Outlook Duplicate Remover





SysTools Outlook Duplicates Remover

Remove Outlook duplicates to reduce mailbox size and increase MS Outlook performance with work efficiency. SysTools Outlook Duplicates Remover is an amazing tool to remove duplicates.

(Average Rating 4.1 Based on 321 Reviews)
  • De-Duplication 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
  • Multiple Actions for Duplicate Items: Deleted Permanently, Move to Folder Etc.
  • Draw Out Duplicates from Multiple Outlook PST, OST, BAK Files At Once
  • Include or Exclude Folders while Removing Duplicate Items from Outlook
  • Option to Easily Remove Duplicates of Selected Categories Items
  • Draw out Outlook Duplicates Items Between Multiple Date Range
  • Supports to Remove Duplicate Items without MS Outlook Installation new
  • Make Report for Unique & Deleted Duplicate Items in .csv Extension
  • Outlook Duplicate Remover Supports Windows 11 (64-bit), 10 (32-bit & 64-bit)

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

Also Avaialble for Mac OS

SysTools Outlook Duplicate Remover Software

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

  • Add PST file in bulk using software files or folder mode.
  • Search File option to add file from any drive of your system.
  • Easily remove not required file from de-duplication list
  • Option to clear the entire list added mistakenly.
  • Exclude checked emails, trash folder for de-duplication.
  • Save resultant file at desktop location by default.
  • Provision to change the destination location from software.
  • Remove email duplicate on the basis of 14 email properties.
  • 14 properties available to remove duplicate contacts.
  • Remove calendar duplicate using 13+ calendar properties.
  • Draw out Task duplicate on the basis of 14 task properties.
  • De duplicate Notes redundant using 5 Notes properties.
  • Use 12 Journals properties to remove duplicate from journals.
  • Date Filter to remove old and current duplicate data.
  • 5 Action that can be taken on duplicate items.
  • TXT report of selected categories in de-duplication process.
  • Delete duplicates from Password Protected PST/OSTfiles.
  • The tool supports ANSI and UNICODE Outlook data files.
  • Remove duplicates from Outlook archive file easily.
  • Preserve meta and folder hierarchy during de-duplication.
  • Maintains data integrity during duplicate removal process.
  • Support all the versions of Outlook including Outlook 2021.
  • Option to split large PST file by 10 MB to 200 GB.
  • Generate a report of success count after de-duplication.
  • Standard user can run the tool without Admin Privilege.
  • Navigate to the destination location direct from software.

Awards & Reviews of SysTools Outlook Duplicates Remover

An Advance Outlook Duplicate Remover for Your Ease

SysTools Outlook Duplicate Remover Software

Best Software to Delete Duplicates from Outlook

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. It 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. It is usable to remove duplicates from all folders of Outlook PST at once.

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 to put a flag in 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 Various Data Items Properties

Remove Duplicate Data Items Using Various Properties in MS Outlook 2021, 2019, 2016, 2013, 2010

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 remove duplicates from multiple Outlook PST/OST files at once. You can add a folder having multiple PST, OST files in it and software will remove all duplicates items from each file.


Find PST Files on Disk

This Outlook Duplicate Cleaner software provides Search feature to find out Outlook PST & OST file in the local hard disk. You can either find Outlook data files in a individual logical drive (C: D: E:) or all drives at once for duplicate removal process.


Remove Duplicate Emails & Other Items

It is possible to clean up the duplicates from all items within Outlook PST/OST file. You can remove duplicates emails in Outlook as well other items: contacts, calendars, tasks, notes, and journals using multiple properties.


Dual Mode to Remove Duplicates

The tool has two mode for duplicate cleaning method. Within Folders mode is preferable to remove duplicate within a single folder. Across Folders mode preferable for removing duplicates across the selected PST/OST folder.


Include/Exclude Any Folder/Category

On the software interface, there are provisions to include required folders or specific categories for duplicate erasing process. Not required folders (Junk/Spam/Deleted Items etc.) and categories can be excluded from duplicate cleaning process.


Multiple Actions to Remove Duplicate Items

This outlook duplicate email remover tool provides various actions to remove duplicate items from Outlook PST, OST file like Delete Permanently, Move to a Folder or Deleted item folder, Put Flag, and Mark as Expire.


Reduce Outlook Data File Size

This Outlook Duplicates remover software comes Split PST File option. So, one can reduce the PST/OST file size size during the process of removing duplicate from Outlook data file. The maximum size limit is by 200 GB to split the file.


Multiple Date Filter

The tool comes with a Date Filter option. This date filter option gives users a flexibility to delete duplicate from any date range. In fact users can add multiple date ranges and remove duplicate between that specific data range.


Preserve Meta Properties

Outlook duplicate remover software maintains the accuracy of data and attributes during removing the duplicates. You will get same data with all its associated attributes such as to, cc, header, bcc, message size, etc. in resultant file,


Maintain Folder Treenew

This Duplicate Remover Tool will maintain PST/OST folder structure while draw out duplicates data items. After removing the duplicates, you will find the exact same folder structure in resultant PST/OST file.


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.


Generate TXT/CSV Reports

This Duplicate Remover Tool will generate a .txt file report that shows the criteria you have selected for removing duplicate items from the Outlook PST/OST file. It creates CSV report having duplicate counts, export counts, failed counts, and failed items list.


Run With/Without Admin Privileges

One of the most amazing feature of this tool is that admin/standard/guest users can run with admin rights. However if standard/guest users don't have the admin rights can run the tool without admin privileges.


Supports Outlook 2021 & Below Version

Outlook Duplicate items remover supports latest Outlook version. The tool remove duplicate items from Outlook 2021, 2019, 2016, 2013, 2010, 2007, 2003. You can upload PST file of any Outlook version to remove duplicate in few clicks.

Outlook Duplicates Remover Software Specifications
Download Outlook Duplicate Email Remover Software

Software Download

Size : 18.8 MB

Version : 5.1

MD5 : f2f4ef5db8378ec8624a35a77c066671

Trial Limitations

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

System Specifications

Hard Disk Space
Minimum 100 MB of free hard disk space

4 GB is recommended

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 (64-bit), Windows 10/8.1/8/7, then please launch the tool as "Run as Administrator".

Windows 11, 10, 8.1, 8, 7 (32 bit or 64 bit) & Windows Server 2008, 2012 R2, 2016, 2019, 2022

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

Supported Editions

  • Microsoft Windows 11 (64-bit), Windows 10, 8.1, 8, 7 & Windows Server 2008, 2012 R2, 2016


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 $49

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. Download and Run Outlook Duplicate Remover.
  2. Choose "Add File(s) or "Add Folder" to add PST file.
  3. Selet any: Within and Across folder to delete duplicates
  4. Select Category to Remove Duplicate data items.
  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.
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
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

SysTools Outlook Dupliacte Emails Recovery Software Verified Purchase Reviews

321 Ratings
5 Star
4 Star
3 Star
2 Star
1 Star