Best OST converter software capable of converting OST to PST format with complete data integrity. This OST to PST converter is verified by Microsoft MVPs and recommended as reliable for the conversion of OST to PST file format.
⭐⭐⭐⭐⭐ "Saved me hours of work! I had over 38GB of old employee OST files that I needed to open in Classic Outlook 2016. This tool allows converting huge OST to PST file perfectly without losing a single attachment." – Sarah M., IT Consultant, USA
OST to PST Converter Tool - Awards
“FreeViewer OST to PST converter Software got 4 star rating from CNET for it wonderful performance and simple user interface. Free download demo version software.”
“BrotherSoft gave 5 star rating to this OST converter software with complete support to convert orphaned OST files to PST file format.”
“Filehippo states OST to PST converter tool by FreeViewer as safe and secure tool in the virus scanning technology provided by Avira.”
“Soft32 rate this OST to PST converter software with 5 star for its effectiveness. Free demo version available to check all the features.”
“OST to PST converter tool is the highly suggested software among various other tools for its best performance and 5 star rating by its users.”
“SoftPedia give 100% clean award to OST conversion software for delivering Spyware & virus-free to convert OST to PST on all Windows OS installed systems.”
An OST (Offline Storage Table) file is stored locally on a user's computer and works in synchronization with Exchange Server and IMAP accounts. However, it's tightly linked to the original Outlook profile and cannot be opened independently if the profile or server connection is broken. But at the same time PST file is accessible without any restriction. This forces use to export the data from OST file and save into PST format.
Specific Scenarios That Trigger Conversion
Here FreeViewer OST to PST converter become quite useful in all above scenarios. It is a all-in-one software to make OST file portable, importable, accessible.
OST to PST Converter Tool - Key Features
Convert Complete Data from OST File
OST converter software is capable enough to convert OST to PST format with all data like emails, contacts, calendars, tasks, journals, etc. User can verify the content of source OST file with the exported PST file.
Save Scanned OST File Status
OST to PST converter software scans the browsed OST file and gives users the option to save the scanned data. This feature helps save time—when the same OST file is added again in the future, the software instantly loads the OST file data into the software panel without re-scanning.
Export Selective Data from OST Files
This OST to PST converter software allows users to selectively convert emails and other mailbox items from an OST file. Each email has a checkbox next to it, so users can simply select the items they want to convert. The software will then export only the selected data, ensuring that only the required information is converted from OST to PST format.
Provides Date Filter Option
Using Date Filter option users can convert data from a specific time period from the OST file to PST format. This feature makes the software more efficient and saves valuable time. Once the conversion is done, the resulting PST file is well-organized and doesn't require any extra management. Users can also apply multiple date range filters at the same time for more precise OST file conversion.
Convert Corrupt OST Files
If OST file is corrupted then it cannot be accessed directly. In such cases, this software scans the damaged OST file and then converts it into PST format. Resulting PST file is completely free from corruption and can be accessed without any issues. This feature can also be tested using the free demo version of this OST to PST converter software.
Provides Different Preview Modes
Before converting an OST file to PST format the software allows users to preview the complete data within software UI. Software interface offers 7 different preview modes, including Normal Mail View, Hex, Properties, Message Header, MIME, RTF, and Attachments. Users can select any mode, and the corresponding data will be displayed for detailed analysis.
Sort Emails in Software Panel
OST to PST converter software offers a unique feature that allows users to sort emails before conversion. In preview panel, users can click on columns like From, Subject, To, Sent Date & Time, Received Date & Time, or Size to sort the emails accordingly. This feature is especially useful when users need to analyze or review specific data before performing OST file conversion.
Maintains Folder Hierarchy
OST to PST converter is an excellent tool that preserves original folder structure of source OST file during conversion. Resulting PST file maintains same folder hierarchy. Making it easy for users to navigate and retrieve data after OST conversion. This ensures a smooth and organized experience without any confusion or data loss.
Maintains Data Integrity
OST to PST converter software ensures that all email metadata and data integrity are fully preserved during conversion process. It maintains original email properties—such as To, From, Subject, Date, and other attributes—so output PST file retains exact structure and details of original emails.
Available for Windows & Mac OS
FreeViewer offers separate OST to PST converter software versions for both Windows and Mac operating systems. Users can download appropriate version based on their OS. Software is compatible with all major versions of Windows and macOS, and users can test OS compatibility by using the free demo version before purchasing.
Option to Search OST File
If a user doesn’t know the exact location of OST file on their system. OST to PST converter software provides a built-in search feature. By using it, software automatically scans system to find all available OST files and displays them. User can then select the desired OST file from the list and proceed with scanning and conversion.
Create Required Size PST File
If OST file is too large, this OST to PST converter software allows users to specify the size for output PST file. During conversion process software will automatically split PST file according to defined size limit. To use this feature, users just need to open Advanced Settings window and set the desired size.
Select Category and Convert OST
OST to PST converter software provides a Category Selection feature that allows users to choose specific types of data for conversion. Users can simply check checkboxes next to categories they want to export—such as Emails, Contacts, Calendars, Tasks, Journals, or Notes. Software will then convert only selected data, making process faster and more focused.
Save Output PST at Desired Location
Once conversion process is complete user can choose a specific location to save output PST file. Software will then save PST file to that selected path. If no location is provided, OST to PST converter tool will automatically create a new folder on desktop and save PST file there by default.
Free Download Tool to Convert Offline OST Files to PST File Format
Processor
Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz 2.39GHz
Memory & Storage
4 GB of RAM (4 GB is recommended) | 100 MB of free hard disk space required
Deployment Prerequisites
Supported Editions
FAQs
Q: Is Anti-Virus blocking the export process?
Disable Anti-Virus temporarily or whitelist the software in your settings for proper functionality.
Q: Unable to create output in destination?
Avoid using NAS, SAN, or Network drives. Ensure the source file is on the local migration machine to perform successful migration.
Software Download
Release v11.0 | File Size: 81.16 MB
Trial Limitations
OST to PST converter free demo version will generate preview & export only 25 Items per Folder.
For Win:
For Mac:
Electronic Delivery
The delivery of product is automated. You will receive an email containing both the link to download and the activation key within a few minutes.
OST to PST Converter Tool - Feature Comparison
|
Features |
Free Version |
Full Version |
|---|---|---|
| Add OST File of Any Size |
|
|
| Quick and Deep Scan Option |
|
|
| View All Emails with Attachments |
|
|
| Support Outlook 2024, 2021, 2019, 2016, 2013, 2010, 2007, 2003, etc. |
|
|
| Create Multiple PST File for A Large OST File |
|
|
| Convert OST File to PST without Outlook | 25 Items/Folders | All Items |
| Convert Orphaned OST to PST | 25 Items/Folders | All Items |
| Convert Offline OST to PST | 25 Items/Folders | All Items |
| Cost | Free | $49 |
Frequently Asked Questions
What Customers Are Saying