Outlook Duplicate Remover v2.0

Tool to Remove Duplicate Outlook Emails, Contacts, Calendars from PST Files

User Ratings :   (Average Rating 4.7 Based on 51 Reviews)

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Outlook Duplicate Remover

Norton Seal windows 10 compatible

Lifetime License Validity

SysInfoTools Outlook Duplicate Remover is the perfect tool to delete duplicate mailbox items including emails, contacts, calendars, journals, etc. from Outlook PST file. With the PST Duplicate Remover Tool users can easily reduce the size of MS Outlook PST Files without any effort. The tool entirely removes all duplicates from source PST file and helps in reducing the PST file corruption. Once all the duplicate mail items removed from your MS Outlook profile, you will observe that your PST mailbox become lighter and performance of Outlook gets increased.

  • Supports multiple Outlook PST files at a time & Date Range Feature.
  • PST duplicate remover provide Multiple Options to remove copied PST items.
  • Provides the feature of comparison criteria for removing PST duplicate items.
  • Creates a complete new PST file in which no duplicate items are stored.
  • Displays the file specification of selected PST file (if single) automatically.
  • Previews the mailbox data of selected PST file (if single) in a perfect tree structure.
  • Provides option for searching duplicity of items in same folder or across PST file.
  • Free Outlook Duplicate Remover Tool successfully delete first 25 PST files.

Demo Limitations - Trial version will remove duplicates from first 25 mail items of selected PST files

Key Features of Outlook Duplicate Remover Software

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Outlook duplicate remover
Safe, Quick, and Flawless

PST Duplicate Remover is a quick in removing duplicate PST items. The Tool can delete multiple duplicate mailbox folders in a single go. It successfully finds PST Files and removes all the duplicate items from MS Outlook. Outlook Duplicate Remover is also very safe to use, it safely scans PST Mailbox in read only mode and does not harm any PST file.

Outlook duplicate items remover
Multiple Options to Remove Duplicates

Being multifunctional, this software provides you with various option to remove duplicate items. With this tool, users get options like Delete permanently, Mark as expired, Move to deleted folder, Copy to Sub folder, Move to sub Folder, Put Flag, and many other options. Users can then select the options as per their preference and can remove the copied PST files with great ease and effectiveness.

duplicate emails in Outlook
Batch Removal of Mail Items

The software effectively removes duplicate mail items from single and multiple Outlook PST files in one sitting. With this feature, you can either select multiple PST files from your system or you can search them using its search feature.

Displays File's Information
Displays File’s Information

The PST Duplicate Remover Tool allows users to see file specification of the selected PST. The File Specification is displayed in the right pane of the window, which includes file name, file size, file type, total number of email items, and total number of folder inside the selected file.

Advanced Search
Advanced Search feature

SysInfo PST Duplicate Remover is enhanced with all useful features so that anyone can handle it with great ease. You can use the "Search Option" to find your Outlook PST files from system directories. Users can search the duplicates items in the same folder or search duplicates items across the PST file.

Adding PST file
Adding PST file(s) to Outlook

This software lets you add the newly created PST files to Microsoft Outlook profile directly with ease. With this option, users can access all the newly added PST data in their current Outlook Profile; there is no need to create separate Outlook profile to view the filtered mail items.

remove Outlook duplicates
Comparison Criteria Selection

This is an incredible option within the Outlook Duplicate Remover that allow users to select single or a group of fields to compare items. Users can select options including Text, Subject, Sender Email, etc. which they want to remove the duplicity from the chosen PST file. Based on the selected fields, the Software will compare items and mark them as duplicate.

Date Range Filters
Date Range Filters

With this Outlook Duplicate Item Remover, users can delete duplicate items falling in specific date range either by choosing the option 'Select predefined period' or 'specify period manually' This feature enables the users to filter and save only required PST email data.

Supportability and Compatibility
Supportability and Compatibility

The PST Duplicate Remover Software has a wide range of supportability to all major versions of MS Outlook and high compatibility with all popular Windows operating systems. Software smoothly runs on all Windows-based platforms including the latest Windows 10 and by all major versions of Microsoft Outlook like 2002, 2003, 2007, 2010, 2013, and the latest, 2016.

