Download OST to PST Converter to Access inaccessible OST Files

Tool to Convert orphaned & encrypted OST to PST File format and allows to Export MS Outlook emails, calendars, contacts, tasks, notes, journals etc. It provides some additional Features like Batch OST to PST Conversion, Advanced Filter and Data Extraction Etc.

(Average Rating 4.7 Based on 141 rating)
Softaken OST to PST Converter

Softaken OST File Exporter to Export OST to PST

Updated OST Converter Software available with Multiple Export feature to recover corrupted OST file from inaccessible Offline data to PST in few mouse clicks. OST to PST Converter embedded with multiple features to export emails, contacts, attachments, email address and calendars from multiple OST files.

  • Quick Scan to recover corrupted OST file and Repair Damaged Data from inaccessible OST
  • Perform Batch Migration and Save Time and Money
  • Free OST Preview for single and Multiple OST Files
  • Extract Email addresses from TO, CC & BCC
  • Convert encrypted & Password protected OST files
  • Transfer OST Calendars and Contacts in diffrent formats
  • Export Outlook OST Address Book quickly
  • Support Outlook 2019, 2016, 2013, 2010, 2007 & 2003 Version
  • Advance Filter to Export desired emails (Filter mails via Date Range, Sender and Subject)
  • Maintain Same Folder Hierarchy with Same Format structure
  • Save OST items into multiple other file exnteions
  • Support Batch OST Conversion

Know more about OST and PST file

ost file

What is OST File?

  • OST or Offline Storage Table represent the user's mailbox data in offline mode.
  • OST file is saved on local machine and users can create emails and other data items in OST file when Exchange connection is not available but later on, all the changes done to OST are synchronized to Exchange Server.
  • Users can work with OST files in the absence of connection to the server.
  • OST file contains items such as emails, contacts, calendar information, notes, and other data. It can be accessed only on Microsoft Outlook all editions like 2019, 2016, 2013, 2010, and others.
  • OST to PST Converter helps users to move OST file to another system by conversion into PST format.
pst file

What is PST File?

  • PST file represents Outlook Personal Storage files and store information like emails, notes, contacts, calendar items and other data.
  • PST files are of two types – ANSI and UNICODE.
  • ANSI PST is older file formats supported by Outlook 2002 and earlier versions. These files have a maximum file size limit of 2 GB.
  • Unicode PST file is created after Outlook 2002 and remove 2 GB file size limit and is increased to 50 GB.

Why You Need OST to PST Converter Tool?

  1. Microsoft Exchange server can unexpectedly crash due to any reason.
  2. In the case of MS Exchange Server downtime or MS Exchange Server maintenance
  3. Recovered even after accidental deletion of user mailboxes on the Exchange server
  4. Transfer Outlook OST Data from one place to another
  5. The operation failed due to a registry or installation problem. Restart Outlook and try again. If the problem persists please re-install error
  6. Your offline folder file could not be configured error

Export Emails

OST File Exporter application export OST emails in PST, MBOX, NSF, EML, EMLX, MSG, HTML, MHTML, TGZ, and PDF formats.

Export Contacts and Email Addresses

OST contacts are safely exported to VCF, CSV and MSG formats. Similarly, email addresses of OST files are saved into a text file.

Export Calendars

Calendars of OST file is saved into ICS and MSG formats by this utility. This helps to access OST calendars in Lotus Notes, Apple Mail, & others.

Export Attachments

Users can quickly extract attachments from OST file. Complete or filtered attachments export from Outlook OST file.

Process Selected Folder

Users have the facility to process selected folders. User can tick mark required folders and perform processing of required folders as per their suitability.

Create Log File

After successful completion of Offline OST data to PST migration, the tool generates a log report showing the results of the conversion along with the destination path.

Support ANSI and UNICODE format

Both ANSI and UNICODE formats are supported by the software. The users can view the converted PST files to all versions of MS Outlook.

