Sysinfo OST to PST Converter Tool

High-performance software to perform multiple conversions with zero data disruption

  (Average Rating 4.9 Based on 1762 rating)
  • Allows users to save OST to PST without installing the Microsoft Outlook application.
  • Effortlessly convert OST file data (email, journals, notes, contacts, and tasks) into PST format.
  • Smoothly convert a single or multiple OST files simultaneously while maintaining data integrity.
  • Offers various advanced features, such as a preview feature, a date filter and others.
  • The capability to convert OST files of different Outlook versions on all Windows OS versions.

Sysinfo OST to PST Converter Fully Secured Download Version.

1M+ Downloads
190+ Countries Worldwide
15+ Years Experience

Benefits of the Best OST to PST Converter Tool

Explore the significant features of the OST to PST Converter to simplify email management.

When to Use the Best OST Converter Wizard?

Learn the scenarios where using the Microsoft OST to PST converter is a prominent choice for users.

View and Convert Orphaned OST File

Transfer G Suite Data in Bulk

Viewing or converting OST files without Outlook can be challenging. However, the Sysinfo OST to PST Converter simplifies this process by allowing users to preview and convert OST file data without requiring the Outlook application. This software efficiently converts orphaned and inaccessible OST files.

Simplify the OST to PST Conversion

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This advanced tool offers various incredible features to simplify the process. It allows selective email conversion, creates separate folders for attachments, and much more. Throughout the entire process, it maintains 100% data integrity and preserves folder hierarchy.

Ensure Safe and Secure Conversion

Dignify your Gmail Data Security

Manual OST to PST conversion methods can be risky, time‑consuming, and prone to data corruption. The Sysinfo OST to PST Converter eliminates these risks by offering an automated, fast, and secure process. It keeps the original folder structure intact and delivers a 100% accurate outcome.

Noteworthy Features of Sysinfo OST to PST File Converter

Detailed Features of the offline OST to PST Converter to convert OST files to PST with ease.

Support Various File Format Conversion

Support Various File Format Conversion

Use the Microsoft OST to PST Converter to save your OST files into different file formats, including documents, images, and videos. It allows you to convert OST to vCard , PST, MBOX, EML, EMLX, MSG, PDF, Thunderbird, CSV, GIF, JPG, TIFF, HTML, MHTML, PNG, DOC, DOCX, DOCM, and ICS format efficiently and securely.

Export OST Files to Different Email Clients

Export OST Files to Different Email Clients

This is the best OST to PST conversion tool that enables users to move their OST files into various cloud-based and web-based email clients easily. You can import OST files into Office 365 , Gmail, G Suite, Yahoo Mail, AOL, Hotmail, IMAP, Zoho Mail, Yandex Mail, and iCloud. It ensures the process finishes with zero risk.

Save All the OST File Data

Save All the OST File Data

With this user-friendly OST to PST Converter, users can easily convert OST file data, including emails, contacts, calendars, tasks, notes, and journals. This tool is useful for converting a few or multiple OST files at once with no data damage or loss.

Open and Read OST File Content

Open and Read OST File Content

This wizard allows users to preview OST files, including email body, subject, date, from, total message count, and attachments, before OST conversion. By using this utility, users can also check the folders from the tree to convert selective folders.

Maintains the Folder Hierarchy

Maintains the Folder Hierarchy

Use this free OST to PST Converter to convert your OST files into multiple file formats or email clients. This software enables users to export emails without worrying about file size and count, as it maintains the folder hierarchy till the process ends successfully.

Use Advanced Mail Filter

Use Advanced Mail Filter

This software is equipped with various extraordinary features to ease or simplify the process, such as a date mail filter. This feature lets users convert desired date range emails by simply defining the Start Date & End Date, and the action will be performed accordingly.

Same Source & Destination folder Feature

Same Source & Destination folder Feature

This reliable software offers an advanced Same in the Same folder option to backup the resultant file and the source file to the same location. By selecting this option, the software will save the newly converted file at the same path. In other words, the source & destination folders are the same.

Manage Email Attachments

Manage Email Attachments

Using the SysInfo OST to PST File Converter Tool, users can backup or move emails with or without attachments (by default, it converts emails with attachments). You can also choose to save attachments in a separate folder instead of excluding them. The process remains fast and error-free.

Manage Duplicate Items

Manage Duplicate Items

This software helps in excluding duplicates from emails, contacts, and calendars. In mail, it removes duplicates based on To, From, Subject, BCC & Body. In contacts, it deletes identical contacts based on Title, Mobile Number, Email Address & Full Name. In Calendars, it eliminates similar calendar items based on Subject, Start-Date, End-Date & Recipient.

Desired Folder Name Location

Desired Folder Name Location

Sysinfo offline OST to PST Converter offers two options to assign the desired name: Naming Convention and Custom Folder Name. In the Naming Convention, you can set the name according to formats like Subject_Date, Date_Subject, etc. Otherwise, tick Custom Folder Name to enter the required name. You can also set the path for the output file.

