Convert MSG to EML Online

The free online mail converter that transforms EML, MSG, PST, and MBOX files into PDF, HTML, Word, and more — no software required.

CoolUtils online mail converter supports all major email formats as input — EML, MSG, PST, OST, and MBOX — and converts them to PDF, HTML, DOC, TXT, JPEG, and other output formats. Upload the file, select the output format, and download the converted document in seconds. No installation, no registration, completely free.

CONVERT MSG to EML ONLINE

1) Upload MSG file to convert

Drop files here, or Click to select

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Allowed file types: pst, ost, eml, msg, mime, smime, p7m, mbox, dbx, vcf, vmbx, opf, asice, cpgz, lzh, zcf

2) Set converting MSG to EML options

3) Get converted file

DOWNLOAD CONVERTED FILE

Full version

Get Total Mail Converter to convert your emails safely.

Convert Emails in Batch!;
Convert MSG to EML files in 3 clicks;
Have a desktop converter that works without the Internet;
Keep your emails safe, don't send them to the web;
Get more accurate MSG to EML file results with the powerful engine;
Enjoy additional features like merging, parsing, signatures addition, viewing, and comparing in one app when you convert MSG files;
Process multiple file formats, including text messages, Microsoft Entourage, Apple Mail, Thunderbird, IncrediMail, Office Outlook Express, and more.
Use the MSG to EML file converter without file size restrictions.

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Total Mail Converter

Convert emails from multiple sources to a variety of formats.

Filter emails that you want to process with our 2-level filtering.

Useful data saving options - convert only necessary data from your emails.

Unique output files formatting options specify how your files will look.

Affordable Price - pay once for a lifetime license with no hidden fees.

Command Line Support - convert emails via command line.

Fast batch conversion - convert multiple emails simultaneously.

High security options - protect your output PDF files.

Various file naming and date saving options - organize your output files easily.

Variety of attachment saving options - choose how to save attachments.

Trust - you can rely on powerful email converters from CoolUtils.

Easy to use even for beginners - enjoy clear user-friendly interface.

How to convert MSG to EML?

💾 Upload Your File: Go to the site, click on «Upload File,» and select your MSG file.

✍️ Set Conversion Options: Choose EML as the output format and adjust any additional options if needed.

Convert and Download: Click 👉«Download Converted File»👈 to get your EML file.

Cloud Based

There is no need to install any software to convert MSG to EML with CoolUtils. Simply access the internet, and you can easily convert your file online with our service.

Secure

Our hardware operates in top-tier, highly secure data centers equipped with advanced electronic surveillance and multi-factor access control systems.

Ease of Use

Converting MSG to EML online has never been so simple. Drop your Microsoft Outlook message file and the converter produces a standard RFC 2822 EML file — importable into Thunderbird, Apple Mail, Gmail, and any email client that accepts EML. Escape Outlook's proprietary format with no data loss. No Outlook required.

Privacy

We understand the importance of privacy, which is why we've developed a comprehensive privacy policy detailing how we handle your files and personal information. You can read the policy here.

MSG File

File extension	.MSG
Category	Document File
Description	MSG file is a MS Outlook email saved to a separate file. Such mail format is also used in The Bat!, Windows Mail, MDaemon, etc. It contains email fields and attachments, supporting both plain text and HTML mail formatting. As a rule, the mail content is encoded by base64 scheme. Encoding is required for mail to pass the mail servers that originally process text only. MSG can be opened in the program version it was created in, and the file will conflict with all other applications. To convert .MSG to PDF, HTML, TXT or other formats use the online converter.
Associated programs	CoolUtils MSG Viewer
Developed by	Microsoft
MIME type
Useful links	MSG Formats More detailed information on MSG files
Conversion type	MSG to EML

EML File

File extension	.EML
Category	Document File
Description	EML files are commonly used for email files generated in Outlook Express and other mail systems. EML emails are stored in standard MIME RFC 822 format. These files include the email headline and body in text ASCII format. Emails, attachments, and hyperlinks are all included when converting EML to PDF. Users can export EML files for archiving and storage and check for harmful code. EML files are compatible with Microsoft Entourage, Apple Mail, Thunderbird, IncrediMail, Outlook Express, and more.
Associated programs	CoolUtils Mail Viewer Apple Mail IncrediMail Microsoft Outlook Microsoft Windows Live Mail Mozilla Thunderbird
Developed by	Microsoft
MIME type
Useful links	More detailed information on EML files

2026-01-14

Migrated 3,000 MSG files from our corporate Outlook archive to Thunderbird in one batch — every email opened perfectly with attachments intact. Saved us days of manual work during the office migration.

