OST to PST Converter Software

A smart utility endowed with supreme algorithms to recover and export Outlook mailbox items from OST to PST files faultlessly. Export Outlook data from all types of offline OST files like encrypted/corrupt/damaged and orphan.

  • Safely Export to PST with no data misplacement or errors.
  • Export all Outlook mailbox items - email, contact, calendar, etc.
  • Select and transfer specific folders from OST files.
  • Recover Outlook items from inaccessible OST files.
  • Apart from PST, get more options to export OST file data.
OST to PST Export Software

Special Features of Export OST to PST Software

OST to PST exporter

Instant Fast Software Delivery via Email

30 days return policy

  • Securely export entire mailboxes from Outlook OST to PST files.
  • Save OST mailbox to PST with 2 modes – Export to PST and separate PST for all mailboxes.
  • Read all the data available in the OST by opening OST file directly in the software
  • Convert OST to PST with complete Outlook items- email, contact, calendar, and other items.
  • OST mailbox items export to more formats- EML, MSG, HTML, MBOX, vCard, ICS, & more.
  • Move OST mailbox data to cloud mail - Gmail, Yahoo Mail,, Office365, and IMAP.
  • Migrate data from one as well as multiple OST files in a single operation.
  • Select required folders from OST files, and convert OST with only those.
  • Perform OST recovery & recover data from corrupted/encrypted or orphaned OST.
  • Choose a location yourself to store the newly generated files through the software.
  • Complete OST to PST recovery and export process without the need for Outlook.
  • Easily run the software on all computers with Windows operating system (up to Windows 11).

Demo version: Recover & Export OST to PST with 25 items from each folder without zero charges.

OST to PST Export Tool's More Features

Safely Export Outlook OST to PST File

Experience seamless OST to PST conversion with the advanced Export OST to PST Solution. It will easily convert OST to PST to resolve various Outlook OST file errors, such as Error Code 0x8004103b, OST Internal Error (Error Code = 00000003), Service-Specific Error 0 (0 ✕ 0), and more.

Ensures comprehensive recovery and export of all essential Outlook data including emails, contacts, calendars, notes, tasks and journal items. Whether you need selective folder conversion or a complete migration of your OST files, this software will offer exceptional performance.

Know complete process >> How to Export OST to PST files?

ost to pst file export
convert single or multiple ost files

2 methods to export OST

OST to PST Export software featuring 2 different modes of conversion: -

  • Single OST File Conversion: - Effortlessly Convert OST to PST files individually.
  • Bulk OST File Conversion: - Convert multiple OST files to PST at once, saving time and effort.
save ost to pst

Saving OST mailbox to PST

Preserve export OST Mailbox to PST with 2 distinct options: -

  • Export to PST: - Transfer mailboxes from multiple OST files to a single PST.
  • Separate PST for all mailboxes: - Each OST mailbox saves in separate PST file.
open Outlook OST files

Shows OST files' inner data

Users can see a clear preview of each item in the OST file within the preview panel of the Outlook OST recovery tool. This feature comes in handy when you need to quickly evaluate the result of the conversion process. Preview emails, contacts, calendar entries, notes, tasks, journals, and more in the software preview panel.

export all Outlook OST items

Complete OST Mailbox Export

Easily recover and export all Outlook mailbox items - contacts, calendars, tasks, notes, journals, emails and other data from OST files. Recover every mailbox item in its original format without losing any data. Save contents from recovered OST files in new file formats, such as PST, EML, MSG, and others.

convert ost to 9+ conversion formats

Convert OST to More Formats

Convert OST to PST files instantly and get many additional file types that users can convert OST into. Export Outlook items from OST to various file formats including- PST, EML, EMLX, MSG, HTML, vCard, ICS, MBOX, CSV, MHTML and Zimbra TGZ files. Also, get a separate option to import OST mailbox folders directly into the Thunderbird profile.

OST to cloud mail

Migrate OST to Cloud Mail

Convert OST files to PST format and also be able to directly move Outlook mailbox from OST to Cloud mail applications. Upload Outlook OST file data to different cloud mail apps like Office 365, Gmail, Yahoo Mail, and many more IMAP-based web email applications.

export selective folders

Chosen OST Folders Export

OST to PST exporter software shows all mailbox folders and inner items in a tree hierarchy within the software. For conversion with some specific folders, users just need to check the folders from the folder list and proceed with the OST export process.

maintain data and folder structure

Preserve Data Integrity

While executing Outlook OST to PST Export job this OST export tool takes care of the original OST file's internal structure and data. It maintains folders, and sub-folders hierarchy and also preserves each Outlook item with their original formatting.

