Email Header Analyzer — Parse Raw Email Headers Online | DevKits
Parse raw email headers into a structured table. See From, To, Subject, Date, Return-Path, SPF, DKIM, DMARC, Authentication-Results, and the full Received chain. Perfect for debugging email delivery and spoofing. 100% local.
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CommentsPaste raw email headers to parse into a structured key-value table.
| From | Alice <alice@example.com> |
| To | Bob <bob@gmail.com> |
| Subject | =?UTF-8?Q?Hello_World?= |
| Date | Thu, 24 Jul 2026 10:29:45 -0700 |
| Return-Path | <sender@example.com> |
| Message-ID | <abc123@example.com> |
| Content-Type | text/plain; charset="UTF-8" |
| Received | from mail.example.com (mail.example.com [192.0.2.1]) by mx.google.com with ESMTPS id a1bc2d3e4f for <recipient@gmail.com>; Thu, 24 Jul 2026 10:30:00 -0700 (PDT) |
| DKIM-Signature | v=1; a=rsa-sha256; d=example.com; s=selector1; bh=...; b=... |
| SPF | pass (google.com: domain of sender@example.com designates 192.0.2.1) |
| DMARC | pass (policy=reject) |
11 headers parsed
What is Email Header Analyzer?
Email headers are the metadata that every email carries — from infrastructure headers like SPF (which server is allowed to send), DKIM (did the signature verify), and DMARC (what policy to apply on fail), to user-visible headers like From, To, and Subject. The Received chain traces every hop the email took from the sender's server to your inbox. Paranoid header analysis is the first step in diagnosing email delivery, spoofing, and phishing.
How to analyze email headers
- 1Open any email's raw source (Gmail → three dots → Show original).
- 2Paste the header text into the analyzer.
- 3See structured From, To, SPF, DKIM, DMARC, and Received chain.
Frequently Asked Questions
How do I find raw email headers?
Gmail: open the email → three dots → Show original. Outlook: ... → View message source. Apple Mail: View → Message → Raw Source. Thunderbird: Ctrl+U. Most email clients have a 'view original' or 'show source' option.
What does the Received chain tell me?
Each 'Received' header records one hop in the email's journey. They're appended in reverse order — the topmost Received header was the last hop before your inbox. Trace from top to bottom to reconstruct the email's path and spot spoofing.
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