Outlook Duplicate Remover





SysTools Outlook Duplicates Remover

An Amazing duplicate remover software to deal with duplicates in Outlook. Using this Outlook Duplicates Remover one can capable to remove duplicate emails, contacts, calendars, tasks, journals, notes from Outlook PST/OST/BAK files.

(Average Rating 3.6 Based on 249 Reviews)
  • Deduplication of emails, contacts, calendars, journals, tasks, notes
  • Options to delete duplicates within the folder and across the folder
  • Remove duplicates from MS Outlook according to multiple properties
  • Draw out duplicates from multiple Outlook PST/OST/BAK files at once.
  • Delete duplicates from Password Protected PST/OST/BAK files
  • Remove Outlook duplicates items between multiple Date Range
  • Support to remove duplicate items without MS Outlook installation new
  • Make report for unique & deleted duplicate items in .csv extension
  • Generate report in .txt of selected categories during the duplicate removing processnew
  • Outlook Duplicate Remover supports Windows 11 (64-bit), 10 (32-bit & 64-bit)

Free Live Demo - SysTools Outlook Duplicate Remover Fully Secured Download Version

Awards & Reviews of SysTools Outlook Duplicates Remover

An Advance Outlook Duplicate Remover for Your Ease

SysTools Outlook Duplicate Emails Remover Software

Best Software to Delete Duplicates from Outlook

Consequences of Duplicates in Outlook Mailbox

There are several reasons that make users remove duplicate items from Outlook. All of them are listed below:

  • Outlook Performance Degrades
  • Outlook Become Slower
  • Lower Productivity
  • Unnecessary Storage Space Issue

What All Advance Features Are Offered by SysTools Outlook Duplicates Remover Software?

  • Remove duplicates password protected PST/OST/BAK files
  • Option to select category and also you can exclude unwanted category
  • Delete all redundant items from MS Outlook mailbox
  • See all the listed PST files on the software interface along with its attributes
  • Add or skip Duplicate field properties as per your choice
  • Option to split PST/OST/BAK according to your preferred size

duplicate options

Two Ways to Delete Duplicates in Outlook

  • Remove Duplicates from Single Folder: If you want to find and clean up duplicate emails from same folder, check this option. Outlook Duplicate Remover will analyze each folder separately and remove all located duplicates. This option is useful when you do not want to delete duplicates across all folders of Outlook PST file.
  • Delete Duplicates Across Outlook Folders: If you think duplicates are distributed into multiple folders of PST file, go for the Across Folder(s) option. The software will analyze all PST file folders and eliminate duplicates from them. This option works best in the case where you need to remove duplicates from all folders of Outlook PST at once.

Delete Duplicates Via. Various Fields

Remove Duplicates from Emails, Contacts, Calendars, Tasks, Notes, Journals using various fields such as:


  • Subject
  • To
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  • Full Name
  • Email Address
  • Mobile Number
  • Job Title
  • Home Phone Number
  • Business Fax Number
  • Subject
  • Categories
  • Company
  • Birthday
  • Business Address
  • Business Phone
  • Location


  • Full Name
  • Email Address
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  • Mail Body
  • From
  • Cc
  • From
  • Recipient Name
  • Sender Email
  • Attachment
  • Internet Message-ID
  • Sent Date
  • Bcc
  • Transport Msg Header
  • Billing Information


  • Subject
  • Start Date
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  • End Date
  • Attachment/li>
  • Categories
  • Billing Information
  • Creation Time
  • To
  • Cc
  • Bcc
  • From
  • Location
  • Companies
  • Last Modification Time


  • Subject
  • Body
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  • Start Date
  • Due Date
  • Actual Work
  • Conversion Index
  • Categories
  • Companies
  • Status
  • Attachment
  • Billing Information
  • Creation Time
  • Conversion SysTools-Outlook-Duplicates-Remover
  • Last Modification Time


  • Body
  • Categories
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  • Subject
  • Creation Date
  • Size


  • Subject
  • Start
Read More
  • End
  • Attachment
  • Categories
  • Body
  • Creation Time
  • Entry Type
  • Billing Information
  • Company
  • Last Modification Time
  • conversion Type

various action

Different Action to Draw out Duplicates

  • Delete Permanently:This option will give you the facility to permanently remove duplicates from your PST/OST/BAK files.
  • Move to Deleted Item Folder: By opting this option one can move their duplicates items into deleted items folder in PST file.
  • Move to Folder:This feature gives you the option to create a folder in PST file to move all duplicate items into that folder.
  • Put Flag: It is a remarkable feature that helps to put a flag to your duplicate Outlook emails. So, you can take action at a later time.
  • Mark as Expire: Using this option you can mark as expire your duplicate Outlook PST/OST/BAK emails.

List of Key Features in SysTools Outlook Duplicates Remover

Handy Utility to Delete Duplicates from MS Outlook 2021 / 2019 / 2016 / 2013 / 2010 / 2007/ 2003


Batch Data Deduplication

The Outlook Duplicates Remover software allows you to eliminate the duplicates from multiple MS Outlook PST files at once. You can add a folder having multiple PST files in it and software will remove duplicates from each PST file as well as the folders in it.


Remove Duplicate Emails in Outlook

It is possible to cleanup the duplicates from all items within Outlook PST file. You can delete the duplicate items from emails, contacts, calendars, tasks, notes, journals. If required, you can check or uncheck the items for selective data deduplication.


