OST to PST Converter
Email Reader & Mailbox Viewer
Only for Mac
Free · In‑App Purchases
Mac
Read your mailbox before converting. Preview messages and attachments, create a PST copy on your device, and check it with optional verification.
Open Outlook mailbox files, read the messages inside, and create a PST copy on your device. OST to PST Converter works with OST and PST files without requiring Outlook to be installed.
PREVIEW BEFORE YOU CONVERT
Browse the mailbox's folder hierarchy and item counts. Find a folder by name, open its message preview, and inspect the contents before creating your PST.
READ EMAIL AND PREVIEW ATTACHMENTS
View message subjects, senders, recipients, dates, and available plain-text or HTML message bodies. Move between messages and use Quick Look to preview supported file attachments. Remote content in email bodies is blocked.
CREATE A PST COPY
Convert the mailbox into a new PST file while keeping the source file unchanged. Follow progress as the file is written and cancel a conversion when needed.
VERIFY THE RESULT
Enable optional verification to compare the converted PST with your source mailbox. Review reported differences in folders, items, and recipient or attachment counts before using the exported file.
PROCESS YOUR MAILBOX ON YOUR DEVICE
Mailbox reading and conversion run locally. The app does not upload mailbox contents to a conversion server and does not require an account.
ON YOUR MAC
Open a mailbox with Open File or drag a file onto the start screen. Preview folders and messages, save supported file attachments, and choose a destination for the converted PST. Reveal the completed file in Finder.
OST to PST Converter is an independent utility and is not affiliated with or endorsed by Microsoft. Outlook is a trademark of Microsoft.
For support or feedback, contact us at admin@yenpi.com.
Terms of Use:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 延平 陈, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 延平 陈
- Size
- 2.4 MB
- Category
- Productivity
- Compatibility
Requires macOS 14.0 or later.
- Mac
Requires macOS 14.0 or later.
- Mac
- Languages
English and 18 more
- English, Arabic, Czech, Dutch, French, German, Hungarian, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Weekly $7.99
- Pro Lifetime Access $44.99
- Copyright
- © 2026 OST to PST
