Open Outlook |Without Outlook
A fast, lightweight Windows app that opens any .msg file in seconds — no Microsoft 365 subscription, no bloat, no fuss.
Stuck With MSG Files You Can't Open?
You've hit one of these walls before. OpenMSG removes all of them. See common use cases →
Double-clicking does nothing
Windows has no built-in handler for .msg files. You're stuck staring at an error — even when the email contains something urgent.
Outlook is overkill — and expensive
A Microsoft 365 subscription costs $10–$22/month per user. That's an unreasonable price just to open one file format.
Reviewing hundreds of files should be fast
Legal teams, IT admins, and compliance officers work under deadlines. Slow, clunky tools cost real time and real money.
Everything You Need. Nothing You Don't.
Purpose-built for one thing: opening MSG files beautifully. See the full feature list →
Lightning Fast
Open any MSG file in milliseconds, even large ones.
No Outlook Required
Fully standalone — works with zero Microsoft Office installed.
Full Email Detail
View sender, recipients, subject, date, HTML body, and embedded images exactly as sent.
View Attachments
See attachment names, sizes, and types listed clearly alongside each email.
Built for Windows 11
Native Fluent Design. Feels like it belongs on your system.
Privacy-First Design
Files are processed entirely on your device — no email content is ever uploaded or shared with any server.
Up and Running in 60 Seconds
Download from the Microsoft Store
One click
Open any .msg file
Double-click or drag-and-drop
Read and review the full email
Instantly
Why OpenMSG Wins
| Feature | OpenMSG | Microsoft Outlook | Other Viewers |
|---|---|---|---|
| Cost | Free for personal use | Microsoft 365 required | Free–$30 |
| Outlook Required | Not needed | Required | Usually |
| Speed | Instant | Slow startup | Varies |
| File Processing | Local only | Cloud Sync | Varies |
| Windows 11 Native | Yes | No | No |
| App Size | ~15 MB | 500+ MB | 50–200 MB |
Trusted by users worldwide
Ratings from the Microsoft Store
4.9 / 5
Microsoft Store rating
0+
Monthly active users
MSG files open without Outlook
"I spent days and days each time open a MSG file with "Notepad", it was a nightmare. And today I discover that I can open with a "OpenMSG", perfect!"
Perfectly simple, absolutely no fluff!
"It displays the email contents fully formatted (with confirmation before loading external content) and supports downloading the attachments. It does literally nothing else, and I love it. Near perfection for a simple UX (I kinda wish I had the option to print, but I respect the decision to consider that out of scope for this tool). Keep it gloriously simple!"
Great fast app
"Extremely smooth and fast in opening and viewing .msg files and attachments. Very happy!"
Common Questions
Stop Being Blocked by MSG Files
Free for personal use from the Microsoft Store. No account, no credit card, no subscription.
Compatible with Windows 11 and Windows 10 (19041.0 or higher) · Need help?