no MS Outlook need

No need to depend on MS Outlook

OST to PST export software does not require any additional software to complete the OST to PST export task. It doesn't even require an MS Outlook application on the machine to execute the OST conversion operation.

working on windows

All Windows Version Compatibility

Run Outlook OST to PST export software on all old to new Windows O/S versions. The software will run equally on every computer without causing any problems. Use the software on all Windows OS versions including- Win 11, 10, 8.1, 8, 7, Vista, XP and below versions.

export ost to pst free

Free OST to PST Export Demo

A demo version of eSoftTools OST to PST export software helps to analyze the functionality of the software without purchasing it. It will enable you to open and read data from unlimited OST files and also allow you to export up to 25 items from each OST mailbox folder to PST without spending a single penny.

Software Comparison - Demo vs Full Version

Software Features Trial Version Full Version
Export OST Mailbox to PST
Convert OST to other available conversion formats
Import OST to Cloud- Office365, Gmail, Yahoo Mail & IMAP
Batch Export OST files
Open and Read Outlook Mailbox items
Filter Emails by date
Convert unlimited OST files Convert OST & Export 25 items from each chosen folder of OST
Download Now BuyNow ($29)

Software Specification

Trial Limitations

Free OST Conversion to PST and other available export options with upto 25 items from each folder.

Software Info


Version Support
PST & OST files of all MS Outlook editions

Personal, Corporate, Technician, & Enterprise

Language Supported
English, German, Italian, French, Spanish

System Requirements

Intel® Pentium Class

Operating System

Hard Disk Space
50 MB of free hard disk space

Minimum 512 MB is required

Software Delivery


Delivery by E-mail

Supported Editions

Works with all windows O/S editions 11, 10, 8.1, 8, 7, below editions

Frequently Asked Questions (FAQ)

  • Download and run this eSoftTools OST to PST Export software on a windows PC.
  • Click on Select OST button and choose single OST conversion or bulk OST conversion
  • After selecting the conversion mode add OST files and click on Start Scanning.
  • Load all OST mailbox data and items and view them in the software panel.
  • Choose required OST mailbox folders and click on Save OST button from menu bar.
  • Select conversion option Export to PST or Single PST for all mailboxes.
  • Use mail filtering option, choose a saving location and hit the Convert

Know complete process >> How to Convert OST to PST files?

OST to PST Converter software

Yes, software has two options for saving OST mailboxes in PST files: -

  • Export to PST: - Create a separate PST file for each OST file and save data.
  • Single PST for all mailboxes: - Export data from multiple OST files and save inside only one PST.

There is a bulk conversion feature available inside this tool that enables you to convert any number of OST files at once without any hassle.


Yes, users also get the Split PST feature when using the Export to PST conversion option. This will enable you to split the resulting PST file into different size ranges – 1GB, 2GB, 3GB, 4GB, 5GB, …… 25GB. (Each resulting PST file will be of the selected size.)

The conversion time depends on the size of your OST file. Small-size OST files will be converted in less time, larger OST on the other hand will take more time.

Yes, corrupt/orphaned/encrypted as well as healthy offline OST files, all types of OST files this software will convert without any issue.

Yes, OST files from all old to new MS Outlook versions are convertible. A user can convert their OST file generated from Outlook 2021, 2019, 2016, 2013, 2010, 2007, 2003 and others without any issue.

To do this, a mail filtering option has been specifically added to this software. Users can filter emails of a specific date range from OST files and export them specifically.

Users with zero technical knowledge can use this software without any difficulty. It has a graphical interface and is very easy to use for any type of person.

Client Most Valuable Review's

(Rated 5 Star)
Recently, I used this software from eSoftTools which helped me to transfer Outlook items from OST to PST files. All Outlook items, including emails, contacts, calendars, and other mailbox items, are transferred with their original information retained. I got the best results from this tool, so I would recommend this software to everyone.
[ James Trammell ]  [ Austria ]
(Rated 5 Star)
I have used this OST to PST export tool and used its bulk conversion feature. At one time this tool allowed me to convert more than 90 OST files simultaneously. All the data of the selected OST files has been exported without causing any problems for me. It is a smart program and it provides the conversion output accurately.
[ Leah Agee ]  [ Brazil ]
(Rated 5 Star)
Earlier I used to use Outlook so I have some OST files in my drive. However, I was unable to open them even inside Outlook. After searching on the internet, I found this OST exporter which also works to open OST files. With this software, I have opened my OST files and exported my important data to HTML files with ease. I am grateful to the developers who created this software.
[ Herbert Yan ]  [ Czech Republic ]