How Do I Open an EML File: Windows, Mac, iPhone and No-Software Methods

How do I open an EML file? Double-click it, and it opens in your default email program: Outlook or Thunderbird on Windows, Apple Mail on a Mac. If you have no email program, or you are on a phone or a Chromebook, drop the file into our free EML to PDF converter. It turns the email into a PDF you can open anywhere, with the sender, date and attachments intact.

We open saved emails every week at LeadCanal. Clients forward us bounce reports, supplier quotes and contact lists as .eml files, and not everyone on our team uses the same mail app. This guide covers every method we use, for every device, plus what to do when the file refuses to open.

What is an EML file?

An EML file is a single email saved as plain text. It follows the internet message standard, RFC 5322, with MIME encoding for formatting, images and attachments. That is why almost every email program can read it, unlike formats that belong to one vendor.

Every .eml file has two parts:

• Headers: From, To, Cc, Subject, Date, plus technical lines such as Received and Message-ID that show the route the email took.
• Body: the message as plain text, HTML or both, followed by any attachments encoded as text (usually base64).

You usually get an .eml file when someone forwards an email “as attachment”, when you download a message from Gmail (More, then Download message), or when you drag an email out of Thunderbird or Apple Mail onto your desktop.

How is EML different from MSG, EMLX and PST?

If your file ends in .msg, the methods below will not work on it. The rest of this guide is about .eml files only.

How do I open an EML file without Outlook or any email program?

The quickest no-install method is to turn the email into a PDF. A PDF opens on every phone, tablet and computer, and it keeps the header block that a text editor shows as clutter. This is Method 1 because it works the same everywhere.

1. Go to the LeadCanal EML to PDF tool in any modern browser.
2. Click Choose EML files, or drag one or more .eml files onto the box. Each file can be up to 60 MB.
3. Open Options if you need them: page size (A4 or US Letter), whether to load images hosted online, and whether to extract attachments.
4. Click Convert to PDF. Each email becomes its own PDF, named after its subject.
5. Download the PDF, plus any attachments listed under it. With several emails, use Download all to get one ZIP.

Each PDF starts with the subject, then From, To, Cc and the date, then a list of attachments with their sizes. Inline images that travel inside the email are embedded. If you want selectable text and every remote image, a single conversion also offers a print view, where you choose Save as PDF.

We cover more conversion detail, including batches and legal archiving, in our guide on how to convert EML to PDF.

How to open an EML file on Windows

Windows does not ship with a program that reads .eml files on its own any more, since the old Mail app was retired. Besides the browser converter above, you have three practical options.

Classic Outlook or the new Outlook

1. Right-click the .eml file and choose Open with.
2. Pick Outlook. To make it the default, tick “Always use this app” (or choose Always).
3. The email opens in a message window, where you can read it, save attachments, reply or forward.

Classic Outlook (2010 and later) opens .eml files directly. Microsoft has also added .eml support to the new Outlook for Windows, though older builds may not offer it. If Outlook is not listed in Open with, it is not installed or not set up with an account.

Mozilla Thunderbird (free)

Thunderbird is free and opens .eml files even without an email account. Install it, then either double-click the file or use File, then Open, then Saved Message. It shows the full email with attachments you can save.

Notepad, or renaming to .mht

Open the file in Notepad to read the raw message. The headers and plain-text body are readable, but HTML formatting and attachments appear as code. An older trick is to rename a copy from .eml to .mht and open it in Microsoft Edge, which often shows the formatted email. It is hit and miss, so always rename a copy, never the original.

How to open an EML file on a Mac

On macOS, Apple Mail opens .eml files by default, even if you have never added an account. Double-click the file and it opens in its own message window.

• Outlook for Mac or Thunderbird instead: right-click the file, choose Get Info, set Open with to your app and click Change All.
• No mail app: use the browser converter in Safari or Chrome, which needs no setup.
• Quick look: select the file in Finder and press Space. Quick Look often shows a readable preview, though not every attachment.

How to open an EML file on iPhone, iPad or Android

Phones are where most people get stuck, because the .eml usually arrives as an attachment or a download.

• iPhone and iPad: if the .eml is attached to an email in the Mail app, tap it and Mail usually shows it as a message. If it is saved in the Files app, open the EML converter in Safari, choose the file from Files and open the PDF it creates.
• Android: the Gmail and Outlook apps rarely open a saved .eml file. Open the converter in Chrome, pick the file from Downloads and read the PDF in any PDF viewer.

Both routes keep the file on the phone. You do not need to install an “EML reader” app from the store.

