Convert MSG to OST Free — Online & Instant

Convert MSG to OST — Free Online

Fast, secure, no software needed.

📁 Drag & drop your file here

or click to browse • Max 100MB

✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install

How to Convert MSG to OST

Converting .msg files to .ost is fast and simple with OpenAnyFile. MSG is a email format: MSG is Microsoft Outlook email message format. OST is a email format: OST is an offline Outlook data file for Exchange accounts.

Upload your .msg file to OpenAnyFile
Select OST (.ost) as the target format
Click "Convert" and wait for processing
Download your converted .ost file

Why Convert MSG to OST?

There are several reasons to convert from .msg to .ost:

Compatibility: .ost may be more widely supported by software and devices
File size: Converting between formats can reduce file size for easier sharing
Editing: OST may offer better editing capabilities for your workflow
Sharing: Recipients may prefer .ost files for their daily use

About MSG Format

MSG is Microsoft Outlook email message format. Category: Email. Extension: .msg. Created by: Microsoft.

About OST Format

OST is an offline Outlook data file for Exchange accounts. Category: Email. Extension: .ost. Created by: Microsoft.

Frequently Asked Questions

How do I convert .msg to .ost?

Upload your .msg file to OpenAnyFile, select OST as the target, and download the converted file.

Is MSG to OST conversion free?

OpenAnyFile offers free file analysis. Conversion may require a one-time payment depending on the file.

Will I lose quality converting .msg to .ost?

OpenAnyFile preserves maximum quality during conversion. Some format-specific features may not transfer between different file types.

Can I convert .ost back to .msg?

Yes, you can convert .ost to .msg using OpenAnyFile as well.