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Best OST to PST Converter

[Trusted by Microsoft MVPs]

(Top Rating 4.9 Based on 1639 Review - TrustPilot

Free OST to PST Converter is a well-designed software with advance algorithm and reliable method to Convert OST to PST in Microsoft Outlook and Other file [PST, MBOX, MSG, EML, EMLX, and CSV, vCard, ICS, HTML]format and Web-based email client Office 365, Yahoo, Gmail, Thunderbird, iCloud, GoDaddy Email, Amazon WorkMail etc.


Free Download     Buy Now        

Free Demo: *Download enables you to preview the converted file and save 30 items per folder.

When to Use KDETools OST to PST Converter?

Software Box

KDETools OST to PST Converter - 100% Safe and Secure

OST to PST Converter to Converts the entire OST mailbox into multiple file types such as HTML, EML, PST, EMLX, MSG, PDF, Exchange Server, Office 365 etc.

  • Supports 'Batch Conversion' and the user can convert multiple files at once.
  • Converts single and multiple files from OST to PST format.
  • Converts OST files such as Notes, Tasks, Folders, Calendars, Attachments Contacts.
  • Retains the email Meta-data such as From, To, Cc, Bcc, Subject, Date, and etc.
  • Maintains the HTML formatting even after the conversion process.
  • Using the 'Selective File' option, the user can select the desired files.
  • 'Split Resultant' option that enables the user to split large PST files into smaller parts.
  • The tool excludes the empty folder while converting the data.
  • It generates a log report after converting the data.
  • It can extract data from orphaned, password-protected, damaged, deleted, and corrupted files.
  • The user can preview the entire selected data before the conversion process.
  • It directly converts the files to Live Exchange Server and Office 365 with Mapping Option.
  • Migrate OST files into IMAP [, Thunderbird, Godaddy, Yahoo, Hostgator, Rediff etc
  • Converts OST files into numerous formats such as EML, PST, EMLX, MSG, PDF,
  • Using the 'Message Filtration' feature, the user can convert files between specific dates.
  • It performs a risk-free conversion of data without changing the original folder structure.
  • The software supports all the below and latest versions of Outlook and Windows.
  • No File Size Limitation and recently successfully converted a 215 GB file. New
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*Demo Version Recovers/ Preview complete OST items and allows to save only 30 items from each folder.

Reivew OST Installation     Reivew OST Uninstallation     Reivew OST   End User License Agreement
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OST Converter
PST Converter

Buy 1 Get 1 Offer: $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 [15+] Different File Formats.

The OST to PST converter converts OST files to different file formats such as Outlook PST, MSG, PDF, HTML, EML, EMLX, vCal, vCard, Office 365, Exchange server, and etc. The tool performs a safe conversion of files without losing any file.

  • Outlook PST: The user can convert OST files to PST format by using the tool. After the conversion, the user can access the data without any hassle.
  • EML: [Windows Live Mail] By using the advanced tool, the user can access the OST files in EML format. The software converts OST files into EML file type.
  • EMLX [Apple for Mac]: The software converts OST files into EMLX format and the user can operate their OST in EMLX format.
  • vCard [Contacts]: The tool converts the entire OST contacts into vCard format and the user can access it without any trouble.

OST File Saving Options

Supports 'Batch Conversion' of OST Files New [Technician]

The OST to PST Converter supports the 'Batch Conversion' of OST to PST files that allow the user to convert multiple OST files to PST format at once. The user can select numerous files and the tool will convert in one go without any modifications.

  • Use File Mode: This option enables the user to create a separate PST file for each OST file.

  • Use Folder Mode: This option allows the user to merge numerous PST folders into a single OST folder.

OST to Mail Servers Options

Convert OST to Office 365 [Cloud] Directly

The OST to PST Converter to Imports OST files to Office 365 account directly after filling all the necessary details such as Username, Password, and etc. From the available options, the user needs to click on the 'Office 365' option.

The software has advanced algorithms that allow the user to directly convert their OST data to various Office 365 plans such as Pro Plus, Business, and Enterprise E1, E3, and E5. After converting the OST files to Office 365 account, the users can easily access the data.

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

OST to Mail Servers Options

Converts OST to Exchange Server [Live] directly

The OST to PST converter converts OST files to Live Exchange Server account directly. The user just needs to click on the 'Live Exchange Server' options from the displayed options. After filling the correct login details such as username and password, the user can access the data without any hindrance.

