DNS Health Checker
Run 8 DNS health checks on any domain using DNS-over-HTTPS. Verify A, AAAA, MX, NS, TXT (SPF/DMARC), SOA, CAA, and CNAME records instantly.
DNS Health Checker
Run 8 DNS health checks on any domain using DNS-over-HTTPS. Verify A, AAAA, MX, NS, TXT (SPF/DMARC), SOA, CAA, and CNAME records.
DNS Health Check
Frequently Asked Questions
What DNS records are checked?
A record (IPv4), AAAA record (IPv6), MX record (mail), NS record (nameservers), TXT record (SPF/DMARC), SOA record, CAA record (SSL authority), and www CNAME.
What is SPF and DMARC?
SPF (Sender Policy Framework) authorizes mail servers to send email for your domain. DMARC (Domain-based Message Authentication) builds on SPF and DKIM to protect against email spoofing.
Is the DNS Health Checker free to use?
Yes, the DNS Health Checker is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.
Is my data safe with this tool?
Absolutely. The DNS Health Checker processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the DNS Health Checker work on mobile devices?
Yes, the DNS Health Checker is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the DNS Health Checker in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the DNS Health Checker?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The DNS Health Checker works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About DNS Health Checker
DNS Health Checker is a free, browser-based tool in our Domain Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.