How to open an EML file in Gmail, Chrome or online

Gmail has no import button for a single .eml file. Two things work:

1. Gmail preview: email the .eml file to yourself as an attachment. Gmail can usually preview it, and in our experience forwarded-as-attachment emails display inline.
2. Browser converter: open the converter in Chrome, Edge, Firefox or Safari. It reads the file inside the browser tab, so it works on Windows, Mac, Linux and ChromeOS alike.

Be careful with online “EML viewers” that ask you to upload the file. An email can contain contracts, invoices, passwords or personal data, and an upload puts a copy on someone else’s server.

Which method should you use?

A worked example: opening a client’s forwarded emails

A typical case for us: a client sends six .eml files, each a reply from a prospect, so we can update their CRM. Half our team is on Windows without Outlook, one person is on a Chromebook.

1. We drop all six files into the free EML converter at once and leave remote images off.
2. We get six PDFs, each named after its subject line, plus the attachments (two signed PDFs and a CSV), all in one ZIP.
3. We read each PDF, then paste the bodies into our email extractor to pull out every address mentioned in the signatures.
4. One PDF is too large for the client’s portal, so we shrink it with the PDF compressor.

Nobody installed anything, and the emails never left our laptops.

Is it safe to open an EML file?

An .eml file is text, so opening it is not dangerous by itself. The risk is in what the email contains, the same as any email in your inbox.

• Attachments: an attached .exe, .js or macro-enabled Office file can still be malware. Only open attachments you expected.
• Links: phishing emails are often passed around as .eml files. Check where a link goes before you click it.
• Tracking images: remote images can tell the sender that you opened the email. Our converter blocks images hosted online by default, so a PDF can be made without that signal.
• Scripts and forms: the converter strips scripts, forms and embedded frames before it builds the PDF.

Privacy matters too. The converter runs entirely in your browser, so the file is never uploaded to LeadCanal or anyone else, and nothing is stored. That is important for emails, which so often carry contracts, bank details or personal conversations. It also checks that a file really is an email before opening it, so a renamed program is refused. If you are unsure who sent a message, a reverse email lookup can show the business behind the address.

Why won’t my EML file open?

Frequently asked questions

How do I open an EML file on Windows 10 or 11?

Right-click the file, choose Open with and pick Outlook or Thunderbird. With neither installed, use a browser-based converter to read it as a PDF.

Can I open an EML file without Outlook?

Yes. Thunderbird, Apple Mail and a browser converter all open .eml files, and Notepad or TextEdit shows the raw text.

What program opens an EML file?

Outlook, Thunderbird and Apple Mail open them directly. Any browser can read one through a client-side converter, and any text editor can show the source.

Can I open an EML file in Gmail?

Not as an import. Email it to yourself as an attachment and Gmail can usually preview it, or convert it to PDF instead.

How do I open an EML file on my iPhone?

Tap it as an attachment in the Mail app. If it is in the Files app, convert it to PDF in Safari and open the PDF.

Do EML files contain attachments?

Yes. Attachments are stored inside the .eml as encoded text. A mail app or a converter that extracts attachments gives them back as normal files.

Can I edit an EML file?

You can change the text in a text editor, but that alters the original record. For evidence or archives, keep the original untouched and work on a copy.

Can I open many EML files at once?

Yes. The converter accepts several files in one go and returns one PDF per email, with a ZIP download for the lot.

Conclusion: key takeaways

The right way to open a saved email depends on your device, but one method works everywhere. When in doubt, try the free EML to PDF converter, or browse the rest of our free file tools.

• An EML file is one email saved in the standard format most mail apps can read.
• On Windows, use Open with and pick Outlook or Thunderbird.
• On a Mac, double-click and Apple Mail opens it.
• On phones and Chromebooks, convert it to PDF in the browser.
• Open attachments and links only from senders you trust.
• Keep the original .eml untouched when it is a record or evidence.

Editorial policy

We write guides about the files we handle in our own work, and we test each method before we publish it. When software changes, such as a mail app gaining or losing .eml support, we update the guide. We do not accept payment to recommend any product named here.

Content transparency

This guide was researched with keyword and search data and checked against official documentation, including the RFC 5322 message standard and vendor help pages. LeadCanal built and offers the free browser converters mentioned. They run on your device and do not upload your files.

About the author

The LeadCanal team builds verified B2B contact lists, enriches CRM data and runs cold email infrastructure every day. We handle CSV lead lists, VCF contacts, PDF reports and forwarded emails for clients, and we built our free file tools to make that work faster and more private.