Email Header Analyzer

Email Header Analyzer is a security-focused Firefox sidebar that turns raw email headers into actionable intelligence - instantly and privately.

Paste any email header and immediately see: • The real originating IP (with private ranges filtered). • Every IP address with one-click links to AbuseIPDB, VirusTotal, and IPinfo. • All email addresses with checks on Have I Been Pwned and EmailRep.io. • Full Received chain in correct chronological order. • SPF, DKIM, and DMARC authentication results. • Clean buttons to copy the original header or full analysis report.

Designed for security analysts, phishing investigators, and abuse teams who need speed without sacrificing privacy.

Privacy & Security First: • Works 100% offline — perfect for air-gapped environments. • No network requests, no telemetry, no data collection. • No unnecessary permissions. • Built with secure DOM practices (no innerHTML, no eval). • All processing happens locally in your browser.

Whether you're triaging phishing reports, investigating spam, or analyzing malware campaigns = Email Header Analyzer gives you professional-grade forensic tools in a always-available sidebar, without ever compromising your privacy.