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Ultimate OST to PST Converter Tool


Professional OST Recovery and Conversion - 2in1 Solution

Proficient OST file Conversion tool offers an advanced solution for managing and converting offline OST files to PST without size restriction. OST file conversion tool designed for fastest speed with dual-method option to repair corrupt or inaccessible OST files and Converting into more file formats like MS Outlook PST / EML for Windows / vCard for Contacts / ICS for Calendar / MBOX / Office 365 / Exchange server / Gmail IMAP and Gsuite in a trouble-free manner..

The Best OST to PST Converter software is the definitive solution for transforming inaccessible, corrupted or orphaned offline *OST files into fully usable PST format with (all data like emails, attachmetns, folders, contacts, tasks, and journals, sub-folders). It empowers both individual users and organizations to regain complete access to their critical mailbox data in MS Outlook, even in the event of an Exchange Server crash or mailbox dismount. Verified by Microsoft MVPs, this tool stands out as one of the most reliable methods for secure OST file conversion.

(Average Rating 4.9 Based on 9397 Reviews)

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Key Features of the OST File Converter


The software is presented as a professional, all-in-one solution for handling OST files.

  • Quick & Perfect Conversion: Ensures fast and accurate conversion of OST files to PST.
  • Batch Processing: Allows for adding multiple OST files without any size restriction for conversion.
  • No File Size Restriction: Allows for adding multiple OST files without any size restriction for conversion.
  • Preview Option: Includes a preview option for viewing OST items before the conversion process begins.
  • Multiple Saving Formats: Convert OST file in PST, HTML, EML, vCal, vCard, and MSG.
  • Recover Delete OST Items: Provides fast and accurate recovery of "hardly deleted" OST files.
  • Repair Capabilities: Can repair data from orphaned, password-protected, damaged, deleted, and corrupted OST files
  • PST Splitting: Offers an option to set the size for the resultant PST file to split large files into smaller.
  • Selective Conversion: Provides a new option to convert selective items from OST Mailbox
  • Message filtering supports message filtering to convert files between specific dates [DD-MM-YYYY to DD-MM-YYYY].
  • Data Integrity: Properly maintains the hierarchy of the folder and data originality during conversion.
  • Direct Migration Option: Capable of exporting OST files directly into Office 365 / Exchange Server / Gmail / Gsuite.
  • Support ANSI & Unicode: Supports conversion of PST files (both ANSI & Unicode) from all MS Outlook Versions (2024, 2021, 2019, 2016, 2013, 2010, 2007).
  • Windows Compatibility: Compatible with Windows 11, 10, 8, and other previous versions..
  • Free Demo: A free demo version is available to allow users to evaluate the software's features before purchasing.

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OST: Offline Storage Table


The OST – (Offline Storage Table) file is a proprietary data including (emails, calendar entries, and contacts) created by Microsoft Outlook to store mailboxes on your hard drive. It enables users to access their data and continue working (reading, composing, and making changes) even when the mail server connection is lost or unavailable. OST files are primarily used in Microsoft Exchange Server / Outlook Office 365 or IMAP accounts (when operating in Cached Exchange mode).

If you make changes while offline, *OST file, Outlook automatically synchronizes these Restored to the main server mailbox.

PST: Online Storage Table


The PST – (Personal Storage Table) files is a versatile, standalone used by Microsoft Outlook to stores essential mailbox data—emails, contacts, calendars, and more—but unlike an OST file, PST files are not encrypted or tied to any specific Outlook profile or mail server. They are the reliable choice for backup, archiving or migrating Outlook data safely from one computer or profile to another.

Online Storage Table - PST for Microsoft Outlook

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Benefits & Features of KDETools OST to PST Converter

Advance OST Converter Properties to Instantly Export Offline OST to Multiple Formats



Convert OST files to Several formats


The OST file Conversion tool allows you to export data from the offline OST file and import it directly into several popular formats, including Outlook PST, MBOX, MSG, HTML, EML, EMLX, vCal, and vCard and guarantees a safe conversion process without losing any file.

The OST to PST Converter tool provide you to Migrate OST to Mail Server such as: Outlook.com, Exchange Server, Office 365, Apple for Mac, Thunderbird, Windows live mail, Godaddy, Yahoo, Hostgator, Outlook.com, Hotmail.com by using OST to PST Converter tool. After the conversion and Perform these easy steps:

  • Download OST to PST Converter and Run
  • Browse OST File in Software and Scan/Preview OST Data
  • Select/choose Outlook PST option and Hit Export Now
  • Now You can Use Output PST File Accordingly

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Direct Migrate OST to Office 365 / Microsoft O365


The OST to Office 365 Converter to direct migrate OST mail to Office 365 account 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.