Diverse Option to Remove Duplicate Items

While removing duplicate items such as Emails, Contacts, Tasks, Journals, Calendars, and Notes from Outlook. This duplicate remover tool provides various action to draw out duplicate items from Outlook PST file like Delete Permanently, Move to Deleted item folder, Move to Folder, Put Flag, and Mark as Expire.


Split Outlook PST File

This Outlook Duplicate Remover comes with the new feature which is Split PST File Size. With the help of this option, one can split the PST file size during the process of removing the duplicate from Outlook data file items. The maximum size limit to split the file is 200 GB.


Run the Tool Without Admin Privileges new

One of the most amazing feature of this tool is that one can run this tool without the admin privileges. It means if you are guest user and you want to run this tool, then you can easily use this tool to remove duplicate items from Outlook PST files.


Generate TXT Report for Selected Categoriesnew

This Duplicate Remover Tool will generate a .txt file that shows are the Categories you have selected during removing duplicate items from the Outlook PST file. Now, to view this report go to the selected destination location that you have selected during the process.


Preserve Meta Properties

Another impressive feature offered by Outlook Duplicate Remover software is that it maintains the accuracy and consistency of data and attributes during removing the duplicates from Outlook PST/OST/BAK files. You will get data in the same format with all its associated attributes such as to, cc, header, bcc, message size, etc.,


Maintain Folder Hierarchy

This Duplicate Remover Tool will maintain on-disk folder structure while draw out duplicates data items. After removing the duplicates, you will find the exact same on-disk structure of files in PST file, it will maintains folder hierarchy of files.


Show Deduplication Status

Once you add the PST files for data deduplication, it will show you the current status of each file. Now once the software starts removing duplicate items from Outlook folders, it will show you the status as complete with the number of items processed.


Supports Outlook 2021 & Below Version

Outlook Duplicate items remover support to the latest Outlook version. The tool clean up duplicate items from Outlook 2021, 2019, 2016, 2013, 2010, 2007, 2003. You can upload PST file of any Outlook version, the software will remove duplicate from all of them in few clicks.

Outlook Duplicates Remover Software Specifications
Download Outlook Duplicate Email Remover Software

Software Download

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Size : 8.95 MB

Version : 5.0

MD5 : 67dbbdbb5e687d52992c125f02499c5e

Trial Limitations

Trial version of Outlook Duplicate Remover software is capable to remove duplicates from 15 items per folder.

System Specifications

Hard Disk Space
100 MB of free hard disk space required

4 GB

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


Microsoft .NET framework 4.5 or above should be installed.

If you are using Windows 11/10/8.1/8/7, then please launch the tool as "Run as Administrator"

Supported Edition

Windows 11, 10, 8.1, 8, 7 (32 bit or 64 bit) & Windows Server 2008, 2012 R2, 2016, 2019

Outlook 2000, 2003, 2007, 2010, 2013, 2016, 2019, 2021 (32 / 64 bit Versions)

Product Guides

Software Guide Installation Uninstallation EULA


Electronic Delivery


Get an Overview of Outlook Duplicate Remover Features - DEMO and Licensed Version

Features DEMO Version FULL Version
Add Outlook Files & Folder
Preview List of PST Files
Select Categories (Emails, Calendars, Contacts etc.)
Remove duplicates within the Folder(s)
Remove duplicates across the Folder(s)
Windows 11, 10, 8 & All Other Previous Windows Version Supported
Export Duplicates Free Outlook PST File 15 Items / Folder
Cost FREE $29

Frequently Asked Questions

Listed Commonly Asked Questions and Answers

How do I get rid of duplicate emails in Outlook?

Outlook Duplicate Remover Preview

Step by Step Guide to Remove Outlook Duplicates:

  1. Free Download and Run Outlook Duplicate Remover
  2. Click on "Add File(s) or "Add Folder" to open PST file
  3. Select Category to Remove Duplicate Emails, Contacts, Calendars, Journals, Tasks and Notes
  4. 2 option to delete duplicate items: Within and Across Folder
  5. Browse Location to Save duplicate free PST file
  6. Click on Remove Duplicate button

SysTools Outlook Duplicate Remover is a very efficient and reliable tool which is capable of removing 'n' number of duplicate emails from a respective Outlook mail profile.

No, Outlook installation is not mandatory in order to use this tool. One can easily remove duplicate items from Outlook PST files without Outlook installation.

Yes, with the help of Add File(s) or Add Folder option you can upload a complete containing multiple PST files at once to the software. This way you can remove duplicate from multiple PSt files at once.

Yes, the tool removes duplicate emails from Outlook, as well as it eliminates calendars, contacts, journals, tasks and notes.

As a matter of fact, Outlook Duplicate Remover software checks for duplicates in both ways; within a folder and across folders for detecting all types of duplicate items such as; emails, contacts, calendars, etc.

No, there is no such file size related limitation within software. You can remove duplicates emails in Outlook from any size of PST file successfully.

No, Outlook Duplicate Remover software is built with advance algorithms that ensure not to modify source PST file. It rather creates a new PST file at a destination location of your choice with no duplicates.
Yes, the demo version of Outlook PST duplicate tool eliminates only 15 items per folder. If you want to delete more than 15 items, you have to purchase SysTools Outlook Duplicate Remover Tool.
Yes, Outlook duplicate calendar remover eliminates duplicate calendar items of MS Outlook version 2016,2013, 2010, and 2007.
There is no such file limitation for deleting duplicate items from PST files.
Yes, Outlook Duplicate contacts remover tool is capable to clean up duplicate items from Outlook 2021, 2019, 2016 as well as 2013, 2010, 2007, 2003. Also tool remove duplicate from PST without Outlook istallation.

What Customers Are Saying

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