked — scored and explained without the jargon.
- DNSSEC and CAA checks
- Dangling subdomain detection
- Zone transfer and nameserver tests
SSL & website checks
Inspect certificates, supported encryption versions, security headers, redirect chains and response times, so you catch expiring certificates and misconfigurations before visitors do.
- Certificate and expiry checks
- Graded security headers
- Redirects, status and response time
Domain & IP information
See who a domain is registered with, how old it is, when it expires and which subdomains exist — plus the details behind any IP address or hostname.
- Registration, age and expiry
- Availability and TLD details
- IP address and hostname lookup
Record generators
Build correct SPF, DMARC, DKIM, CAA, MTA-STS, TLS-RPT and BIMI records with a simple form — and get the exact host name and value to paste into your DNS.
- Guided forms with validation
- DKIM key pair generator
- Copy-ready host and value
Developer tools
A toolbox of everyday utilities for the people who manage websites: subnet calculators, IP converters, URL and hostname parsers, encoders, a JWT decoder, JSON formatter and more.
- Subnet and CIDR calculators
- Encoders and decoders
- Runs in your browser where possible
White-label reports & API
Turn a saved Domain Health or DNS Security report into a branded PDF, a no-login share link, or reach the tools programmatically via API.
- Branded PDF export
- Expiring, revocable share links
- A dedicated Domain Tools API
Why domain problems are an SEO problem
Search rankings depend on more than content and links. A broken DNS record can take a whole site offline for some visitors. An expired or misconfigured certificate throws a browser warning that sends people straight back to the results page. A missing redirect splits ranking signals between two versions of the same address. And when your email isn’t properly authenticated, the newsletters, invoices and outreach that support your marketing quietly end up in spam folders.
These problems are rarely dramatic, which is exactly why they go unnoticed. Domain Tools gives you a fast, plain-English way to check each of them — and to check them for any domain, not only the sites in your account. That makes it just as useful for a prospect’s audit, a client’s migration or a competitor’s setup as for your own website.
One place, no juggling
Every tool follows the same simple pattern: type a domain, get a clear answer, with each finding marked as passed, needs attention or failed and explained in ordinary language rather than raw technical output. Results have their own web address, so you can bookmark them or share them with your team, and the lookup tools can also return their answer as structured data for your own scripts.
The Domain Health Check is the best place to start, because it runs the important checks together and gives you a single score. From there, each specialist tool lets you dig into a problem, and the record generators help you write the fix correctly.
Once the foundations are sound, see how AI assistants treat the domain with AI Search Visibility, which shows whether they name or cite your brand for the questions your customers ask.
Frequently asked questions
Can I check domains that aren’t my own?
Yes. Domain Tools works for any public domain name, which makes it handy for pre-sales audits, migrations and competitor research. Fair-use limits apply so the tools stay fast for everyone.
Do these tools scan ports or check blacklists?
No. Domain Tools is deliberately limited to safe, read-only checks of DNS, email records, certificates, headers and registration data. It doesn’t port-scan, ping or probe servers in ways that could cause harm.
Is Domain Tools included in every plan?
What’s included depends on your plan — see Pricing for the current details.