7 Best OST to PST Converter Tool for Outlook Users

Anju Chaudhary
Anju Chaudhary

Published On - November 9, 2022

Outlook OST (Offline Storage Table) helps you to work when you are offline, or your Outlook application is not connected to the email server. OST files automatically synchronize with the email server when connected again. Sometimes, issues arise with OST files, and they either get corrupt or become inaccessible. There are various manual methods to combat such situations and recover OST data, but they are not always successful. In such situations or in situations when you are short of time, you certainly need an efficient and secure tool to recover Outlook OST file data. In the present write-up, we are going to discuss some best Outlook OST recovery Tools.

  1. Recoveryfix OST to PST Converter Software

    Recoveryfix for OST to PST Converter is an efficient and easy-to-use tool to recover corrupt/inaccessible/damaged OST files.

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    • It recovers complete data, like emails, tasks, calendar, contacts, etc., from corrupt OST files.
    • It retains the original metadata and folder hierarchy as original and unchanged.
    • Recovers even deleted emails.
    • Can recover specific items using a data filter.
    • You can preview recovered data before saving or transferring.
    • Saves recovered data in various formats like PST, MSG, DBX, EML, MBOX, etc.
    • Can export emails from OST file into Windows Live Mail.
    • Creates detailed log file of the complete record of the recovery process of OST file in text form.
    • Provides the option to recover Non-English characters also, which helps in the recovery of data from ANSI format files.
    • Has the feature of automatic update.
    • You can resume recovery from the particular time you left using a snapshot.
    • Free version available.
    • Supports all versions of MS Outlook and Windows.

    The free version of the software works in its full efficiency and capacity. You can save a finite number of recovered files also.

  2. Kernel for OST to PST

    It is a perfect tool to recover data from orphaned, corrupt, damaged, or inaccessible OST files and export them to MS Outlook PST files, Office 365, Exchange Server, web-based email clients, and other file formats.

    To avoid losing unsaved (unsynchronized) data in OST while rebuilding it, convert your damaged OST file to a PST file using Kernel for OST to PST Converter before you rebuild the OST file.

    • Easy to use and removes any kind of corruption from OST files.
    • Items you can restore:
      • Missing/deleted data of Exchange mailboxes (in scenarios like when you do not have Exchange backups and crashing or downtime of Exchange).
      • Complete OST items.
      • Deleted/lost items from healthy/corrupt OST files.
      • Exchange distribution lists, appointments, emails with all attachments, posts, appointments, contacts, tasks, meetings, requests, journals, notes, etc.
    • Retrieves/recovers multiple OST files to PST simultaneously.
    • OST Recovery tool can recover/convert OST files of any size.
    • Provides complete mailbox preview to help you retrieve selective/all items as per your requirement.
    • Use filters to search desired/specific email(s)/item(s).
    • Recovers OST file items to various formats like PST, DBX, MBOX, MSG, HTML, MHTML, PST, etc.
    • Can restore OST mailbox to Office 365, various email Servers, web mails, etc.
    • Can split large PST files after a particular size limit, viz., 1GB, 2GB, etc.
    • It works in 3 simple steps: Select>Preview>Save.
    • The trial version is available for free.

    The trial version of the software also fights with corruption in OST files and repairs them completely. You can save the limited number of files too.

  3. CloudMigration OST to PST Converter

    It helps you to repair and recover inaccessible/corrupt Exchange Outlook OST files easily and successfully and converts them to PST, MSG, and other formats.

    • It recovers OST mailbox items like emails, tasks, calendar, contacts, etc.
    • Saves recovered OST files into various file formats like PST, EML, MSG, DBX, MBOX, etc.
    • Works in 3 modes of recovery, viz., Standard, Advanced, and Deep, as per the extent of corruption/damage of the OST file.
    • Can recover permanently deleted emails.
    • You can preview the recovered OST files.
    • Can recover non-English and right-to-left characters from a corrupt OST file.
    • Saves the OST recovery process in a log file.
    • Provides a snapshot feature to scan the same OST file later.
    • Can handle alignment errors in OST files.
    • Supports all versions of MS Outlook and Windows.

    The free demo version does not allow you to save recovered data but only to preview it.

  4. KDE Tools OST Recovery Tool

    It can recover corrupt and damaged OST files.

    • Can extract all items like emails, contacts, calendars, Tasks, notes, etc.
    • Maintains metadata.
    • Can import OST files into Office 365 & Exchange accounts.
    • Can convert recovered OST to various file fo5mats like PST, EMLX, MSG, MBOX, vCard, vCal, etc.
    • Can split large OST files between 1GB & 25GB.
    • Can recover multiple OST files simultaneously.
    • You can preview the recovered data before exporting.
    • Supports all versions of Windows, Outlook (2019 & earlier), and MS Exchange Server (2016 & earlier)

    The free version can save up to 30 items per folder only.

  5. SoftSquire OST to PST Converter

    This is a powerful tool to convert inaccessible OST files into Outlook PST files.

    • It can extract all the mailbox items like emails, attachments, contacts, calendar, etc., and convert them into Outlook PST files.
    • Can convert selective emails from the OST file.
    • Saves extracted mailbox data in MST, EML, RTF, PDF & HTML formats.
    • Can export convert OST files directly to Office 365 & live Exchange.
    • Can convert multiple OST files to PST files simultaneously.
    • Can convert encrypted or IMAP OST files into PST files.
    • Can extract deleted items from the converted OST file.
    • Splits and compacts large PST files to avoid corruption.
    • Free version available.
    • Supports Outlook 2019, 2016, 2013, 2010, 2007, 2003, 2002 & 2000.

    The free version converts only the first 20 emails per folder for free.

  6. Remo OST to PST Converter

    It is a reliable tool purposed for the recovery of corrupt OST files. After recovery of OST files, it converts them to Outlook PST file format.

    • It extracts and recovers complete data items like emails, calendar, contacts, tasks, events, etc.
    • Saves recovered OST files in any desired format like MSG, EML, vCard, vCal, HTML, etc.
    • Repairs even orphaned OST files.
    • Repairs multiple files simultaneously.
    • Repairs OST files of any size.
    • Provides automatic scanning to select files.
    • Maintains the hierarchy of items.
    • Automatically splits large files into small files.
    • Can convert and save OST files to Office 365 mailboxes & live Exchange Server.
    • Supports all versions of Outlook.
    • A free trial version is available with no time limit.

    The free trial version allows recovery of the first 50 items per folder.

  7. eSoft Tools OST Recovery Software

    It is an easy-to-use tool designed to recover OST to PST files and helps in the recovery of emails with attachments. It recovers data from corrupt/inaccessible/damaged OST files.

    • Recovers emails, attachments, contacts, calendar, notes etc. from OST files.
    • Preserves metadata, format, hierarchy, and data integrity.
    • Recovers OST to various file formats like PST, EML, MSG, HTML, vCard & EMLX file.
    • Can preview data after recovery.
    • Does not need installation of Outlook application for recovery.
    • Supports Outlook 2019 & Windows 10 & earlier versions.

    The Demo version allows the recovery of 25 items per folder only.


Though there are various manual methods to recover data from corrupt/inaccessible/ damaged OST files to avoid data loss situations, the OST data recovery tool is still the best option to get back your data.

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