Microsoft OST to PST Converter

Repairs corrupt OST files and converts into PST, MBOX, EML, EMLX, MSG, HTML, vCard, vCal, Live Exchange Server, and Office 365 file types.

Quick Benefits & Features of OST to PST Converter:

(Average Rating 4.6 Based on 169 Reviews)

  • Complete Conversion of OST mailbox contents Emails, Attachments, Calendar, Contacts, Notes, journals, and all mailbox elements.
  • Restores all the properties like To, BCC, CC, time, subject, images, date, all attachments, and etc.
  • Converts OST items into various file types such as PST, MBOX, EML, EMLX, MSG, HTML, vCard, and vCal.
  • Restores deleted or permanently deleted OST emails items.
  • Get a free preview and access each message before the actual conversion.
  • Converts OST files and import into Office365 and a Live Exchange Server. New
  • Has an Advanced option to export selected items only. New
  • Splits Large/Oversized OST files into Smaller Outlook PST Files(s).
  • Repairs and converts Office 365 NST file. New
  • Supports conversion of the OST files into MBOX for Mozilla Thunderbird and Apple Mail.
  • Exports OST contacts and Calendars into vCard and vCal file format respectively.
  • Converts the corrupted, password-protected, and highly encrypted OST files easily.
  • Advanced data Filtering Options to save data between two specific dates.
  • Supports MS Outlook 2019, 2016, 2013, 2010, 2007, and earlier versions.
  • No File Size Limitation and recently successfully converted a 215 GB file. New

*Demo Version Recovers/ Preview complete OST items and allows to save only 30 items from each folder.

PDF Installation     PDF Uninstallation    PDF End User License Agreement

Bundle Offer
OST Converter
PST Converter

$99     $49

Reviewed by

Experts Exchange

"KDETOOLS, a well known name now! It has gained lots of fame in just the span of few years in the online market world. Company created many trusted and superiorly working tools in the field of Data Recovery, Email Migration, Cloud Computing, etc."

Trust Pilot

"After reading all the mix reviews about the kdetools software company, I was in doubt but I took a risk (because I wanted to migrate my .ost file data directly into live Exchange server mailbox). But after purchasing & using its software, I want to say that company's service is above the expectations."


Prominent Features of OST to PST Converter

Converts OST Files To Multiple File Types

The OST to PST converter allows the users to convert OST files to various file types such as Outlook PST, MBOX, EML, EMLX, MSG, vCard (for Contacts), vCal (for Calendar), HTML, Office 365, and a Live Exchange Server.

*Message filtering option (as per Date) is available for all the file formats.

OST File Saving Options

Imports OST to Office 365 and Exchange Server

The tool imports OST files to Office 365 and Exchange Server directly. You can also use the Message Filtering option to move the desired emails between two specific date ranges.

*Software is embedded with highly secured techniques, which provides complete data security.

OST to Mail Servers Options

Supports Converting Complete OST Items

The software easily converts complete OST items such as Mails, Contacts, Calendar, To-do list, Journals, Notes, Tasks, Folders, Sub-Folders, and etc. without losing any single data.

*During the file conversion, the tool maintains the 'Files and Folder' structure in their hierarchical order. Properties of all the items will be restored in its original form..

Convert Complete OST Items

3 in 1 - Converts OST | PST | NST Files

The tool provides multiple functionalities so that the users can easily complete all their requirements in a single place.

*The tool easily converts PST, OST, and NST files to the desired file format along with that you can also move these files to Mail Servers such as Office 365 and Exchange Server.

3 in 1 Conversion

Splits Resultant PST Files Into Smaller Parts

Splits resultant PST files into smaller parts:

  • By Size (Splits up to 1 GB to 25 GB)
  • By Folder (Exports selected folders only)
  • By Date (Message filtering option to export items from a specific date range)

*You can also combine all these options for better file management and split the file as per Size from the given data range.

Split OST by Date, Size, and Folder

Recovers and Converts Inaccessible OST Files

(Supports to convert Orphan, IMAP, and Exchange Server Offline Storage files.)

This application provides advanced scanning and OST recovery options and helps the users to recover items from Corrupted/Damaged, Highly-encrypted, and password protected OST files.

*Software automatically detects and fixes OST corruption issues.