Preserve Non-English Language

The software is capable to recover Non-English language OST file emails. It well preserves Non-English characters and the right to left characters.

Advantages of Preeminent OST to PST Converter Software

Convert Files

Add Search and Preview OST Files

There is no requirement to install MS Outlook to perform the conversion. Users can Open Outlook OST file without having Outlook. The software is independent to work alone and once OST file is scanned, the tool provides an instant preview of Offline OST items. From there, a user can right click on any message and save it in HTML/MHTML format to view any of the web browsers. Similarly, contacts are saved in vCard format and calendars in ICS format.

Convert Files

Convert OST to PST with all Properties

The OST to PST Converter software considers complete OST file including its emails, contacts, notes, journals, to-do-list, and other information from OST file into PST format. Moreover, the software provides converting OST file into different file formats such as PST, EML, EMLX, MSG, MBOX, HTML, and vCard formats. Emails as well as its attached files are safely exported into PST format without any hurdles and delays on the way of migration.

Convert Files

Export Selected Folder

The OST Converter is easy to handle and there is no need of technical expertise to export Offline .ost file into .pst format. Users when load OST file and get preview of OST file. At that time, users are provided with options to export selective items or complete OST file into personal storage table format. Some simplified clicks are needed to perform the migration. Moreover, users will get these options separately to choose complete or desired folders from OST file for migration.

Convert Files

Support Password Protected Outlook OST files

There are no worries if you have a password protected Outlook data file. The software works in a simplified manner and export complete mailbox items without any trouble. The users will not face any issues and any data harm while exporting OST mailbox items into PST format. 100% accuracy is maintained during the export process. Users can save the conversion results by creating a new PST file on their local system.

Convert Files

Exclude Empty Folders from large Sized OST Database

The users have full freedom to export any size OST file. The software supports any large size OST file. Plus, users have the facility to exclude blank folders from the list of conversion. For this, the users need to enable 'ignore empty folders' option and this will not affect the folder hierarchy and you will find results after excluding empty folders. In this manner, extra items can be easily removed from OST file and hence the conversion task be performed without any extra efforts.

Convert Files

Skip Unwanted Folders and Export Desired Database from OST

Once OST file is being scanned by the application, the users will get complete mailbox preview where all folders inside OST file are shown on the left side of the wizard. A user can tick mark required folders from there. In this way, a user can perform the required items conversion in a safe and quick manner without any hurdles. Plus, a user can save the exported items to their defined location without any disturbance and losses.

Convert Files

Preserve Original Language & Meta Data

Safety of data is one of the essential features during migration of OST data into PST format. The software takes care of it and perform the conversion in a proper way. It keeps all metadata items intact as original. To, cc, subject, bcc, attachments and the formatting applied to the emails are maintained properly. The original language of the data is duly preserved by the utility. Overall, security of data is on the topmost priority.

Convert Files

Maintain Folder Hierarchy in All Export Options

There will be no changes in the internal hierarchy of emails or folders while users convert .ost file into .pst and other formats provided by the tool. The application makes the conversion by organizing all data in a sequential manner as it was earlier to the conversion. No folder is missed and misplaced during the migration of offline storage table into PST format. You can say, the software is a trusted one app on which users can rely to export offline .ost file into .pst format.

Convert Files

Support All Windows Operating Systems

The OST Conversion software can be easily downloaded on all versions of Windows such as Windows XP, Vista, 7 and higher versions. There is no effect on the processing by this tool even you are running other tasks in the background on your desktop. The application doesn't disturb other tasks and it will not affect the speed of the conversion. The conversion all Windows operating systems is performed in a hassle-free way.

Convert Files

Work with all MS Outlook Applications

The application provides complete support to all versions of MS Outlook. After successful conversion from OST file, a user can import PST file in MS Outlook 2019, 2016, 2013, 2010, 2007, 2003. Without any trouble, you can read PST file on all editions of MS Outlook. The migration can be easily carried out in the absence of Microsoft Outlook and users can pick any file format to save OST file from the available formats.

