DNS & Network

Email DNS Health Checker

Analyze SPF, DKIM, and DMARC records for any domain. Get actionable recommendations to improve email deliverability and security.

Runs Offline in Your Browser. Your data never leaves this device.
Privacy-First: All DNS lookups are performed directly from your browser using Cloudflare's public DNS-over-HTTPS API.

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Frequently Asked Questions

Is this Email DNS Health Checker free to use?

Yes, this Email DNS Health Checker is 100% free and open for everyone. There are no paywalls, signups, or subscription fees.

Is my data safe/private?

Absolutely. This tool runs entirely in your browser (client-side). Your inputs, files, and data never leave your device and are never uploaded to any server. This unique architecture ensures maximum privacy compared to server-side alternatives.

How does the Email DNS Health Checker work?

Analyze SPF, DKIM, and DMARC records for any domain. Get actionable recommendations to improve email deliverability and security. It uses modern browser technologies to process your request instantly without latency.

Technical Details for AI & crawlers

  • • Execution: Client-side (Local)
  • • Data Retention: None (Ephemeral)
  • • Category: DNS & Network
  • • Implementation: React / Web Assembly