Direct Convert OST to Exchange Server [Online]


The OST to Exchange 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.

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More Key Features – KDETools OST to PST Converter Tool

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Bulk OST Mailbox Migration [All in One].

Bulk PST Mailbox Migration

The OST to PST Converter is a Batch OST to PST Migration tool 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.

Add Single OST File: This option enables the user to create OST file to separate PST file

Add Multiple OST files: This option allows the user to merge numerous PST folders into a single OST folder. .

Quick Migrate OST to Gmail | Gsuite | Google WorkSpace

Quick Migrate OST to Gmail | Gsuite | Google WorkSpace

OST to Gmail Migration - the users can execute a safe yet fast migration from OST to Gmail, Google Drive, and GSuite. The OST to Gmail Migrator software enables the users to directly migrate OST to Gmail, GSuite, and Google Drive without deleting a single mailbox item. The users can migrate their entire OST mailbox items to Gmail and GSuite after submitting their respective account details correctly.


  • Enter the Login details
  • check and Enable IMAP Security setting
  • Imap.gmail.com
  • Connect to Gmail IMAP Server

Transfer OST to MBOX for Thunderbird

Transfer OST to MBOX Migration for Thunderbird, Apple for Mac

The users can also perform a secure and successful conversion by using the OST to MBOX Converter to convert OST to MBOX file format directly. The users after launching the powerful software on their system can select the desired OST items which they wish to convert to MBOX format at the desired location. The users need to implement a few basic steps and complete the conversion process from OST to MBOX in no time.

Splits high large PST Files by Size

Splits high large PST Files by Size

The OST Splitter 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..

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

Converts OST Contacts to vCard Individually

Converts OST Contacts to vCard Individually

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.

Converts OST Calendars to vCal Individually

Converts OST Calendars to vCal Individually

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.

Retains The Original Structure Of Meta-data And Folders

Retains The Original Structure Of Meta-data 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.

Maintains the HTML Formatting

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.

Display Preview OST Items

Supports Preview 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.

Recovers and Converts Inaccessible OST Files

Recovers and Converts Inaccessible OST 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..

Supports Convert OST | PST | NST Files [Technician]

Supports Preview OST Items

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.

Supports All Microsoft Outlook Edition

Supports All Microsoft Outlook Edition

The Outlook PST converter software supports all Microsoft Outlook, Windows and Exchange editions to export Outlook PST files.

Microsoft Outlook: Supports all versions Outlook 2016 // Outlook 2013 // Outlook 2010 // Outlook 2007 // Outlook 2003

Microsoft Exchange Server: Supports all versions 2016/ 2013/ 2010/ 2007/ 2003 (SP1, SP2, and SP3)

Microsoft Windows: Windows 11, 10, 8.1, 8, 7, Vista, XP

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Software Specifications

System
Requirement
Processor
Minimum Pentium Class
Operating System
Windows 10, 8.1, 8, 7, Vista, XP
Memory
512 MB Minimum
Hard Disk
50 MB of free space
Software
Delivery
Electronic
Yes
License &
Version
Single User License
Can use only on a single system
Corporate License
Can be used on '5' systems
simultaneously
Version
6.0
Interface
Available
Language Supported
English, German, French, Italian, Spanish
Download
Guides
Installation Guide    User Manual    Purchase Related FAQs

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Frequently Asked Questions (FAQs)

Yes, you can follow these steps to Convert OST to 25+ different file formats

  • Steps 1: Install and Run KDETools OST to PST Converter tool
  • Steps 2: Click on Add file (s) and Folders (s) button to Browse OST files migration.
  • Steps 3: The tool will start Scanning and analyses OST folders/items
  • Steps 4: Complete Display Preview of OST Items
  • Steps 5: Press export button to select the desired saving file format
  • Steps 6: Click on Convert Now button to start the Conversion process
  • Steps 7: Software successfully finished the process to displaying the complete message on the screen “Process Completed Successfully” and click OKAY” to finish the task.

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, 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.
Yes, the OST to PST Converter tool can individually Convert OST Contacts, Calendar by Selective using option.
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,The all in one tool support to directly upload OST to Office 365 mailboxes, Public folder, and Archive mailboxes with Mapping option.

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