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EML File Viewer

Open and view EML email files instantly. View headers, message body, and download attachments — all in your browser, nothing uploaded.

Your files stay safe — processed entirely in your browser. Nothing is uploaded.

Drop EML file here

or click to select a file

Supports .eml email files.

How to Open and View EML Files

EML files are a standard format for storing individual email messages, widely used by email clients such as Microsoft Outlook, Mozilla Thunderbird, Windows Mail, and Apple Mail. Each EML file contains the complete email — including headers (subject, sender, recipients, date), the message body (in plain text and/or HTML), and any file attachments. While EML is an open standard based on RFC 5322 (the Internet Message Format), many users find they can't easily open these files outside of their email client, especially when received as downloads, exported for archival, or found on a shared drive.

Our EML File Viewer solves this problem by letting you open and read any EML file directly in your web browser. The file is parsed entirely on your device using the postal-mime library — a modern, well-maintained email parser built by the Nodemailer team. No data is sent to any server, so even the most confidential emails remain completely private. You can view the full email content, inspect headers, switch between plain text and HTML views, and download any attachments individually or as a ZIP archive.

This tool is particularly useful for digital forensics, email archival review, IT support, legal discovery, and anyone who needs to quickly inspect an EML file without installing dedicated software.

1

Select Your EML File

Drag and drop your .eml file onto the upload area, or click to browse and select it from your device. The tool processes one file at a time to display its full contents.

2

View Email Headers

Once the file is loaded, the tool displays the email subject, sender (From), recipients (To), CC fields, and the date the email was sent. This gives you an immediate overview of the message metadata.

3

Read the Message Body

The email body is displayed below the headers. If the email contains both plain text and HTML versions, you can switch between them using the tabs. HTML content is sanitized for security and rendered in a sandboxed iframe.

4

Download Attachments

All attachments are listed with their file names, sizes, and MIME types. Download each file individually with a single click, or use the 'Download All as ZIP' button to get all attachments in one archive.

Parsing is nearly instant for typical EML files. Since all processing happens locally in your browser, your email content — including headers, body, and attachments — never leaves your device. This makes our tool ideal for opening sensitive or confidential emails safely.

Frequently Asked Questions

What is an EML file?
An EML file is a standard email message format based on RFC 5322 (Internet Message Format). It contains the complete email including headers (subject, sender, recipients, date), the message body in plain text and/or HTML, and any file attachments encoded in MIME format. EML files are commonly created by email clients like Outlook, Thunderbird, and Apple Mail when you save or export individual messages.
Is it safe to open EML files with this tool?
Yes, completely safe. The EML file is parsed entirely in your browser — no data is sent to any server. If the email contains HTML content, it is sanitized using DOMPurify to remove any potentially harmful scripts, and then displayed in a sandboxed iframe with restricted permissions. This prevents any malicious code from executing.
Can I download attachments from EML files?
Yes! All attachments embedded in the EML file are extracted and listed with their original file names, sizes, and MIME types. You can download each attachment individually or use the 'Download All as ZIP' button to get all attachments in a single archive.
Why can't I open EML files on my computer?
EML files require an email client or specialized viewer to open. While programs like Outlook and Thunderbird can open them natively, many users don't have these installed or find the process inconvenient. Our browser-based viewer lets you open any EML file instantly without installing any software.
What email clients create EML files?
Most major email clients can export messages as EML files, including Microsoft Outlook, Mozilla Thunderbird, Windows Mail, Apple Mail, and many webmail services. EML is also the format commonly used for email archival and backup systems, as well as in legal discovery and digital forensics.
Does this tool support HTML emails?
Yes! Many modern emails are sent in HTML format with rich formatting, images, and styled layouts. Our viewer renders HTML email content in a secure sandboxed iframe, so you can see the email exactly as the sender intended. The HTML is sanitized with DOMPurify to ensure security.
Does this tool work on mobile devices?
Yes! The EML viewer works on any device with a modern web browser, including smartphones and tablets. Simply open the page, select your EML file, and the tool will parse and display the email contents with a fully responsive layout.