Email Header Inspector
Parse email headers, Received hops and authentication claims locally
Input stays in this browser. Nothing is uploaded or saved. Mail headers may contain private addresses and internal IPs.
You may paste a whole message. Only headers before the first blank line are read; the body is excluded.
Paste headers, then choose Analyze locally.
Message overview
Received hops (header order)
Authentication result claims
An untrusted sender can forge these fields. This tool does not verify SPF, DKIM or DMARC.
DKIM signature metadata
Parsing notes
View every header field
How to read this
Trace and authentication fields are shown as claims from the header. They do not prove origin or authentication. Common MIME subject encoding is decoded; attachments and bodies are not analyzed.
Up to 256 KiB of input, 500 fields and 8192 characters per line; excess is rejected or flagged.