An EML file is a saved email message that you can open with a compatible email application or, in some cases, a browser-based viewer. The easiest way to open an EML file depends on your device, the application you use, and whether you want to read the message, move it into a mailbox, or convert it to PDF.
This guide explains how to open EML files on Windows, Mac, iPhone, and Android, including methods for Outlook, Gmail, Chrome, and free viewing options. You’ll also learn how to troubleshoot files that won’t open and handle email files safely.
Quick answer: On Windows or Mac, right-click the file, choose Open with, and pick an email program such as Outlook or Apple Mail. On iPhone or Android, try the Files app or a mail app that supports EML. If nothing works, open the file on a computer or see the troubleshooting section below.
Table of Contents
What Is an EML File?
EML is a standard file format for saving one email message. The file holds the message headers (sender, recipients, date, subject), the body text, any formatting, and usually the attachments, encoded inside the file itself. Many email programs, including Outlook, Apple Mail, and Thunderbird, can save a message as an .eml file.
A few comparisons help:
- EML vs. PDF: A PDF is a fixed picture of a document. An EML file is the email itself, so an email program can still read its headers, reply to it, or move it.
- EML vs. PST: An EML file holds one message. A PST file is an Outlook data file that can hold an entire mailbox.
Because an EML file is mostly structured text, you can technically open it in a text editor, but you will see raw code rather than a readable email.
EML is not the only format used to store email messages. If you have an MBOX file instead, see our guide on how to open an MBOX file. If you need to save many Outlook emails in a single file, see how to export Outlook emails to a PST file.
How to Open an EML File: Quick Methods
| Method | Best for | Extra software needed? | Main limitation |
| Outlook (classic or new) on Windows | Reading a message with formatting and attachments | Outlook required | Behavior differs between classic and new Outlook |
| Apple Mail on Mac | Reading and filing messages on a Mac | No, Mail is built in | Appearance can vary by macOS version |
| iPhone Files app preview | Quick look at a saved message | Usually no | Preview may not show attachments or formatting well |
| Android email app | Reading a file you downloaded | Possibly | Default apps differ by device and manufacturer |
| Online EML viewer | Reading on a device without an email app | No installation | Requires uploading private email to a third party |
| Text editor | Last-resort check of raw content | No | Shows source code, not a formatted email |
| Print to PDF (after opening) | Sharing or archiving a readable copy | Needs an app that can open the file | Attachments and full headers may not carry over |
How to Open an EML File in Windows 10 and Windows 11
Windows does not guarantee an app that reads EML files. The Windows Mail and Calendar app was retired at the end of 2024, so do not assume it is installed or supported. The most reliable approach is to use an email program you already have, such as Outlook.
Short answer for Windows 11: right-click the EML file, choose Open with, and select Outlook or another email app you have installed. If none is listed, install one or use the steps below.
- Save the EML file somewhere easy to find, such as your Downloads folder.
- Right-click the file and choose Open with.
- Select Outlook (or another email program from the list) if it appears.
- If your preferred program is not listed, choose Choose another app, then More apps, and browse for it.
- To make the choice permanent, check Always use this app to open .eml files before confirming.
If the file opens in the wrong program: go to Settings > Apps > Default apps, search for .eml, and assign the program you want.
Plain-text fallback: right-click the file, choose Open with > Notepad. You will see headers and encoded body text. This confirms the file is not empty, but attachments appear as long blocks of encoded characters and HTML emails will not display properly.
How to Open an EML File on Mac
Apple Mail is the simplest option, because it is installed on every Mac and can read EML files.
- Locate the EML file in Finder.
- Right-click (or Control-click) it and choose Open With > Mail.
- The message opens in its own window. You can read it, print it, or drag it into a mailbox in Mail if you want to keep it there.
If Mail does not recognize the file, check that the file name ends in .eml. Other EML-compatible desktop clients, such as Thunderbird (free), can also open the file. As a last resort, TextEdit will show the raw source, with the same limitations as Notepad on Windows.
If Apple Mail is not opening messages correctly, our guide to troubleshooting Apple Mail problems may help you identify the issue.
