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Free OST to PST Converter


(Average Rating 4.8 Based on 224 Reviews)

Convert Exchange, IMAP, and Orphaned OST file into PST format for Outlook with complete items. It also recovers and converts corrupted, damaged, and highly-encrypted OST files. It converts OST items for Microsoft Outlook, Thunderbird, Gmail, Office 365, etc.


OST to PST Converter
OST to PST Converter Box

Tool to Convert OST to PST for Microsoft Outlook.

  • Multiple Conversion: Convert OST to PST, MBOX, EML, EMLX, MSG, HTML, etc.
  • Complete Conversion: Contacts, Calendars, Notes, Tasks, Journals, etc.
  • File Recovery: Recover Corrupted, Encrypted, and Password-protected files.
  • Move to Mail Servers: Import OST to Gmail, Office 365 and Live Exchange Server.
  • 3 in 1 Option: Supports to convert OST, PST, and NST files [3 in 1].
  • Embedded Objects: Converts embedded objects like Excel Worksheet, MS Word, etc.
  • Batch Conversion: Supports batch conversion for quick results.
  • Split OST File: Split resultant files as per Date, Size, and Folder.
  • Contacts: Export OST Contacts to VCF file format.
  • Calendar: Export OST Calendar to ICS file format.
  • Supports all Files: Supports both ANSI and Unicode file conversion.
    Windows 10

*Free download enables you to convert 30 items from each folder of OST file.

Awards & Reviews
CNET Award

CNET (download.com)

AxBlaze is one of the best organization in developing many trusted and superiorly working tools that has always proven to be reliable and easy to afford by users. Company provides multiple solutions in the field of Data Recovery, Cloud Computing, Backup & Restore, Email Migration, PDF Management, etc.
Top Ten


AxBlaze offer 20+ advanced tool that facilitates the user to extract their data without losing even a single file. Their technical experts' design and develops tools with advanced algorithms to cater to the diverse needs of their clients across the globe. Their tools are popular for its advanced features and exceptional ease.

3 Main Export Features of the Tool:

OST to PST Converter – Convert OST Mailbox with Complete Items

Export OST Emails with all Properties

OST to PST converter is very helpful to export OST emails with exact meta properties including all types of attachments, HTML formatting, embedded objects, documents, header's details, files, hyperlinks, etc. By using OST converter, you can get the maximum conversion results.

Export OST Contacts with all Fields

OST to PST converter is integrated with a separate option for OST contacts. It export OST contacts to VCF file format with all contacts properties such as Contact Image, Addresses (Home & Business), Phone number, Email Address, Attachments, Notes, Meeting, etc.

Export OST Calendar with all Fields

OST file converter is an efficient tool that makes the conversion process easy for the OST calendar. You can export the OST calendar to ICS file type with complete properties such as Meetings, Meetings Requests, Appointments, Tasks, Events, Locations, Subjects, Notes, etc.

Top Advantages of the Tool

Prominent Features and Benefits

OST to PST Conversion

Convert OST to PST with Complete Items

To access complete items of OST file in Microsoft Outlook, the only way out is to convert OST to Outlook Data File. OST to PST converter is a known application for converting all OST items such as Messages, Folders, Sub-folders, Contacts, Calendars, Journals, To-do list, Posts, Appointments, Meeting request, Distribution list, Tasks, and Notes. By using this tool, you will be able to open OST file in Outlook 2016, 2013, 2010, and 2007.

Batch OST File Conversion

Batch Conversion for Multiple OST Files

Software provides batch conversion for multiple OST files. You can convert multiple OST files to PST file type at once. It is a time-saving process by which you can easily perform bulk conversion.

  • Add File: This option allows you to load the OST file one by one.
  • Add Folder: This option allows you to load multiple OST files at once.
Multiple File Conversion

Miscellaneous File Formats Supportive

OST to PST Converter is easy to use and versatile application that converts OST files into several file formats such as PST, MBOX, EML, EMLX, MSG, HTML, vCard, vCal, Office 365, Exchange Server, etc. You can choose the file format of your choice to access OST files in almost all email platforms such as Microsoft Outlook, Mozilla Thunderbird, Outlook Express, Gmail, Apple Mail, Zimbra, Office 365, Eudora, Postbox, Entourage, PocoMail, Netscape, etc.

