Wondering how to get data from inaccessible OST file, then try Systools OST to PST converter. Its advanced algorithm is able to convert encrypted OST file data to PST format as well by removing S/ MIME & OpenPGP encryption from OST file. Features of Systool OST to PST Tool are as follows

  • Backup, Recover and extract files from Offline OST files
  • Reduce time by converting OST files to PST in batches
  • Systools OST to PST converter allows converting from backup file Outlook.bak
  • The software also displays deleted emails that can be recovered
  • Preview the Outlook Data File OST contents
  • Filter and Sort OST files before Conversion
  • Save Files in EML, MSG and HTML Format
  • Compatible with all Outlook version 2019/ 2016/ 2013/ 2010/ 2007/ 2003/ 2002/ and 2000
  • Can move converted PST file directly into Office 365

Convert Encrypted OST File

OST file that is protected by password is hard to export but the smart engine algorithm of SysTools OST to PST converter decrypt S/ MIME (Secured Multi-purposeInternet Mail Extension) and OpenPGP encryption which unlocks the file and make data accessible. The data from OST is then exported to Outlook PST in original form.

Avoid Data Loss Before OST Rebuilding

Rebuilding the OST file before synchronization result in data loss. So, if you have unsynchronized data in OST it may get lost while creating a new OST, so backup this unsynchronized OST data in form of PST and then use it with Exchange Server.

Scan OST in Two Modes

Systools OST to PST converter gives option to scan the corrupted OST in two modes i.e. Quick and Advanced. The Quick mode is useful if the damage is less and files are recently deleted, to retrieve the old accidentally deleted files go for Advanced Scan. Users can save the scan OST file in computer or use it to export data to Outlook PST file. Systools offer to save scanned OST so that it can be used later.

Seven Modes to Preview OST Files:

Unlike other tools that are limited to one or two preview modes the OST to PST converter scan the entire OST and view the OST contents in 7 modes i.e. Normal view, HEX, MIME, RTF, HTML, Message Header, Properties and Attachments. To ensure user which data files are recovered the tool shows them in red color.

Recover Files from Backup

If there is any Outlook backup file saved with extension xyz.bak then Systools OST to PST tool allows to convert these files from OST to PST. The tool retrieves the data from Outlook data file to Offline OST and then convert it in to PST without any error.

Bulk Export OST to PST

SysTools OST to PST converter supports bulk OST to PST migration i.e you can convert multiple OST file to PST simultaneously which saves a lot of time.

Preview and Filter Data

This OST migration tool lets user preview the files in various modes and filter data by date-range, specify the items in to and �from field. The OST to PST migration will display the items that fall in this category. Thus selected items are moved to PST file which makes the conversion process faster taking less space.

Error-Free File Conversion

The SysTools OST to PST migration tool first scan the corrupted OST file and then remove the errors in OST. It recovers deleted OST components required to execute process and then begin transfer process. So, the tool ensures files move from OST to PST are error-free. It maintains the folder hierarchy and migrate files in their original form.

Generate Export Report

When the OST items are moved successfully to PS file it creates a report of the entire process. From source to destination, SysTools OST to PST converter records all the activities and saved them in CSV format. User can download this report and check the which items are migrated to which mailbox.

Free Download OST to PST

Systools OST recovery software is available to download for free, With free demo version a user can convert first 25 items from each folder to its corresponding emails into PST format. Download the trial version from here


  • Systools OST to PST(Personal)
  • $49
  • Lifetime Validity
  • -
  • Buy Now
  • Systools OST to PST(Batch)
  • $199
  • Lifetime Validity
  • Bulk Conversion
  • Buy Now

Frequently Asked Questions

A: No, SysTools OST to PST converter can be used even if the OST is not connected to Exchange Server. The tool works fine to export Offline OST file to Outlook Personal folders.

A: Well, OST to PST converter comes in four versions and one trial version which is free. You can try the SysTools OST to PST converter and export 25 items per folder for free. You will also get the idea of using OST to PST tool free.

A: The OST to PST converter can avoid this error by closing the Outlook completely. If there is any application running in background then close it

  • Start the Task manager by pressing CTRL+ALT+DEL key
  • Click on Processes tab and then select Outlook.exe
  • Click on the end key to terminate it and then start the conversion process

A: The SysTools OST to PST converter create the UNICODE PST file and this format of PST is accepted by Outlook 2019, 2016, 2013, 2010, 2007

A: With so many OST to PST converter available, SysTools made it stand because its support for converting encrypted OST file, migration of files in several formats and qualitative output.

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