When should I use it?
Use Email Header Analyzer when you need a private, upload-free browser tool for this task.
Email Diagnostic Suite
Email Header Analyzer
Paste raw headers or drop an .eml — get authentication, routing and privacy-first diagnostics locally.
Privacy-first — email content is parsed in your browser. DNS lookups (if used) go to Cloudflare DoH for domain records only — never your message body.
✓ Browser Processing
✓ No Upload
✓ Privacy First
✓ Free Forever
✓ Works Offline
Tip: drag & drop a .eml or .txt file. MSG binary is not supported — paste extracted headers or use EML.
Tool Options
Parses Authentication-Results, Received chain, X-MS-* (Outlook) and X-Google-* / ARC (Gmail) headers. No MSG binary — use EML or pasted headers.
Results
Results will appear here…
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FreeConverter.app Guide
What does Email Header Analyzer do?
Auth-Results, hops, spam flags, Outlook/Gmail insights and Health Score.
Who is it for?
Developers, marketers, students, and anyone who needs a free browser utility.
Example input
Paste text, markup, or choose a local file (processed only in this browser tab).
Example output
Instant on-device result you can copy or download — nothing leaves your device.
Browser processing100% in-browser
PrivacyLocal Processing
UploadNot required
DifficultyEasy
How It Works
Email diagnostics for admins, security teams and developers on FreeConverter.app.
1
Paste or upload
Drop .eml/.txt or paste headers from Outlook, Gmail or any client.
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2
Read the report
Check Auth-Results, hops, spam signals and Outlook/Gmail insight panels.
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3
Export
Copy or download TXT/CSV/JSON — or Print to PDF in your browser.
Email content stays in the browser. DNS tools only query public records via DoH.
About Email Header Analyzer
Analyze email headers in your browser: From/To, Auth-Results (SPF/DKIM/DMARC/ARC), Received hop timeline, spam indicators, Outlook & Gmail insights, and an Email Health Score. Export TXT, CSV, JSON or print. Part of FreeConverter’s Email Diagnostic Suite for Outlook, Exchange, Gmail and IMAP troubleshooting.
FAQs
No. Header and MIME analysis run entirely in your browser. FreeConverter servers never receive your email content.
Those tools query Cloudflare DNS-over-HTTPS from your browser. Only the domain (and DKIM selector) are sent to Cloudflare — not the email body.
Yes. FreeConverter.app browser email diagnostic tools are free to use.
No. FreeConverter.app processes this tool locally in your browser. Your input is not uploaded to our servers.
No. Email Header Analyzer on FreeConverter.app is free to use without creating an account.
Developers, marketers, students, and anyone who needs a free browser utility.