Online Tool Store
Email Header Analyzer
Paste raw email headers to see a clean summary — sender, subject, authentication results, and every delivery hop in order. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example shown — paste headers from "Show original"/"View source" in your email client.
Summary
Authentication
Delivery hops (in order received)
How it works
- Copy the raw headers from your email client and paste them in.
- Key fields (From, To, Subject, Date) and authentication results are pulled out automatically.
- Every "Received" hop is listed in chronological order, showing the path the message took.
FAQ
Where do I find raw email headers?
Most email clients have a "Show original", "View source", or "Show headers" option in the message menu — copy that entire text and paste it in.
What do SPF, DKIM, and DMARC mean?
They're email authentication checks: SPF verifies the sending server is authorized for that domain, DKIM verifies the message wasn't altered in transit via a cryptographic signature, and DMARC ties both together with a policy. "Pass" on all three is a good sign; failures don't always mean the email is fake, but are worth extra scrutiny.
Are Received headers reliable?
Mostly, but not perfectly — each mail server that handles a message adds its own Received header, and while legitimate servers add accurate ones, headers before the point a message enters a trusted network can be forged by the sender.
Are the headers I paste uploaded anywhere?
No — parsing happens entirely in your browser.
How we compare
| Feature | Online Tool Store | Reading raw headers manually | Other online analyzers |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | ✓ | ✗ |
| Delivery hops laid out in order | ✓ | ✗ | ✓ |
Reading a raw header block by eye is tedious — Received lines appear newest-first and wrap across multiple lines. Email Header Analyzer untangles that into a clean summary.