OST File Splitter



OST File Splitter

OST File Splitter will help you out in the situation, if your OST file has reached maximum size or the OST file is bigger than mailbox size. The splitting process can be initiated with any attribute like size, date, folder, email id, category or year from the given multiple options.

  • Split OST File by Date, Size, Year, Folder, Email ID, Category
  • Split Large Size OST File into Multiple PST Files
  • Separate Entire OST Data Including Contacts, Emails etc.
  • Allow to Split Fresh Created OST & Archived OST as Well
  • It is Not Mandatory to Install Outlook to Truncate Large OST File
  • Add OST File, Folder or Search OST Files from Local Drive
  • Run the tool as a Standard / Guest user without requesting administrative privileges
  • Compatible with Windows 11, 10, 8, 7, Windows Server 2022, 2019, 2016, 2012 R2, 2008

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OST File Splitter – Overview

Introduction to OST File

OST File: OST file (.ost) is solely related to MS Outlook. Whenever Outlook is configured with Exchange Server, then the Outlook data file stored locally is in OST file format. OST file facilitates users with the Offline access of Outlook mail accounts, It gets synchronized after getting internet connection. You will find OST file at this location on your system.

Why Split OST File?

If your OST file keeps growing and not getting smaller then it may cause corruption or lead to multiple errors like as:
-- Cannot load or open the OST file.
-- Not able to add new data to OST file.
-- Not able to synchronize the OST file with Exchange Server.
-- Various errors during the synchronization process.

Effectual Features of OST File Splitter

Some Highlighted Features to Split OST File by Date, Size, Year, Folder, Email ID, Category

Break Large OST File

Separate Huge OST File

OST File Splitter allows you to split Outlook Offline data file into different small size .ost files. OST File Splitter will break down the OST file into small size PST files. Along with that the meta part like Cc, Bcc, to etc. remains intact.

Divide OST Data

Choice to Divide OST File as Folder

In case of the folder basis, the OST Splitter Software enriches you with the creation of a single file for each required folder present in Outlook .ost file. You can also split the archive OST file.

Based on Size

Permits to Truncate OST File by Size

The tool facilitates you with the option to set a size limit for your resultant file. Suppose, you have an OST file of 20GB and has set size 1GB then you will get 10 PST files each of 1GB.

Based on Year

Option to Split OST File by Year

If you are suffering with an OST file containing data of many previous years. And you want to get the data of some particular years as per your requirement. Then you can select this option, you will get different PST files for every year.

Split OST by Date

Facilitates with Splitting OST File by Date

If your OST file has reached maximum size, the software allows you to truncate that OST file on the basis of date. You just need to set a date on given option and you will get the data till that date in the form of separate PST files.

New Folder

Save Resultant OST Files at Desired Location

After breaking down the .ost files, the Outlook OST file Splitter will provide the option to save the output data files to desired location. With the use of this utility, there will not be any affect on the original structure of OST file even after split.

OST File Splitter Tool System Requirement

Software Download

Size: 26.1 MB

Version: 5.1

MD5: 5419d6b5f486a0184f8c83cdffadee67

Trial Limitations

Demo of OST File Splitter only split first only 50 Items of OST file.

System Specifications

Hard Disk Space
100 MB of free hard disk space required

4 GB of RAM

Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz 2.39GHz

Supported Editions

Windows 11 (64 bit), 10, 8, 7 (32 bit or 64 bit) and Windows Server 2022, 2019, 2016, 2012 R2, 2008.


  • Microsoft .NET framework 4.5 or above should be installed.


Q. Is your Antivirus blocking the software export process?

A. Please disable Anti-virus temporarily / Allow access (Whitelist) from Antivirus settings for proper working of the software.

Q. Unable to Create Output in destination?

A. Please avoid NAS, SAN, Network or Shared Drive. Source file should be on the migration machine to perform successful conversion.

Electronic Delivery

The delivery of the product is automated, You will receive an email containing both the link to download the product and the activation key within few minutes after payment confirmation.

Features Comparison

Get an Overview of OST File Splitter Features – Free and Full Version

Features FREE Version FULL Version
Add OST File(s) / Folder
Search OST Files
Split OST by Date, Size, Year, Folder, Email ID, Category
Exclude Deleted Items
Windows 11, 10, 8, 7 (32 bit or 64 bit) and Windows Server 2022, 2019, 2016, 2012 R2, 2008
Split OST File First 50 Items All Items
Cost FREE $49

Frequently Asked Questions

Listed Commonly Asked Questions and Answers

No, there is not any limitation, you can split older OST file on the basis of date as well as year.
No, You can split OST file of any size.

What Customers Are Saying

Verified Purchase Reviews – OST Splitter Tool

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