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Outlook OST Merge Software

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SysTools OST Merge Software
Efficient Solution to Merge Multiple OST Files into One

(Average Rating 4.7 Based on 139 Reviews)
  • Combine multiple Outlook OST data files into a single File.
  • Merge 2 OST Files with All Items such as email, address book etc.
  • OST file combiner provides 3 option : Join OST Files, Merge OST Files & Merge Contacts Only. Read More
  • Merge unicode OST (MS Outlook 2016, 2013, 2010, 2007, 2003) & ANSI Data File (Outlook 2000, 2002) both.
  • Merge two ost files by removing the duplicate data optionally
  • No 2 GB file size limitation on Outlook OST file merge tool .
  • Option to Exclude Deleted Items while merging OST files.
  • OST Merge Utility allows to Generate Report in PDF or CSV File
  • MS Outlook Installation is Required to Combine OST File

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Free Live Demo - SysTools OST Merge software Fully Secured Download Version

Detailed Features of OST Merge Software

Instantly Join, Merge & Combine OST Files without any Duplicate Items

Join OST files

Merge Multiple OST Files

Combine Multiple Outlook data files into a single file of UNICODE type using OST Merge software. This application is built to provide the easiest way to merge multiple ost files or large number of OST files into single file for easily manageable storage. The software merges similar folders containing distinct OST files into a single folder. The tool also provides facility to split file during merging when merged OST file size exceeds.

Combine OST files

Options to Combine OST Files

The OST merge software provides multiple modes to merge two OST files in Outlook including : Join, Merge and Merge contacts option. Users can select any of the option to load OST files in it:

  • Join OST : This optiona allows users to combine OST File by creating new folder for merged OST as a single File
  • Merge OST : This Option allows users to merge similar folders into single
  • Merge Contacts : This option allows users to merge only Contacts within OST File as Read More


Combine ‘Contacts Only’ Folder

This particular option is provided for combining the ‘contacts only’ from various OST files processed by using the merging OST files tool. This software merge 2 OST Files to create a single PST having only integrated contacts into one and keeps the meta properties of the contacts together

Merge OST files in bulk

Merging Unlimited OST Files

There is no size limitation imposed on the quantity of data to be combined using OST Merge software. The tool provides 2 Options : Add File & Add Folder for combining multiple OST at once. Users can easily merge two OST files into one and the software performance would not be affected by the quantity. There is no limit on the size or quantity of Outlook OST files.

Exclude Deleted Items

Allows to Exclude Deleted Items

If users merge 2 OST files into one & do not want to combine deleted items folder of Outlook data files, then check the option to exclude deleted items option. The tool will not combine the deleted folders into resultant PST file and this will take less time during merging OST files.

Folder Option

Provide Add Folder / Files Option

The OST merge software offers ‘Add Folder’ option to merge two OST files or more than 2 at a time to integrate Outlook folders in bulk. Otherwise, if the user wants to add a single file at once, they can select ‘Add files’ option as per their choice.

Delete Duplicate Items

Exclude Duplicate Items

When merging Outlook OST files in bulk, users can customize the process for enhancing the procedure of Outlook OST file merge. Users are capable of excluding Duplicate Items as well as Deleted Items from being merged, or both while merging OST files.

Delete Duplicate Items

Reporting in PDF or CSV

Before merging OST file , the software provides option top create migration report in PDF. User need to check this option to generate a report after completion of Joining process. If the option is uncheck, by default a report will be generated in CSV File.

OST Merge Software Screenshots

Tool to convert Outlook 2011 to MBOX
Step 1: Install & Run Outlook OST Merge Tool
Maintain Folder Hierarchy
Step 2: Add OST & Choose to Join or Merge OST File
convert Outlook Mac to Thunderbird
Step 3: Choose to Remove OST Duplicates & OST Merging Report
Preview Export Report
Step 4: Successfully Combine OST File & Folders into One
Watch Live Video of OST Merge

Download Outlook OST Merge Software

Size: 23.5 MB Version: 3.0

Trial Limitations

Free Trial version of OST Merge Software will join only first two folders of each OST files & merge only 15 items of each folder of OST files

