Is this DMARC analyzer really free?

Yes, completely free with no limits. There's no account required, no usage caps, and no premium tier. You can analyze as many DMARC aggregate reports as you want.

Is my DMARC data private?

100% private. All file processing happens entirely in your browser using Web Workers. Your DMARC XML files are never uploaded to any server. The tool uses IndexedDB for local persistence so your data stays on your device across sessions.

What file formats does the DMARC analyzer support?

The analyzer supports raw DMARC XML files, ZIP archives containing XML reports (the most common format sent by Google, Microsoft, and Yahoo), and GZIP-compressed XML files. You can upload multiple files at once for aggregate analysis.

How does sender identification work?

The analyzer identifies email services using two methods: static IP range detection (recognizing well-known IP ranges for Microsoft 365, Google Workspace, Amazon SES, SendGrid, and other major providers) and optional IP enrichment via geolocation lookups. Static detection works instantly with no external API calls.

What makes this better than other free DMARC analyzers?

Most free DMARC tools analyze only one report at a time and require account creation. This tool supports multi-file aggregate analysis, provides service-specific remediation recommendations (e.g., exact steps to enable DKIM in Microsoft 365), exports to CSV/PDF, and processes everything locally for privacy. No other free tool offers this combination.

What does it mean when SPF passes but DKIM fails?

SPF passing means the sending server is authorized to send email for your domain. DKIM failing means the messages aren't being cryptographically signed with your domain's key. This commonly happens with Microsoft 365, Google Workspace, or other services where DKIM signing needs to be explicitly enabled for your custom domain. The analyzer provides service-specific instructions to fix this.

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DMARC Report Analyzer

Upload your DMARC aggregate reports and get instant insights into email authentication, sender identification, and actionable recommendations.

100% Private — files never leave your browser

No account required

Supports XML, ZIP, and GZIP

Need Help With Email Security?

DMARC is just one piece of the email authentication puzzle. TwoChi can help you implement SPF, DKIM, and DMARC properly — ensuring your emails reach their destination and your domain stays protected.

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