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Free email header decoder
Paste raw email headers to unfold wrapped lines and decode encoded names and subjects. Nothing is uploaded.
Paste a raw header block. Folded lines are joined and encoded names or subjects are decoded in this tab.
| Header | Decoded value |
|---|
How it works
Email clients often hide the real header values. This tool shows the decoded text.
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Step 1
Paste headers
Copy the raw header block from “show original” in Gmail, Outlook or any .eml file.
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Step 2
Decode
Folded lines are joined and =?utf-8?B?...?= or Q-encoded words are turned into readable text.
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Step 3
Copy the result
Use the table or copy decoded headers as plain text. Nothing leaves this tab.
Header decoder FAQ
Is anything uploaded?
No. Decoding runs in your browser on this device.
What is RFC 2047?
It is the encoding used when a subject or display name contains non-ASCII characters, such as Café.
Can I decode a whole email?
Yes, extra body text is ignored. For a full message use the EML viewer. For the hop list use Received path.
Related
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