Download OST Merge Tool

Installation Uninstallation EULA

System Specifications

  • Operating System: Windows 10 & Below Versions
  • Processor: Intel® Pentium 1 GHz processor (x86, x64) or equivalent
  • Memory or RAM: Minimum 2 GB of RAM is required
  • Hard Disk Space: Around 100 MB of free hard disk space

Application Prerequisites

  • Microsoft Outlook must be installed and must be configured properly for any valid or dummy profile/account.
  • If you are using Window 10/8.1/8/7 or Vista, then please launch the tool as "Run as Administrator".
  • To Import Merged OST into Active / Existing Outlook Profile Read More

Supported Editions

  • Microsoft Windows – Windows 10, 8.1, 8, 7, Windows 2008/ 2012 Server (32-bit & 64-bit)

Additional Software

  • Microsoft .NET framework 4.5
Frequently Asked Question

Can the software identify the duplicate entry while merging OST files?

What are the options to combine OST files offered by the OST Merge?

Is it possible to combine data in bulk from multiple Outlook OST files into one?

Does the Software support to Merge Two OST Files into Single File

Get an Overview of OST Merge Features - DEMO versus Licensed Version

Features DEMO Version FULL Version
Add OST Files & Folder
Remove duplicate Emails
Exclude Deleted Items
Generates Export Report in PDF & CSV
Join OST Files Join First 2 Folders All Items
Merge Outlook OST Files Merge First 15 Items/ Folder All Items
Merge Outlook Contacts Merge First 15 Contacts All Items
Cost FREE $39
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Full Version



SysTools OST Merge Tool






OFFER Valid Till 20th June

OST Merge + PST Merge




$78   $49

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Note: The final price of software may be subject to sales tax depending upon your residence. The "Estimated Sales Tax" is displayed at the time of Check Out when you confirm the order.

Software will get delivered on your registered email id, within few minutes after placing the order.

Electronic Delivery: The delivery of 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.

Purchase Order: You can place the order via Purchase Order(PO) Click Here

amazon        CR        NSIC         CIO       BBB
License Information Personal License Business License Enterprise License
File Limitation Merge Unlimited OST Files Merge Unlimited OST Files Merge Unlimited OST Files
Bulk Conversion Support
24×7 Technical Support Unlimited Unlimited Unlimited
1 Year Free Product Updates
30 Day Money Back* Yes, Money is refundable Yes, Money is refundable Yes, Money is refundable

Features in Demoware & Commercial License

An Overview At The Contrast between Trial & Purchase License

OST Merge DEMO Version FULL Version Bundle Offer
Add OST Files & Folder
Merge OST Contacts
Merge OST File Merge First 15 Items/ Folder
Join OST File Join First 2 Folders
Merge OST Contacts Merge First 15 Contacts
PST Merge
Add Files & Folder
Join Outlook PST Files
Merge Outlook PST Files
Merge Outlook Contacts

Frequently Asked Questions

Listed Commonly Asked Questions and Answers

What Clients Say

I was in trouble to manage multiple Outlook OST files from home machine or Office. Also, it takes a lot of time, which become quite irritating for me. All of sudden, one day, one of my friend advised me to download Outlook OST File Merge tool to combine multiple Outlook OST files into one . It was an awesome experience for me. It can easily Merge OST files of larged size also, and it will get easy and simple for me to handle and club multiple OST file items

Edward Copeland, US

Thankfully, I was not running from pillars to posts in order to get the best solution in the online marketplace. I simply searched the web for a product that can merge multiple OST file and found OST File Combiner software a large number of suggestions. Now because its functions suited all my criteria, I was able to make decisions quickly and efficiently. Great OST Merge Tool

Julio Alexander, Spain

Amongst all applications, I found OST Merge Software the most suitable and relaible tool. It was probably the right decision. This application made it very simple for me to get all the data merged into a single file that too of Unicode formatting which allowed me to have storage facility. Thank you so much

Joan Frazier, Italy

I always thought that to combine multiple Outlook Data file was a very difficult process. However, Outlook OST Merge Software has completely changed my thinking. I can easily merge unlimited OST files with the help of this reliable tool . I must say, the interface and the performance of this software is too quick and accurate to merge 2 OST File into one . Kudos to the whole team of developers.

Robert Medina, London

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