Online MSG Viewer
Open your MSG files instantly, right here in your browser.
100% Private: Your files are processed locally and never uploaded to any server.
Drop your .msg file here
or click to browse from your computer
How to Open MSG Files Online
Opening an Outlook .msg file on your computer usually requires Microsoft Outlook or an expensive third-party application. With our free Online MSG Viewer, you can open, read, and explore your email messages instantly right from your web browser, regardless of whether you're using Windows, Mac, or Linux.
Is it private?
Yes. When you drag and drop a file into the viewer above, the file is processed locally using JavaScript running entirely inside your browser. Your emails and attachments are not uploaded to any server.
What about Attachments?
The online viewer displays attachment names, sizes, and types included in the email. For the fastest experience when opening lots of MSG files, try the native OpenMSG Viewer App for Windows.
What is an MSG file?
An MSG file is a proprietary file format developed by Microsoft for Outlook. It contains a single email message, appointment, or contact, along with all its metadata (headers, sender, recipients, dates), HTML or plain-text body, and any embedded attachments. Our online viewer decodes this proprietary format on-the-fly.