FREE · DEVELOPER TOOLS
Email Header Analyzer.
Summarize received chains and authentication claims from pasted mail headers.
How to use Email Header Analyzer
Enter your input, adjust settings and generate locally. Review the output before use.
How it works
Summarize received chains and authentication claims from pasted mail headers. Literal summary only. Headers can be forged; trust depends on the receiving server. No DNS lookup or signature verification. Input remains in this browser page.
Example
Run the editable example to inspect the result.
Questions about Email Header Analyzer
Is Email Header Analyzer free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Literal summary only. Headers can be forged; trust depends on the receiving server. No DNS lookup or signature verification. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.