EML Header Viewer
Open .eml files in your browser: inspect headers, SPF/DKIM/DMARC verdicts, Reply-To mismatches, and the Received chain. Private, free, no upload.
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What is EML Header Viewer?
EML Header Viewer parses .eml email files entirely in your browser: it extracts key headers, shows SPF/DKIM/DMARC verdicts from Authentication-Results, flags Reply-To vs From mismatches, and traces the full Received chain - helping you identify phishing and spoofing without uploading the email anywhere.
Key Benefits
- Identify spoofed and phishing emails before clicking links
- Reply-To mismatch check catches common social engineering tricks
- Received chain traces the actual path through mail servers
- Authentication verdicts confirm legitimate sending infrastructure
- Completely private - the email never leaves your device
Common Use Cases
- •Investigating suspicious emails during security awareness training
- •Analyzing phishing reports for IT security teams
- •Verifying the legitimacy of unexpected business emails
- •Teaching email security best practices with real examples
How to Analyze Email Headers
- Save the .eml file: Download or copy the raw email content from your email client.
- Paste and analyze: Paste the content - headers, authentication verdicts, and the Received chain appear instantly.
- Review the findings: Check authentication results and Reply-To mismatch warnings to assess the email’s legitimacy.
Key Features
- Extracts From, To, Subject, Date, and Message-ID headers
- Parses Authentication-Results for SPF, DKIM, and DMARC verdicts
- Flags Reply-To vs From mismatches as phishing indicators
- Displays the full Received chain in order
- 100% local parsing - no upload, no server, no logging
- Works with any .eml file or pasted raw email content