Free Tool

EML to HTML Converter

Upload any .eml file to parse its MIME headers, render the HTML body, and extract the raw HTML. Everything runs locally — no files are uploaded to any server.

All processing happens in your browser. No files are uploaded to any server.

Drop your .eml file here, or click to browse

Maximum 10 MB

Understanding EML Files

What is an EML file?

An EML file is the standardized RFC 5322 format for storing individual email messages. It contains all headers (From, To, Subject, Date) and the MIME body (HTML, plain text, attachments). Exportable from most email clients.

Why convert EML to HTML?

Extract the HTML content for debugging rendering issues across email clients, archive campaigns for compliance, review email composition at the time of sending, or analyze tracking pixels and links.

Is it safe to upload an EML file here?

This tool processes everything locally in your browser using JavaScript's FileReader API. No data leaves your device — no files are sent to any server.

What if my EML file has no HTML part?

Many transactional emails contain only plain text. This tool will display the plain text body in that case. Both text/html and text/plain MIME parts are supported.

Why We Built This Tool

Debugging email delivery issues requires understanding the raw email structure — headers, MIME parts, encodings, boundaries. EML files contain this complete structure. Manually parsing MIME boundaries, decoding base64/quoted-printable encodings, and finding the HTML part is tedious and error-prone. This tool extracts it automatically.

What Goes Wrong Without This

Email clients render the same HTML differently — what looks good in a preview might be broken in Gmail, Outlook, or Apple Mail. Teams need to extract the exact HTML that was sent to test it in different rendering environments. Without extraction, you're debugging blind.

Who This Tool Is For

E-commerce & DTC Brands

Extract HTML from failed campaign emails to debug rendering and deliverability issues. Understand exactly what was sent before troubleshooting.

Email Marketing Agencies

Extract sent emails for client compliance reviews and performance analysis. Test HTML across real inboxes to diagnose rendering failures.

B2B SaaS & Outbound Teams

Extract transactional email HTML to debug production rendering issues. Verify tracking pixels, links, and formatting survived transmission.

Frequently Asked Questions

What information is in an EML file?

An EML file contains the complete RFC 5322 email message: all headers (From, To, Subject, Date, Message-ID, etc.), the MIME structure, and the body (HTML, plain text, attachments). It's the raw email as it was transmitted between mail servers.

Why would I need to extract HTML from an EML?

To debug rendering issues, archive campaigns for compliance, review email composition at sending time, or test HTML in different email clients. Extracting lets you analyze the exact email that was delivered.

Where do I get an EML file?

Most email clients can export emails as EML: Gmail (download > .eml via browser console or third-party tool), Outlook (File > Save As > .eml), Apple Mail (File > Save As), or Thunderbird (right-click > Save As). Forwarded emails from support tickets often include the raw .eml.

Do I need an InboxEagle account to use this tool?

No. This tool is completely free and requires no account or sign-up. InboxEagle provides it as a standalone resource for email marketers, developers, and agencies.

Extracted the HTML — Now Test It in Real Inboxes

Extracting HTML from an EML tells you what was sent. InboxEagle's inbox rendering tests show you how that HTML looks in Gmail, Outlook, and Apple Mail — across dark mode, mobile, and desktop — by actually delivering to seed mailboxes.

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