How to Open an EML File in Outlook
Microsoft’s instructions differ by version, so identify which Outlook you use first.
New Outlook for Windows (per Microsoft’s support documentation):
- Open new Outlook.
- Open File Explorer and select the .eml file.
- Drag the file onto the reading pane.
You can also right-click the file, choose Open with > Outlook (new), or double-click it. If double-clicking fails, Outlook may not be the default app for .eml files; change it in Windows default app settings. Microsoft notes that new Outlook needs an active internet connection to open these files.
Classic Outlook for Windows: right-click the file and choose Open with > Outlook, or double-click it if Outlook is the default. Dragging an EML file into a mail folder is a commonly used way to add it to a mailbox, but results vary by version, and some sources report that the file ends up attached to a new message rather than imported as a standard email. Check the result before deleting the original. If double-clicking does not work, check your default app settings or open the file in another EML-compatible program.
Opening vs. importing: opening shows one message in a window. It does not add it to your mailbox. Importing a few messages by drag-and-drop is manageable, but a large collection of EML files is a migration task and usually needs a different approach (see the migration note at the end).
If your goal is to save messages from your mailbox rather than open an existing EML file, follow our guide on how to download emails from Outlook.
How to Open an EML File in Gmail
Gmail is a web service, and it does not offer a standard “open local EML file” or “import EML” button. Reading, attaching, and importing are three different things:
- Reading: Gmail’s interface is not designed to render a local .eml file you downloaded. If someone emails you an .eml file as an attachment, Gmail treats it as a file and you may need to download it and open it elsewhere.
- Attaching: You can attach an EML file to a new message and send it. This delivers the file; it does not add the original email to your mailbox.
- Importing: Gmail’s built-in import tools are for other mail accounts, not for local EML files. I could not find an official Google feature that imports local EML files directly, so treat any claim of one with caution.
Practical options:
- Open the EML file in Outlook, Apple Mail, or Thunderbird to read it.
- If you want the message inside your Gmail account, add the Gmail account to a desktop email program over IMAP, then move the message into a Gmail folder from there. Test with one message first.
- For many messages, see the migration note at the end.
To save a larger set of Gmail messages, see how to download a copy of your Gmail data.
How to Open an EML File on iPhone
- Save the file to the Files app (from Mail, Messages, or a download in Safari, tap Share > Save to Files).
- Open Files and tap the EML file. iOS will try to show a preview.
- If the preview is blank or garbled, tap Share and look for a mail app you have installed, such as Outlook, and open the file in it.
Treat the Files preview as something to try, not a guaranteed method. Quality varies by iOS version and by how the message was built, and sharing the file to another app does not guarantee it will open correctly. Attachments inside the EML may not be accessible from a basic preview. If the message matters, open it on a computer instead.
How to Open an EML File on Android
Android devices ship with different default apps, so the steps below are general.
- Download the file and find it in your Files (or My Files) app.
- Tap the file. If Android asks which app to use, choose an email app that supports EML files, such as Outlook, if installed.
- If you see an “unsupported file” or “no app to open” message, install a compatible email app, then try Share > Open with again.
- If the file is attached to an email in the Gmail app, try tapping the attachment first. Behavior varies by app version.
When no mobile app works, moving the file to a computer is the most dependable option.
How to Open an EML File Online for Free
Several websites let you upload an EML file and display it in the browser. They are convenient when you have no email program, but there are trade-offs:
- Upload required: Most work by sending your file to a server, which means a third party receives the full message and any attachments.
- Limits: File size caps, missing attachments, and broken formatting are common.
- Privacy: Anything confidential (legal, medical, financial, or business email) should not be uploaded to a site you have not vetted.
This guide does not recommend a specific online tool. If you use one, read its privacy policy, avoid sensitive messages, and prefer a local application whenever the content is private.
Simple rule: for private or business email, use a local email client. Consider a viewer you have verified only for non-sensitive messages.
Can You Open an EML File in Chrome?
Not reliably. Chrome does not natively render EML files as formatted emails. Depending on your setup, it may download the file, hand it to another app, or show it as plain text. Opening it as text only reveals the raw source.
