SysTools OST Splitter

Split Oversized Outlook OST Files into Smaller PST file

(Average Rating 4.1 Based on 177 Reviews)


OST Splitter Tool





Split Oversized Outlook OST File Without Any Data lapse

  • Split oversized OST file into multiple parts by Date, Size, Year, Folder, Email ID, Category
  • Option to Repair Corrupted Outlook OST files before splitting
  • Allows user to split OST files without any file size limit into UNICODE PST file
  • Option to Add Single / Multiple Files or Add Folder or Search Files
  • Tool provides option to break OST data items like emails, contacts, etc
  • Supported running the tool as Standard/Guest without Admin Privilege
  • Allows splitting newly created OST file & archive OST file
  • Outlook Installation is Not Required to divide OST file which is huge in size

Free Live Demo - SysTools OST Splitter Fully Secured Download Version

Awards & Ratings of SysTools OST Splitter Software

OST Splitter Tool to split oversized OST file

Awards & Reviews

Software Reviews

Key Features of OST Splitter Software

Truncate Outlook OST

Truncate Outlook OST File Large in Size

Outlook OST file splitter permits the user to split the .ost file of any size into multiple smaller parts. Also, it is possible to break UNICODE as well as ANSI OST files without losing a single bit of information. Moreover, the tool keeps Meta properties like To, Cc, Bcc, etc., remains intact after the process completion

Break OST File

Option to Break OST File as Folder

On a folder basis, the user can divide multiple .ost files in Outlook 2010 & 2013 versions. The OST splitter software allows to create a single file for each desired folder available in Outlook OST file and moreover divide the particular folder by size as per user choice. Also, a user can split archive OST file.

Split OST File

Allows To Split OST File By Size

With this option, user can easily reduce OST file which is oversized into multiple parts, using the same size for each file. OST splitter software will reduce OST file of Outlook into multiple segments according to the mentioned file size range. The tool cannot support to break OST files that are already corrupted due to a large size.

Divide OST File

Option to Divide OST file by Year

If user wants to reduce OST file size according to year, then, use this 'split OST by year' option to break OST file large data yearly. The Outlook OST splitter software will allow to create a separate OST file on the basis of the year. Suppose, if a user has selected year from 2017 to 2020, then, they will get 4 files separately. Each file will have data of a single year within it.

Split Oversized OST File Outlook

Facility to Break OST file Data By Date

On the basis of specific date, users will capable to truncate Outlook OST file data by date. From OST splitter software, the user can decide a particular date and will break OST file of Outlook. In First one file, will contain the items 'of and prior' to the defined date and another will includes the data ‘after’ that date.

Split OST by Email ID

Split OST by Email ID Option

Outlook OST File Splitter tool allows reducing OST files by email ID. Using this function, you can use all the email options specified in the emails as “From”, “To”, “Cc” or “Bcc” to generate a new Outlook OST file. Using this tool, users can split OST files by presenting CSV files with multiple email IDs in Microsoft Outlook OST emails.

Split Oversized OST by Category

Option to Divide OST by Category

Using this OST splitter software, you can split Outlook OST file by category. The tool provides several category options such as job, calendar, contacts, notes, tasks, and diary. The user can select one or more categories by selecting the desired option check mark.

Save OST File

Make a New folder to Save OST File

Using OST Splitter Software, user can easily break OST File Oversized data into smaller parts without affecting the original structure of the source data file. After splitting, the tool will create a new folder to save the files in a customized way. By default, the .csv file will also be saved at the similar location.

SysTools OST Splitter Software Specifications

Software Download

Size :27.8 MB

Version : 6.0

MD5 : 10a3d98499edf2e093aed326c22f6bec

Software Limitations

Demo Limitations
Demo version of OST Splitter Tool allows users to Split first only 50 Items of OST file

System Specifications

Hard Disk Space
100 MB of free hard disk space

4 GB of RAM (4 GB Recommended)

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

Operating System

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

Application Pre-

   Microsoft .NET framework 4.5 and Above Version



Electronic Delivery


SysTools OST Splitter Software Order Now

Get an Overview of OST Splitter Software Features - DEMO and Licensed Version

Features DEMO Version FULL Version
Browse Outlook OST File
Select Outlook Format(ANSI or UNICODE)
Advanced Split Options(Date, Size, Year, Folder, Email ID, Category)
Preview Split Information
Exclude Deleted Items
Previous OST to Splitted OST
Split Large Outlook OST File Split First 50 items All Items
Cost FREE $49

Frequently Asked Questions

Listed Commonly Asked Questions and Answers

Does this software split Outlook archive Files without losing any data?

I have already used archive folder of Outlook to reduce OST file size to improve the performance of email application. At present, I want to break this archive folder to manage the data accurately. Therefore, I want to know that can I split Outlook archive folder with the help of this utility?

Free download

Yes, OST splitter software helps to break Outlook archive data folder. In addition, it offers four options such as folder, year, date, or by size to perform the splitting on the same file.

From past years, I am using MS Outlook, and now I want to split oversized OST file Outlook 2013. Therefore, I want to know that Is there any file size limitation imposed with Outlook OST splitter tool?

There is no file size limitation imposed on Outlook Compact OST File software. Further, user can even use ‘Split OST file by year’ option to break archive OST file on the basis of each year.

What Clients Say

SysTools OST Splitter Software Verified Reviews
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