Splitting Large Output PST Files

Splitting Large Output PST Files

This versatile OST to PST Converter software helps users convert their OST files into PST format easily. If the resultant PST file is large, you can enable split Resultant PST to break down large output PST files into smaller ones with the desired size.

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Compatibility of OST Converter

This best OST to PST Converter Tool is designed to consider all users. It allows users to convert OST files created by different Outlook versions, including Outlook 2019, 2016, and other versions, easily. Additionally, you can use this tool on all versions of Windows OS.

Software Specifications

Follow the technical requirements and specifications of the SysInfo OST to PST Converter Tool for smooth operation.

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About Product
Version: 24.08
Size: 174 MB
Release Date: October 2025
Language Supported: English
Edition: Home, Administrator, Technician, and Enterprise
  
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System Requirement
Processor: Intel® Core™2 Duo E4600 Processor 2.40GHz
RAM: 8 GB (16 GB Recommended)
Hard Drive: 512 MB
Support Outlook Versions: Office 365, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97.
Supported Windows: 11, 10, 8.1, 8, 7, 2008, 2012 (32 & 64 Bit), and other Windows versions.
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Demo Version
The free version of the OST to PST Converter Tool lets users explore all features and functionalities of the software. It allows conversion of up to 50 emails per folder at no cost. To convert an unlimited number of emails, upgrade to the premium version for full, unrestricted mailbox conversion.
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Additional Information

Quick Tutorial for Microsoft OST to PST Converter

Follow these simple steps to convert OST to PST files into various formats or export to clients with ease.

Awards and Reviews

SysInfo's Award-Winning Software Recognized by Experts- Highly Rated in the Best Category

Google
  4.2/5
Trustpilot
  4.6/5
capterra
  4.7/5

SysInfo OST to PST Converter Demo and Full Version Comparison

Compare the features available in the free and paid versions of the tool for efficiency.

Product Features Free Version Full Version
Convert OST to DOC, PST, PDF, MSG, MBOX, etc 50 Emails Per Folder All
Export OST to Gmail, Office 365, AOL, iCloud, Yahoo, and others 50 Emails per Folder All
Convert OST Files Without Outlook
Handle Bulk Conversion
Read OST Files Before Conversion
Eliminate Identical Mails
Save Emails Without Attachments
Save Attachments in a Separate Folder
Divide Large Output PST Files
Converting Attachments to PDF
24*7 Tech Support & 100% Secure
Money-Back Guarantee

Why Choose SysInfo for Data Conversion?

SysInfo is a trusted partner providing powerful, future-ready data migration and management solutions. The platform offers strong multi-format conversion, bulk processing, and seamless processing across cloud and email platforms, all while ensuring data integrity, security, compliance (GDPR, ISO/IEC 27001), and superior performance. The platform's intuitive interfaces and robust filtering allow organizations to simplify even the most complex data problems while enabling sustainable growth and reliable results in any digital environment.

For any further queries, concerns, or to learn more about us, reach out to our Chat Support 24*7!

Frequently Asked Questions

Ans: To export OST files into different saving formats, follow the given steps carefully:

  • Install and Run Sysinfo OST File to PST Converter Software.
  • Select Single File(s) or Select Folder to add OST files. Click Next.
  • Choose the items from the tree structure to convert and press Next.
  • Pick PST from the Saves/Backup/Migrate As list.
  • Check the built-in features according to your needs.
  • Tap Convert to start the migration of OST into PST format.

Ans: Yes. You can convert or save OST files into PST or other formats without MS Outlook.

Ans: This utility enables users to export OST files into 10+ file formats, including PST, MBOX, MSG, DOC, EML, HTML, PDF, etc.

Ans: Yes, you can save your OST files into Gmail and other email clients like Office 365, Yahoo, AOL, iCloud, etc, using a few simple steps.

Ans: Yes, the Sysinfo OST to PST Converter Tool supports the conversion of large OST files. You can convert single or multiple OST files at once without any size limitations.

Ans: You can convert emails, contacts, calendars, tasks, notes, journals, and more.

Ans: Yes, the OST to PST Converter tool is compatible with all versions of Microsoft Outlook, including Outlook 2019, 2016, and earlier versions, without any issues.

Ans: Yes, you can open and preview OST files before starting the conversion process with the best OST to PST Converter tool. It allows you to view emails along with their attachments.

Ans: This OST to PST Converter tool is designed to convert your OST files on Windows 8 and other versions, including both the latest and earlier versions, with high efficiency and without data loss.

Ans: Admin consent is only required when the application asks for permissions that go beyond a single user’s data, for example, organization-wide or multiple user access. In such cases, only a Microsoft 365 administrator can approve the login for security reasons.

Ans: Yes, enabling user sign-in is mandatory for Modern Authentication. This is because Modern Authentication needs the user account to have sign-in access in order to generate an authentication token. If sign-in is disabled for the account, the tool or application won’t be able to connect or access the user’s data.

To avoid login issues, make sure that sign-in is enabled for all accounts before using Modern Authentication.

Our Clients Review

Read what our clients say about their experience with our Outlook OST to PST Converter.