OST Folder Structure

Expect Folder Hierarchy during Conversion

We know that users are often confused over when it is to handle data. This is the reason, this application easily supports for maintaining folder hierarchy while migrating OST files into PST. You will get your data in their original folder hierarchy after OST to PST conversion. Software uses advanced QDRT techniques that make the conversion process easy, fast and secure.

Split OST File

Split Converted File into Smaller Parts

Online OST to PST converter is an effective utility that splits large OST files into smaller parts according to Size, Date, and Folder. Data safety is the prime concern that's why developers added this feature that also helps to recover items without hampering data integrity. Now, you don't need to think about Outlook speed.

OST File Preview

Free Preview of OST File Before Conversion

Are you eager to catch the display of the OST files? If this is so then you are lucky because these tools fulfills this desire as well. Connect with the application and find an easy way get the free display of OST file contents. It provides you free preview of OST items in software pane.

OST to Office 365

Migrate/ Import OST to Office 365

New feature of software gives you option to import OST file in Office 365 directly. You can also export data from OST file to cloud by giving a specific date range. Once data is moved to cloud server, you can access data with ease. This a known tool that aims at exporting OST files safely.

OST to Exchange Server

Migrate OST to Exchange Server Profile

Migrate Outlook OST to a New Profile of Exchange server with the tool easily. This tool is very useful while migrating data from one end to the other. This is useful and beneficial while switching of when you are moving to some other place and work on different PC, organization is shifting, or you want to move your important data on another computer.

OST to Gmail Account

Import OST File to Gmail Account

Move OST file to Gmail account directly. This is the easy way to import all OST file contents such as Messages, Contacts, Calendar, etc to Gmail account. Software is integrated with the Message Filtering (optional) option by which you can import specific data only by given date range. Selective data conversion is also possible with the tool.

Windows Compatibility

Wide Compatibility with all Versions

The extra added benefit of these utilities is that it supports all versions of Microsoft Outlook such as Outlook 2016, 2013, 2010, 2007 and Windows Operating system such as Win 10, Win 8, 8.1, Win 7, Vista, XP, etc. This software relieves you in every possible way because it supports converting OST file in all cases.

Repair OST File

Supports Resolving OST Error Issues

If you are using OST to PST converter then possibilities are higher for solving all sorts of error issues with expertise. The automated application workaround every error message by diagnosing the real matter behind the error. Also, it easily recovers corrupted, damaged, password-protected and highly encrypted OST files. OST to PST recovery can be easily done by this tool.

Software Specifications

Minimum Pentium Class
Operating System
Windows 10, 8.1, 8, 7, Vista, XP
512 MB Minimum
Hard Disk
50 MB of free space
License &
Single User License
Can use only on a single system
Technician License
Can be used on multiple machines
Language Supported
English, German, French, Italian, Spanish
Available on Demand
Installation Guide    User Manual
Frequently Asked Questions

A: Check step by step procedure to convert OST file into PST file type:

  1. Download, install and run OST to PST Converter.
  2. Click on the "Open" from Menu to browse OST file and check preview with complete details..
  3. Click on the "Save" button to select Export Option.
  4. Select other options if there is a need.
    Split PST: Split Resultant PST file into smaller parts.
    Message Filtering: Filter messages according to date range.
  5. Click on the "Convert Now" button to start the OST to PST conversion process.

A: Yes, Software provides Batch conversion option by which you can easily convert multiple OST files in one go.

A: Yes, you can convert OST file contents by Date and Folder. You can also export selected emails only from the OST file.

Client Testimonials
Blank Profile
"Recentemente eu estava na necessidade de abrir o arquivo OST no Microsoft Outlook 2016, mas eu não era capaz de fazer isso, pois não há maneira manual de abrir o arquivo OST sem conectividade do Exchange Server. Depois de pesquisar eu encontrei OST ao conversor PST em AxBlaze que tem interface GUI fácil e convertido com sucesso o arquivo OST para o formato PST."

-Alice Betti, Brazil

Blank Profile
"Ho convertito con successo 67 file OST in formato PST per Microsoft Outlook 2010 senza affrontare alcun problema e troppo rapidamente. Vorrei raccomandare questa applicazione a tutti gli utenti per la migrazione delle cassette postali OST poiché converte il file OST in più tipi di file. Inoltre, lo staff di supporto ha affermato che la prossima versione dello strumento supporterà anche la conversione batch. Grazie Team !!"

-Roberto Cervi, Italy

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