Available in the Chrome Web Store

MSG Viewer Online
View Outlook email files in your browser

Open MSG files online without installing Microsoft Outlook. Our free Chrome extension reads MSG files locally in your browser — no upload, no server, complete privacy.

Add to Chrome - It's Free See how it works
No upload required
Multiple files at once
Download attachments
Works offline

What is an MSG File?

An MSG file (.msg) is Microsoft Outlook's proprietary format for storing individual email messages. When you save an email from Outlook, it creates an MSG file using the Compound File Binary Format (CFBF) — the same underlying structure used by older Microsoft Office documents.

What MSG files contain

  • Sender, recipients, CC, BCC fields
  • Subject line and timestamps
  • HTML and plain-text email body
  • File attachments (PDFs, images, documents)
  • Embedded images and rich formatting

The problem with MSG files

  • Requires Microsoft Outlook to open natively
  • Not supported on Mac or Linux without workarounds
  • Proprietary binary format — not human-readable
  • Outlook license can be expensive
  • Solution: MSG Viewer opens them for free

MSG files are everywhere in business communication, legal proceedings, and email archives. With our online MSG viewer, you can open any MSG file instantly in Chrome — no Outlook, no desktop software, no cost.

How to View MSG Files Online

Open any Outlook MSG file in 3 simple steps — no Outlook required

1

Add the Extension

Install MSG Viewer from the Chrome Web Store. One click, no registration, installs in seconds.

Add MSG Viewer extension from Chrome Web Store
Import MSG files using the extension popup
2

Import MSG Files

Click the extension icon, then "Import Files" to select your MSG files. Open one file or batch process dozens simultaneously.

3

Read & Download

Your email opens with complete formatting. Read the message, inspect headers, view embedded images, and download all attachments.

View MSG email with full formatting and download attachments
Install MSG Viewer - Free

Why Use an Online MSG Viewer?

Skip the expensive software. Open MSG files right in your browser.

No Outlook Needed

Don't have Microsoft Outlook? No problem. MSG Viewer reads the proprietary MSG format directly, giving you full access to email content without any Microsoft software.

Truly Private

Unlike web-based MSG viewers that upload your files to a server, MSG Viewer processes everything locally. Your sensitive emails never leave your machine.

Any Operating System

MSG files are a Windows/Outlook format, but our viewer works on Mac, Linux, and Chrome OS too. If you have Chrome, you can view MSG files.

Lightning Fast

MSG files open instantly. No waiting for uploads, no processing delays. Click import, see your email. Even large MSG files with multiple attachments render in seconds.

Batch Processing

Need to review dozens of MSG files? Import them all at once. Each email opens in its own view, making it easy to browse through large collections.

Free Forever

No subscriptions, no premium features, no limits. MSG Viewer is and will always be completely free. All features available to everyone.

Open MSG Files from Anywhere

View MSG files from your computer or directly from cloud services

💻

Local Files

Import MSG files from your computer via the extension popup

☁️

Google Drive & Dropbox

Click on MSG files in cloud storage — they open automatically

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Notion & More

View MSG attachments in Notion and other web apps without downloading

MSG Viewer Online FAQ

Common questions about viewing MSG files online

What is an MSG file and why can't I open it?
MSG is Microsoft Outlook's proprietary email format. If you don't have Outlook installed (or use a Mac/Linux/Chromebook), your system can't open these files natively. MSG Viewer solves this by reading the MSG format directly in Chrome, giving you access to the full email content without Outlook.

How is this different from other online MSG viewers?
Most online MSG viewers require you to upload your email file to their servers. This means your private emails pass through a third party. MSG Viewer is fundamentally different: it runs entirely in your browser. Your files never leave your computer, making it the most private MSG viewer available.

Can I view MSG files on a Mac?
Yes. MSG files are an Outlook/Windows format, but MSG Viewer works on any platform with Chrome — including macOS, Linux, and Chrome OS. No need to install Outlook for Mac or any other software.

Can I download attachments from MSG files?
Yes. MSG Viewer displays all attachments included in the MSG file and lets you download each one individually with its original filename. This includes PDFs, images, Office documents, and any other file type.

Does the MSG viewer also support EML files?
Yes. MSG Viewer supports both MSG and EML file formats. Whether you receive Outlook emails (MSG) or emails from Thunderbird, Apple Mail, and others (EML), you can open them all with the same extension.

Does it work without an internet connection?
Yes. Once installed, MSG Viewer works entirely offline. No internet connection is needed to view MSG files, download attachments, or use any feature. Ideal for air-gapped environments or when traveling.

View MSG Files Online Now

Free forever. No Outlook needed. No files uploaded. Install in seconds.

Add to Chrome - It's Free

Also opens EML files · Works on Windows, Mac, Linux, Chrome OS