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Email Header Analyzer

Summarize email headers, received hops, sender fields, and authentication hints locally

Browser-local processing The primary workflow runs in this browser tab.

No upload required Use supported files without sending them to a server.

Free workflow path Continue with related tools before any optional commercial links.

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Next workflow steps

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JSON FormatterFormat, validate, and copy readable JSON snippets Base64 Encoder DecoderEncode or decode Base64 text locally URL Encoder DecoderEncode and decode URL components safely Hash GeneratorGenerate SHA and MD5 hashes for text snippets

Short answer

Use Fileees Email Header Analyzer to summarize email headers, received hops, sender fields, and authentication hints locally directly in your browser with local processing, no signup, and a clean task-focused workflow.

Read the Email Header Analyzer guide

Best for

Trace SPF, DKIM, DMARC, and relay clues from copied email headers before escalating phishing reports or delivery failures.

Reviewing authentication results and relay chains from a suspicious or delayed message.
Summarizing mail routing evidence for support, security, or abuse desk tickets.
Separating useful header signals from private mailbox content before sharing.

Input and output

Inputs: plain text, structured data, developer snippets

Outputs: formatted text, encoded output, copied developer values

Privacy notes

Paste only the header block when possible; remove mailbox addresses and private message content before sharing output.
Authentication clues can include internal hostnames or message IDs, so review before copying to tickets.

Common mistakes

Pasting the full email body when only headers are needed.
Assuming one failed SPF or DKIM result explains every delivery issue.

Limitations

Header analysis explains signals; it does not make a final phishing or abuse determination.
Forwarded or rewritten headers can hide the original sending path.

How to use

Open Email Header Analyzer
Configure options
Download or copy the result

FAQ

Is Email Header Analyzer free?: Yes. Fileees Email Header Analyzer is free to use and does not require signup.
Are my files uploaded?: Most Fileees tasks run locally in your browser, so files stay on your device during processing.
When should I use Email Header Analyzer?: Use it when you need to summarize email headers, received hops, sender fields, and authentication hints locally quickly with a simple browser workflow.
Does it work on desktop and mobile?: The page is responsive, but large files are usually easier to handle on a desktop browser.

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