Practical alternatives:
- Open the file with an email program (the better choice for readable results).
- Use a trusted converter or viewer that outputs HTML or PDF, which Chrome can display.
- Open the message in Outlook or Mail and print it to PDF.
How to Open or Convert an EML File to PDF
Opening an EML file in a PDF reader will not work, because a PDF reader cannot interpret EML. To get a PDF, open the message first, then print it to PDF.
- Open the EML file in Outlook, Apple Mail, or another compatible app.
- Choose Print (Ctrl+P on Windows, Command+P on Mac).
- Select Microsoft Print to PDF on Windows, or PDF > Save as PDF on Mac.
- Save the file, then open the PDF and check it.
What to verify: the message body, links, images, date, and sender. Attachments typically do not travel inside the PDF, and full technical headers are often missing. If you need evidence-grade preservation, such as for legal or compliance reasons, keep the original EML file alongside the PDF. A PDF is a readable copy, not a replacement.
Why Is Your EML File Not Opening?
| Problem | What to try |
| No compatible email app installed | Install or open Outlook, Apple Mail, or Thunderbird, then use Open with |
| Wrong default app | Reset the default for .eml in system settings |
| Damaged or incomplete download | Download or copy the file again, or request a fresh copy from the sender |
| Extension confusion | Check the file is truly .eml (not .eml.txt, .msg, or .emlx) and rename it only if the extension was altered by mistake |
| Unsupported browser or viewer | Open it in an email program instead |
| Permissions or blocked file | Verify the sender and file source first. Only if you trust the file, check Properties for an Unblock option; do not override a security warning on a file you do not recognize |
| Corrupt attachment or unusual encoding | Open the file in a different email program or read it in a text editor to confirm the content exists |
If none of these helps, ask the sender to resend the message as a forward or as a PDF.
Is It Safe to Open an EML File?
EML is simply a format, so it is as safe or unsafe as the email inside it. An EML file you did not expect could contain phishing links or a malicious attachment, just like any other email.
- Check who sent it and whether you expected it.
- Do not click links or open attachments you do not trust.
- Keep your operating system and security software up to date.
- Be cautious about uploading private messages to online viewers.
Frequently Asked Questions
What program opens EML files? Outlook, Apple Mail, and Thunderbird are common choices. Many other email clients also support the format.
Can I open an EML file without Outlook? Yes. Use Apple Mail on a Mac, Thunderbird, another email client, an online viewer (with privacy caution), or a text editor for the raw content.
Can Chrome open an EML file? Not as a formatted email in most cases. Use an email program or convert the message to PDF or HTML first.
Is there a free EML viewer? Yes. Thunderbird is free, Apple Mail is included with macOS, and various online viewers are free but involve uploading your file.
Can I open an EML file in Gmail? Not directly through the standard Gmail interface. You can attach an EML file to a message, but that does not import its contents. Use an email client to read it or to move the message into a Gmail account.
How do I open an EML file in Windows 11? Right-click the file, choose Open with, and select Outlook or another email app. If none appears, install one or set the default for .eml.
How do I convert an EML file to PDF? Open it in an email program and print the message to PDF. Check the result, and keep the original if attachments or headers matter.
Is an EML file editable? Technically yes, since it is mostly text, but editing it can corrupt it and changes the evidentiary value of the original. Make edits to a copy only.
Why is my EML file not opening? Usually there is no compatible app, the default app is wrong, or the file is damaged. See the troubleshooting table above.
Is it safe to open an EML file? It depends on the email inside. Verify the sender and avoid suspicious links and attachments.
When You Have More Than a Few EML Files
Opening a single EML file is straightforward, but handling hundreds of messages or moving them to another email platform requires more planning. During a migration to Microsoft 365 or Google Workspace, you need to consider email folders, attachments, timestamps, and message integrity to avoid losing important data.
If you need to move multiple emails or an entire mailbox, explore SkyMigrate’s email migration services to learn how to approach the process with less manual effort. Before migrating, test a small batch of emails, verify the results, and keep your original EML files until you have confirmed that everything has transferred correctly.