Advance Filter

Deep Filtration options

Once PST file is loaded and display on the software screen, the users can pick items from OST file for conversion. Apart from that, users can filter the database more deeply with the Advanced filter options. Here, users can filter the database according to date range i.e. by specifying a start date and end date to export OST database to PST & multiple formats. Users can also filter the database according to subject, from, to, etc. and simply apply the filters. By these, the only required database can be exported from OST file.

export email address

Extraction of email addresses

OST Exporter is capable to extract only email addresses of multiple OST files at a time. A separate text file will be created to save email addresses of every OST file. The tool itself ignores duplicate email addresses of each file. There is an option 'include sent item folders' by which one can voluntarily include or exclude email addresses of sent folders. There is no damage and misplacement of any email address during the extraction process with this risk-free application.

Extract Attachments

Extract attachments from multiple OST files

OST Converter lets users export multiple OST files so with this, users have the options to extract attachments from multiple OST files. All the selected OST files complete database or required database is exported by users as per their requirements. Moreover, the application works completely as per user instructions. The attachments and email formatting are well preserved and exported with OST emails in a risk-free manner. The users don't need to take tension of any loss and file misplacement with OST conversion program.

Open Multiple OST

Bulk OST files migration

Batch OST Converter Tool ensures that the conversion is performed under a safe roof. Using the folder mode, it is possible for users to convert multiple OST files in a single attempt. A user can export OST files of every size. Irrespective of file sizes, the utility deals with OST files of various sizes. There is no effect on the tool's performance due to the number of OST files. It's working efficiency remains the same whether you export single OST file or multiple OST files.

Convert calendars

Convert Calendars in ICS & MSG formats

The application provides users the option to export calendars of OST files into ICS format. It is a universally accepted format for saving calendar entries. Apart from it, users can save calendars to MSG format to directly import OST calendars in MS Outlook. The MSG file having calendars can be simply imported to all MS Outlook editions. After providing the instructions to the application, it hardly takes few minutes to convert OST calendars into ICS and MSG formats. In this manner, users can access OST file calendars to Thunderbird, Apple Mail, and other applications.

Convert contacts

Convert contacts in CSV and MSG formats

The powerful application converts Address Book of OST into CSV and MSG formats. By exporting OST contacts into MSG format, these contacts can be easily imported to Microsoft Outlook application. Moreover, CSV file format is supported by various applications like Lotus Notes, Thunderbird, Apple Mail, Gmail, Yahoo, etc. In this way, OST contacts can be easily accessed on various platforms. Users can export unlimited contacts from OST file and with some clicks, the OST contacts are ready in CSV format whom they can access cloud-based and various desktop applications.

Tools Faq's

Follow below Steps to to convert OST to PST File format

  • Step 1 –: Download and launch the software on your Windows system.
  • Steps 2 –: Click on the Browse button and add OST file of any size.
  • Step 3 –:This will show you a complete preview of OST file.
  • Step 4 –:Select Convert to PST in Export Type. Here, you can also select some folders or complete OST file.
  • Step 5 –:Provide an output destination to save the conversion results.
  • Step 6 –:At last, click on the Convert Now button.
Without Exchange Server environment, it is possible to perform the migration without any trouble.
The software provides 9 different formats to save OST file and they are PST, EML, EMLX, MSG, MBOX, HTML, MHTML, vCard, and ICS.
A single OST file is exported at a time in personal license but batch option is available in Business and Enterprise License. You can Process multiple OST file conversion at a time
Yes, the converted PST file can be viewed easily on all versions of MS Outlook including Outlook 2013, 2016, 2019 version.
Yes, once OST file is converted, you can move this file to another system.
Yes, any OST file is converted by the software without considering its size and number of items hold by it.
OST and PST are the two major file formats of MS Outlook to store data. MS Outlook files including emails, messages, attachments, tasks, calendars etc. can be stored in OST or PST formats. MS Outlook files are saved on computer or a mail server. If the data of MS Outlook is saved in OST or PST, in both formats there are no such changes seen in the file structure. Though, some differences can be noticed.