Marcus Hoffmann

2026-03-07

I switched from Outlook to Apple Mail and needed my old MSG emails in EML format. Converted over 800 messages without a single error, and all the headers and timestamps were preserved correctly.

Priya Venkataraman

2026-05-02

Used this to convert client correspondence for long-term archiving — EML is much better for storage since it opens in any mail client. Conversion was fast and the output files are clean.

Tomasz Wiśniewski

Rating MSG to EML

4.7 (480 votes)Rate It

Convert MSG to EML — Frequently Asked Questions ▼

What is the difference between MSG and EML?

MSG is Microsoft Outlook's proprietary binary format for storing a single message. EML is the open RFC 2822 plain-text format used by Thunderbird, Apple Mail, and most other clients. Converting MSG to EML makes messages accessible outside the Outlook ecosystem.

Will my email attachments be preserved when converting MSG to EML?

Yes. Attachments stored in the MSG file are re-encoded as base64 MIME parts in the EML output, which is how other email clients expect to find them. The attachment names and types are preserved.

Can I import the resulting EML file directly into Thunderbird?

Yes. Thunderbird accepts EML files via drag-and-drop into a folder. You can also use the ImportExportTools NG add-on for bulk imports of multiple EML files.

Does conversion work for MSG files with HTML-formatted bodies?

Yes. HTML-formatted message bodies are preserved in the EML output as a text/html MIME part. Plain-text bodies are preserved as text/plain parts.

Is there a risk that the converted EML will not display correctly in some clients?

EML is a well-defined standard, so compatibility issues are rare. Very old Outlook messages with custom rich text formatting may lose some RTF-specific styling, as EML does not support RTF as a MIME type.

Can I convert MSG files without having Microsoft Outlook installed?

Yes. This online converter processes MSG files server-side without any dependency on Outlook. The desktop tool Total Outlook Converter Pro also does not require Outlook to be installed.

How do I convert a large archive of MSG files to EML in one operation?

Total Outlook Converter Pro ($49.90) supports command-line batch processing: TotalOutlookConverterPro.exe C:\msg_folder C:\eml_output /ConvertTo eml /ProcessRecursively. It processes thousands of files without any manual steps.

Convert MSG to EML Online

IT administrators and email migration specialists convert MSG files to EML when moving from Microsoft Outlook to Thunderbird, Apple Mail, or any other RFC 2822-compatible email client.

Cross-client compatibility — EML is an open standard; MSG is Outlook-only binary format
Preserves message content — headers, body, and attachments survive the conversion intact
Import-ready output — most email clients import EML files directly via drag-and-drop or import wizard
No Outlook license required — once converted, EML files are accessible without Microsoft Office
Fast online processing — no installation; upload and download in seconds

What Is MSG?

MSG is Microsoft Outlook's proprietary binary format for storing a single email message, including its headers, body, attachments, and metadata. The format is documented by Microsoft but requires specific libraries or Outlook itself to read correctly. It is not natively supported by non-Microsoft email clients.

What Is EML?

EML is the plain-text format for individual email messages defined by RFC 2822. Thunderbird, Apple Mail, Windows Mail, and dozens of other clients use EML natively. The format is human-readable, open, and supported by virtually every email import tool. Attachments are base64-encoded within the file.

Online Converter vs Desktop Converter

Feature	Online (this page)	Total Outlook Converter Pro (desktop)
Batch conversion	✓ Single file	✓ Entire folders, recursive
File size limit	Up to 50 MB	No limit
Automation / scripting	✗	✓ Command-line, .bat, Task Scheduler
Files stay local	✗	✓ No upload required
Price	Free	From $49.90

Batch CLI example: TotalOutlookConverterPro.exe C:\msg_files C:\eml_output /ConvertTo eml /ProcessRecursively

How to Convert MSG to EML

Click Choose File and select your .msg file
The format is detected automatically
Select EML as the output format
Click Convert — processing takes a few seconds
Click Download to save your EML file
Drag the EML file into Thunderbird or Apple Mail to verify it imports correctly

When Do You Need MSG to EML?

Email client migration — move messages from Outlook to Thunderbird or Apple Mail
Outlook license expiry — preserve messages in an open format after ending an Outlook subscription
Cross-platform teams — share messages with colleagues using Linux or macOS mail clients
Developer use — process email data with libraries that support EML but not MSG
Long-term archiving — EML is a documented open standard; MSG depends on Microsoft's continued support