OST File Scanning Process

Exports OST Contacts and Calendar Individually New

Software exports OST Contacts and Calendars to vCard and vCal file types respectively. This option will help you to move Contacts and Calendar to any supported platform.

*It converts or exports all details such as Fields, Additional fields, Contacts Images, Properties, and etc.

Export OST Contacts and Calendar

Maintains Email Properties and Folder Structure

The software keeps all email Meta properties such as To, Cc, BCC, Sent/Receive date and time, attachments, and etc. during the conversion process to any file format. Along with that, it also maintains the original files and folder structure.

*There will be no changes made in the internal hierarchy of emails or folders and Meta properties.

Email Properties

Free Preview of OST Email Items

The OST to PST converter by KDETools allows the users to view OST file data of the recovered OST email items including all Folders, Sub-folders, Email messages, Address Book, Contacts, Attachments, Embedded Images, HTML Formatting, Deleted folder, and etc. before the conversion process begins at free of cost.

*Preview facility is available in the free demo version, which enables you to preview complete OST items.

OST File Preview

Compatibility with All the Latest Editions

Microsoft Outlook: Supports all the versions of Outlook 2016 // Outlook 2013 // Outlook 2010 // Outlook 2007 // Outlook 2003
Microsoft Exchange Server: Supports all the versions 2016/ 2013/ 2010/ 2007/ 2003 (SP1, SP2, and SP3)
Microsoft Windows: Windows 10, 8.1, 8, 7, Vista, XP.

*Software supports all OST files, whether it Orphaned, IMAP, or Exchange Server file.

Try KDETools OST to PST Converter for 100% Safe Conversion

PDF Installation     PDF Uninstallation    PDF End User License Agreement

*Free download enables you to check OST file contents and save initial 30 messages.

System Specifications

Support : Windows 10, 8.1, 8, 7 & all below Windows version
Processor : Intel® Pentium 1 GHz processor(x86,x64) or equivalent
RAM : 2GB of RAM is recommended
Hard Disk Space : Minimum 100 MB for installation is required

Note: If you need to customize OST to PST Converter or need additional features then, Contact Support staff

Supported Editions

Microsoft Windows
2000, 2003, 2008, XP, Vista, or Windows 7/8/8.1/10, 2008/2012 (32-bit & 64-bit)
MS Outlook
Outlook 2000, 2003, 2007, 2010(32/64 bit), 2013 (32/64 bit), 2016 (32/64 bit), 2019
Support recovery of OST file of 32-bit & 64-bit New

Software FAQs

Use the steps below for a quick OST to PST conversion:

  1. Download, Install, and Run KDETools OST to PST Converter.
  2. Select the OST files, which you want to convert./li>
  3. Check the full preview of the OST file contents.
  4. Click on the "Export" button and choose PST from saving options.
    *You can also choose the other options based on your requirements such as MBOX, EMLX, vCard (for Contacts), vCal (for Calendars), and etc.
  5. Click on the "Browse" button to save the destination path.
  6. For splitting a PST file, choose the desired option:
    "Split PST" to divide a file by Size
    "Message Filtering" to divide the file by Date
  7. Click on the "Convert Now" button to start the conversion process.

Note: The converted PST files can be easily imported in any version of the Microsoft Outlook.

The OST (Offline storage table) file is the local copy of a user mailbox, which is stored on the Exchange server. By default, you can find the .ost file on the following locations:

drive: \Users\\AppData\Local\Microsoft\Outlook
drive: \Documents and Settings\\Local Settings\Application Data\Microsoft\Outlook

Yes, the tool converts complete OST items into PST for Outlook such as Emails, Contacts, Calendar, Attachments, Tasks, Notes, Email Metadata, etc.

No,the Software does not make any changes in the original file and folder structures and email's properties. It provides the exact data as it is before the conversion.

The software supports converting the OST files into multiple file formats such as PST, MBOX, MSG, EML, EMLX, HTML, vCard, and vCal. The tool moves the OST files to Mail Servers such as Office 365 and Exchange Server.
Yes, the tool easily converts the heavy sized OST files. It splits the resultant file into smaller parts.
Yes, we provide a free demo version by which the user can easily check the preview of the OST file contents including Emails, Contacts, and Calendar.
You are not required to have Exchange server services when the software converts OST to PST.
There is hardly any requirement for the original Outlook profile when it recovers the OST files into Outlook PST.
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