OST, the file extension is also known as Offline Storage Table that clearly indicates its work capacity. It creates an offline folder to make offline copies of Exchange Server mailbox data. In a MS Exchange Server, all types of mailbox items are exported and saved on the server. A local copy of these mailbox items can be saved in a local computer by configuring MS Outlook. And these copies are considered as OST. No matter the network is either down or running, OST files can be opened and operated. Make sure that the Outlook is in Cached Mode in order to access OST files.

PST or Personal Storage Table: PST is popular format of Outlook. It is widely accepted to save email communication files including messages, calendars, tasks, notes, appointments, events, RSS These files are saved on a local computer. These files are easily transferred to system to system, providing easy distribution of files.

Software Specifications

System Requirement

ProcessorAny Pentium Class

Operating SystemWindows 10, 8.1, 8, 7 & Other

Memory512 MB Minimum

Hard Disk100 MB of free space for software installation

Software Delivery

ElectronicVia Email


Interface Available

Language SupportedEnglish

Support OptionEmails, Chat & Skype

Customer Reviews

What Our Customer Says


Patrik Scherer

United States

I tried the free version before purchasing license version, but free version only shows preview then I contacted support team and ensured will it work or you will refund. They agreed and then I purchased license and converted my OST very smoothly. Smera helped me out for my migration, thanks for your support.

Amir Nahvi


Softaken offers great conversion utilities like OST Converter, the best utility of yours.

Sharon Gillings


I download this app from freeware site and tested with my 40GB OST files and successfully checked complete preview. Licensed version is easy to export OST files into Outlook and other file format. Great job team.

Patrik Scherer

United States

This Microsoft Outlook OST Conversion process helped me to switch from OLD outlook version to new application. The process was simple, I was so impressed that I had to buy personal licensed instead.

Lori Thornton

New Caledonia

I bought this software after testing 4 other tools. Only this software is working with Outlook 2016. I appreciate developers work and the UI and speed of conversion is awesome.

Tony Weston

New Caledonia

I had never imagined a conversion rate, it's created 100% accurate Result. I checked and count all mailbox items. It creates Result as replica.

Roja Ramanan Vilvapathy

United States

This is the best MS Outlook OST to PST Converter tool. I can suggest this tool for heavy and large sized OST mailboxes.

Ricardo Sawirjo

United States

I checked multiple tools but the UI and process of this tool is fantastic. The software conversion is very fast and it worked like a charm.

Dan Weisshaar

United States

First I checked freeware OST Converter software on internet but did not found any tool so I tested this and purchased personal license for my 48GB OST file. The conversion rate of this application is 100%. Your software is the best utility for OST conversion, thank you.

Harris Greenberg


Best for OST to PST migration tool, I highly recommend this tool to Export OST files.

Olivier Cochard


It does the job what is made for. I will recommended this OST file converter. Thanks Adam to help me.

American Jewish Archives


Great utility, have been purchasing OST tool to transfer my data for Outlook for 1 year ago. Have tried em all before. None of them compare, OST File Exporter uses very little memory and transfer complete OST files quickly. The conversion rate is 100% and I love conversion speed.

Roger Vesely


Does not slow down the computer at all, best features integrated and nice preview. This tool is best for OST migration.

Stephan McVaugh


Have had OST File conversion for years, worked great. Does all that expected of this utility for OST migration. It offers multiple options and I can also export few messages in HTML file format that is great feature.

Jim Nelson


It's provided within in 1 mutinies and converted my OST files quickly. Thanks this is such a nice utility for transferring Outlook OST into PST file format.