DMARC Record Checker

About

DMARC Record Checker is a fast, privacy-friendly tool for email administrators, IT professionals, and security teams who need to verify DMARC configuration at a glance.

Enter any domain — or let the extension auto-fill the site you're currently visiting — and instantly see whether a valid DMARC record is published, how strict the policy is, and what could be improved.

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WHAT YOU GET
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• Instant DMARC lookup via DNS-over-HTTPS — no servers, no tracking
• Auto-fills the domain of your current browser tab
• Full raw TXT record with one-click copy
• Clear policy breakdown: p=, sp=, pct= with plain-English explanations
• Tag-by-tag analysis covering v, p, pct, rua, ruf, sp, adkim, aspf, fo, rf, ri
• Health score with pass / warn / fail checks against RFC 7489
• Actionable recommendations to strengthen your configuration
• Identifies missing rua=, weak policies, low pct, and alignment issues
• Clean, modern interface that works on any domain

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WHO IT'S FOR
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• Email administrators auditing their domains
• IT and security teams verifying customer or vendor configurations
• Penetration testers and OSINT researchers
• Marketers troubleshooting deliverability
• Anyone curious whether a brand has DMARC enforcement

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PRIVACY
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• No accounts, no sign-ups, no analytics
• No data is collected, stored, or transmitted to any third party other than the public Google Public DNS resolver used to perform the lookup
• Runs entirely in your browser — no background scripts, no tracking
• Open and inspectable source

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HOW IT WORKS
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The extension queries the _dmarc.<domain> TXT record using Google's public DNS-over-HTTPS endpoint, parses each tag according to RFC 7489, and runs a series of validation checks to score the configuration.

Click the extension icon, confirm or change the domain, and review the full report.