Open .eml and Outlook .msg files right in your browser - no Outlook, no upload. Read the message with its pictures, save the attachments, check the headers and convert MSG to EML. Whole mailboxes open in the MBOX Viewer and the PST Viewer.
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Opened several emails at once? Switch between them with the chips above the message.
Standard .eml files, Outlook .msg items (emails, meetings, contacts, notes) and Apple Mail .emlx files.
Scripts never run, forms are switched off, remote images and tracking pixels are blocked until you say so.
Preview pictures, PDFs and text, save one file or all of them as a ZIP, and open emails attached inside emails.
SPF, DKIM and DMARC results, every server hop with its delay, and the complete raw headers.
Turn Outlook messages into standard .eml files that Thunderbird, Apple Mail and Gmail understand.
A clean printout with the sender, recipients and date on top - or save it straight to PDF.
UTF-8 and the old character sets (Japanese, Cyrillic, Central European and more) are decoded correctly.
Meeting invites show their time and place, and signed or encrypted emails (S/MIME, PGP) are labelled.
Both hold a single email - the difference is who made them.
An EML file is the open, standard way to save an email (RFC 5322 with MIME). Thunderbird, Apple Mail, Gmail downloads and Outlook can all create one, and it is plain text inside.
A MSG file is Outlook's own format. It is a binary container that stores the email as Outlook properties, and it can also hold a meeting, a contact, a task or a note.
| Format | Holds | Made by | Open it with |
|---|---|---|---|
| .eml | One email, text based (MIME) | Thunderbird, Apple Mail, Outlook, Gmail ("Download message") | This viewer, any mail app |
| .msg | One Outlook item, binary | Microsoft Outlook (drag an email out, or Save As) | This viewer, Outlook for Windows |
| .mbox | Many emails in one text file | Thunderbird, Apple Mail export, Gmail Takeout | MBOX Viewer, Thunderbird |
| .pst / .ost | A whole Outlook mailbox with folders | Microsoft Outlook | PST Viewer, Outlook |
This viewer runs in the browser, so the steps are the same everywhere: open this page and pick the file.
Here is what each system offers on its own, and when the viewer saves you.
A double-click opens .eml and .msg files in Outlook when it is installed. Without Outlook, .msg files have no built-in app, and .eml files may open in a mail app you never set up.
Drop the file here instead - nothing to install, and nothing touches your mail account.
Apple Mail opens .eml files with a double-click. It does not open Outlook .msg files, so those are the classic "I got this from a Windows colleague" problem.
Open them here, then press Convert to .eml if you want to keep them in Apple Mail.
Save the attachment first: press and hold it in Mail, then choose Save to Files. Open this page in Safari, tap the drop area and pick the file from Files.
Download the .eml or .msg attachment, open this page in Chrome, tap the drop area and choose the file from Downloads or Drive.
Every export happens in your browser, from the buttons under the message.
Got an attachment the browser cannot preview? Open it in the matching viewer: Word, Excel, ZIP or contact cards.
Headers are the postmarks of an email.
They show which servers handled it, when, and whether the sender's domain vouched for it.
A "fail" on all three for an email that claims to come from your bank is a strong phishing sign. To see where a sending server is, look up its IP with the IP Location Checker.
The viewer checks every file and names the problem. These are the usual suspects:
More formats? Browse all file viewers.
Drop the .eml file onto this page or click the drop area to browse. The email opens right away with its formatting, pictures and attachments.
It works in Chrome, Edge, Safari and Firefox on Windows, Mac, Chromebooks, iPhone and Android, with nothing to install.
Open it here. The viewer reads the Outlook .msg format directly in your browser: subject, sender, recipients, the HTML or rich text body, inline pictures and every attachment, including emails attached inside the email.
Calendar invites, contacts and notes saved as .msg open too.
Open the .msg file and press Convert to .eml. You get a standard .eml file with the same sender, recipients, date, body and attachments, ready for Thunderbird, Apple Mail, Gmail or any other mail app.
The conversion happens in your browser.
Open the email and press Print / PDF, then choose Save as PDF (or Microsoft Print to PDF) as the printer. The PDF gets the subject, sender, recipients and date on top, followed by the message.
To join several emails into one document, use Merge PDF afterwards.
Pictures stored on the sender's web server are blocked until you click Load remote images, because loading them tells the sender you opened the email. Pictures stored inside the file show straight away.
Tiny tracking pixels are removed and counted.
Nothing is uploaded: the file is read by your own browser and never leaves your device.
The email is shown in a locked frame where scripts cannot run, forms cannot send anything and links open in a new tab, so a suspicious email can be inspected without risk.
Open the email and switch to the Headers tab. You see the SPF, DKIM and DMARC results recorded by the receiving server, every server the email passed through with the delay at each hop, and the complete raw headers.
You can also paste just the headers into the paste box.
The most common reasons are a file that was cut off during download (0 KB or much smaller than expected), a winmail.dat file instead of a real email, or a different file renamed to .eml or .msg.
The viewer checks the file and tells you which case it is, and opens whatever part of a damaged email it can still read.