Read & convert
Open and read .eml, .emlx, Outlook .msg, and .mbox email files right in your browser. See the formatted message, headers, and attachments — with remote images and trackers blocked by default. Nothing is uploaded.
There is no upload endpoint — your files are processed in this browser tab. Open your network tab and check. See how it stays private.
How to open an EML file
- Add the email. Drop an .eml, .emlx, .msg, or .mbox file onto the tool, or browse for it.
- Read the message. See the formatted body, subject, sender, date, and recipients laid out like a mail client.
- Check headers & attachments. Expand the full headers or the attachment list to inspect what came with the message.
- Open the next one. For an .mbox mailbox, pick any message from the list to read it.
An .eml or .msg file is just a saved email, but opening one usually means firing up a heavy desktop client or trusting an online viewer that uploads your message first. This reader skips both: point it at the file and the message renders in the tab, so a forwarded receipt, an exported thread, or evidence attached to a ticket stays on your machine.
It handles the formats people actually run into — .eml from most mail clients, .emlx from Apple Mail, Outlook .msg, and full .mbox mailboxes from Gmail Takeout or Thunderbird. You get the formatted body plus the subject, sender, recipients, and date, and you can expand the raw headers when you need to see exactly how a message was addressed and routed.
When you need more than a read: convert the message to a shareable PDF with Email to PDF, pull files out of it with the Attachment extractor (including stubborn winmail.dat), or trace its delivery path with the Header analyzer.
Frequently asked questions
How do I open an EML file without Outlook?
Drop the .eml file onto this page. It renders the message — body, headers, and attachments — in your browser, so you don't need Outlook, Thunderbird, or any desktop app.
Can I open an Outlook .msg file?
Yes. The viewer reads Outlook .msg files as well as .eml and .emlx, showing the message and letting you save its attachments — a quick way to read a .msg file without Outlook installed.
What is an .emlx file and can I open it?
EMLX is the per-message format Apple Mail uses on macOS. Drop an .emlx file here and it opens the same way as a standard .eml message.
Can I open an MBOX mailbox?
Yes. Load an .mbox export (from Gmail Takeout, Thunderbird, or Apple Mail) and the tool lists every message inside so you can read them one by one.
Is this email viewer really free?
Yes — it's a free EML viewer with no account, no watermark, and no upload. The whole thing runs as a static page in your browser tab.
Are remote images and trackers blocked?
By default, yes. Remote images and tracking pixels are not loaded when a message opens, so viewing an email can't signal the sender that you read it.
Related tools
- Email to PDFConvert .eml, .msg, and .mbox emails into clean, selectable-text PDFs — one at a time or in a batch to a ZIP. The header block and message body are laid out for you, entirely in your browser with no upload.
- Attachment ExtractorPull every attachment out of .eml, .msg, and .mbox emails, and decode stubborn winmail.dat (TNEF) files that other apps can't open. Preview, save individually, or download them all as a ZIP — all on your device.
- Header AnalyzerPaste raw headers or drop an .eml file to trace the delivery path hop by hop, read SPF, DKIM, and DMARC results, spot spoofed domains, and detect tracking pixels — a private alternative to online header tools, run in your browser.
- MergeOne document, your order