Open .EML Format Documents with EML Viewer Pro Software

Screen image of eml file viewer.

Documents with the .eml extension creep into our work and lives from many different vectors. This article discusses what these files are, how to open .eml files, and software to search and manage large quantities of them.

What are .eml documents?

.Eml document files are emails that contain the message and any file attachments accompanying the message. EML documents have been part of the internet for more than thirty years. They are formatted according to an open standard published in 1982 called RFC-822. This standard put forward the rules that has helped software developers create interoperable email clients such as Outlook Express, Windows Mail, Thunderbird, and others.

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How do I open .eml documents?
EML files are well supported across nearly all email clients, and it is not too difficult to find software to help you open them individually.  If you only have a few .eml documents that you would like to open, try this free online eml file viewer operated by Encryptomatic LLC. Upload your .eml file and then click “view,”  and it will appear in your web browser. File attachments in the email can be downloaded to your computer.  All uploaded emails are destroyed when your session ends, and no information is collected from the emails.
Image shows MessageViewer Online, rfc-822 compatible eml document viewer.
Open EML Documents In Your Browser With MessageViewer Online

While MessageViewer Online is perfect for opening a few .eml documents, if you want to manage thousands of them you’ll want a more specialized Windows software to handle the chore.


EML Viewer Pro is an advanced viewer for opening and searching eml documents. It can read Windows directories containing thousands of files,  rendering them in the viewing pane in their regular text or html formatting, and providing access to any accompanying file attachments.
While there are many applications that an open individual files, EML Viewer Pro excels at managing larger quantities of eml documents.
Image shows Eml Viewer Pro document viewer main screen with an html email rendered.
Eml document viewer
Searching a folder with hundreds or thousands of .eml formatted documents is easy with EML Viewer Pro.  Select the folder where your eml docs are located, and the click the search button. A form will appear where you can enter in your search criteria. You can perform a search across the subject, text, or search a date range.
Search options in Eml Viewer Pro. Enter search settings for .eml files.
Once you have located the .eml documents that are important to you, EML Viewer Pro will let you process those messages individually or in bulk. You can print them, or convert them to .pdf format, or a wide range of other formats.
Image shows export profile selection in Eml Viewer Pro.
Convert Eml Documents to PDF and other formats

A Look At MessageViewer Lite, The Simple .EML Viewer

Screen image of Message Viewer Lite menus.

When it comes to opening .eml email files, MessageViewer Lite is hard to beat. This inexpensive viewer accurately renders and prints individual .eml and .msg formatted email messages created by Outlook, Windows Live Mail, Thunderbird, Lotus and other email clients.

MessageViewer Lite has a limited set of features and is by design very easy to use. This has made it a popular tool for system administrators to deploy to their users.  After installation on a Windows device, any .eml or Outlook .msg file can be opened by clicking on it. The message will open up on your screen. Now you can print the email, or extract file attachments and save them to your hard drive.

File attachments can be dragged from the email and dropped on to the desktop.  Double clicking on a file attachment, such as a pdf file, will cause it to open in the appropriate software program on your computer.

Easy to use .eml or .msg email file viewer, MessageViewer Lite.
MessageViewer Lite main menu

MessageViewer Lite supports having multiple windows open, each showing a different email message.  Content can also be copied and pasted directly from the email window. MessageViewer Lite can be deployed to user desktops. It can also be used with hosted applications, such as a CRM app,  so that users will always have the ability to open email messages attached to client records.

MessageViewer Lite has just three menu items File, View and Help.

The File menu gives access to the Print function which will send the email to your printer.
Check File Associations will let you set MessageViewer Lite as your default Windows application for .eml or .msg files.

Screen shot of MessageViewer Lite's File menu options.
File Menu


From the File Menu, you can also set file associations for MessageViewer Lite.  Set it as the default application for .msg or .eml files.

The View menu has just one option that toggles the viewer between html and text mode. If you set it to text mode, then MessageViewer Lite will always display.eml and .msg files as text files, rather than html files.

The Help menu contains several useful options.

Screen shot of MessageViewer Lite's Help Menu
Help Menu

About provides the version number for your copy of MessageVeiwer Lite.
If the software is in trial mode, then Buy Now will open a browser window to allow you to purchase an activation code for the software.

Registration is where you can enter your activation code.

Start Logging is a function that you should only use if asked by the MessageViewer Lite support team. It’s used to help troubleshoot issues.

Check Update Now will tell MessageViewer Lite to see if a newer version of the software is available.

Configure Update allows you to tell MessageViewer Lite to automatically check for software updates.

MessageViewer Lite is the little brother to EML Viewer Pro, which is a more complete .eml and .msg file viewer that can export email messages to different formats.

You can try MessageViewer Lite free for 15 days.  The price to buy is just $24.99, with progressive discounts for multiple copies.

To see how MessageViewer Lite’s features compare to EML Viewer Pro, click here to compare .eml viewers.