The tool ensures a positive result and performs a safe conversion of OST files to Live Exchange server.

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

OST to Mail Servers Options

Splits Resultant PST Files Into a Small File

The OST to PST Converter to Splits the resultant Large PST files into a small file:

  • Split By Size: The tool enables the user to split the PST file size starting from 1 GB to 25 GB. The user needs to select the file size depending on their requirements.
  • Split By Folder: The software allows the user to split the resultant file and move the selected folders. The user can split the selected folder and create a new folder.
  • Split By Date: The converter converts the data between two certain dates. The user needs to select two dates and the tool will split the files between the mentioned dates.

*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

Converts Single and Multiple Files

The OST to PST Converter has a wide range of features that make the whole conversion of data faster and safer. The tool allows the user to convert single and multiple files depending on their requirements.

  • Convert A Single File: The software allows the user to convert a single file. The user can select the desired file they wish to convert and start the conversion process.

  • Convert Multiple Files: The tool converts multiple OST files to PST format without losing any data. The tool allows the user to convert numerous files in one go.

3 in 1 Conversion

Converts OST Contacts to vCard Individually New

The OST Contacts to PST Converter to converts multiple OST contacts to vCard only [Contacts/Address Book] format. The tool performs a secure conversion of OST contacts to the vCard format without data loss. By using the tool, the user can view the contact details such as name and date of birth.

The tool allows the user to migrate OST contacts such as business number, home, and primary to vCard format.

Export OST Contacts and Calendar

Converts OST Calendars to vCal Individually New

The OST Calendar to PST Converter Tool allows the user to convert multiple OST calendar items to vCal only [Calendar] format safely. By using the tool, the user can migrate to the Calendar Attachments, Data, Meetings, Appointments, and etc. to vCal file type without altering the data.

The OST Calendar to PST Converter software ensures a 100% conversion of data without any changes.

Export OST Contacts and Calendar

Maintains the HTML Formatting

The OST to PST Converter maintains the HTML formatting while converting the data. The efficient tool retains the inline images and the HTML formatting once the conversion process is finished. The software also maintains the SMTP Header and the images used in the message intact.

Once the conversion of OST files to PST format is over, you will notice that the HTML formatting does not alter.

Convert Complete OST Items

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

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

Get Free Display Preview Of OST Items

The user can get a free preview of the entire selected data by using the 'Preview' option. The converter allows the user to preview OST file data before starting the conversion process. The OST to PST converter has an advanced feature that allows the user to double-check the content before converting the files. .

*Display Preview facility is available in the Both Demo or Paid Version, which enables you to Preview Complete OST items.

OST File Preview

Retains The Original Structure Of MetaData And Folders

The OST to PST converter retains the original structure of MetaData of an email such as From, Date, Subject, To, Cc, Bcc, and etc. After converting the OST files to PST format, the user will notice that the original structure of MetaData does not alter. The advanced software also does not change the original form of the folder structure even after completing the conversion process..

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

Email Properties

Supports Convert OST | PST | NST Files [Technician]

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

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.

Software Specifications

Minimum Pentium Class
Operating System
Windows 10, 8.1, 8, 7, Vista, XP
512 MB Minimum
Hard Disk
50 MB of free space
License &
Single User License
Can use only on a single system
Technician License
Can be used on '3' systems
Language Supported
English, German, French, Italian, Spanish
Installation Guide    User Manual    Purchase Related FAQs

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

Best way to Convert OST to PST in simple steps:

  1. Free Download KDETools OST to PST Converter and lunch
  2. Browse/Open OST files, using Add single or Add Multiple OST option
  3. Now See the full Preview of the OST file database [emails, contacts, calendar, attachments] etc.
  4. Click on the "SAVE" button and select Outlook PST 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. "Browse" 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 " button to start the conversion of OST to PST process.

Note: The converted PST files can be easily imported in any version of the Microsoft Outlook 2021, 2019, 2016, 2013, 2010, 2007.

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.

YES,with the OST to Office 365 Converter, you can easily directly import OST files into Office 365 mailboxes, Public folder, and Archive mailboxes by using the mapping option, you can choose whether to export OST into Office 365 the User mailbox/ Archive mailbox/ Public folder.

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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