User-specific Saving
User-specific Saving

While deleting duplicate emails & other items from the PST files, users have the option to choose a desirable location tool. Also, if required you can make a new folder to save the output files in it. This tool provides options to remove the duplicity of items in the original PST file by choosing option from dropdown list or you can create new PST file(s) at user-specific location for saving output.

Important Note: Make sure that your PST file is not password protected or corrupted

Why should you remove Outlook duplicates?

If you use Outlook client in your day-to-day life, you must send/receive hundreds and thousands of email messages every day, causing you to have a large mailbox. Being a regular Outlook user, you must know that a PST file has a certain size limit. If you're using any old Outlook version, i.e. Outlook 97 to 2002, the file is saved in ANSI format which has a maximum size limit of 2 GB. It can only store up to 2 GB of mailbox. Outlook 2003 and later versions save PST file in a new format, called Unicode which has maximum size limit of 20 to 50 GB. Whenever a PST file is reached to its maximum size, Outlook users face severe issues and problems related to Outlook performance. But if the mailbox size goes beyond its limit, PST file becomes prone to corruption. You should make sure that a PST files never reaches to its maximum size.

Duplicate items in Outlook cause large mailbox

The most common reason behind a large mailbox is duplicate items. Have you ever seen a duplicate item in your PST file? Do you know what a duplicate item is? It can be anything including an email message or a contact. Think you're having 1000 email messages in your Inbox folder, 100 KB each. In this way, the total size of your Inbox folder should be 100 MB. But, if you have 500 duplicates of those email messages, it increases your mailbox size from 100 MB to 150 MB. You might have thousands of duplicate items in your Outlook mailbox, so you must remove Outlook duplicates to make your PST files handy, so that you can avoid Outlook corruption.


Comparison of Trial & Full Version

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Product Features Free Version Full Version
Select single as well multiple PST file at a time
Display PST file information
Select comparison criteria options
Tree structure preview of mail items
Provides Search options for duplicates items
Remove Outlook Duplicate Items First 25 Emails Only All
24*7 Tech Support & Secure 100%
Price FREE $29
Money-Back Guarantee Download Buy Now
Specifications of Outlook Duplicate Remover Tool
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Outlook Duplicate Remover

Norton Seal windows 10 compatible

Trial Limitations

Demo version comes with one limitation, i.e. you can remove duplicates items from first 25 emails of each folder of selected PST file(s). This is the only limitation in demo version. To overcome this limitation, you need to purchase the full licensed version.

Basic Requirements
  • Pentium class processor
  • Minimum 512MB RAM (1GB recommended)
  • Support Windows 10/8.1/8/7,2008/2012(32 & 64-bit)
  • 50 MB Software installation
  • Disk Space - Enough space to store recovered output
  • Support MS Outlook 2016/2013/2010/2007/XP/2002 2000/97or below version (32 & 64 bit)

Testimonials   |   EULA   |   Customization Plan

software error

software error


Frequently Asked Questions

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I'm running Windows 10 on my system. Will your software continue to work?

Yes, our Outlook PST Duplicate Removal tool offers high compatibility with all popular Windows operating systems including Windows 10. Windows 8, Windows 7, Windows Vista, Windows XP, Windows 2008, 2003, 2000, NT and 98.

Which duplicate items can be removed from the Outlook PST files using this tool?

The Advanced Outlook Duplicate Remover tool of SysInfoTools Software can remove all your duplicate items from Outlook PST files which includes email messages, contacts, calendars, notes, tasks, attachments, etc.

Can I remove duplicate items from corrupted PST files?

No, this tool does not support corrupted PST files. If your Outlook PST files are corrupted, you cannot use this tool or removing duplicate items from them. Make sure that your Outlook PST files are neither corrupted nor password-protected. You can also try our advanced Outlook PST Repair and PST Password Recovery tools to repair corrupted PST files and to remove password or unlock PST files respectively.

Does the software support multiple PST files at a time?

Yes, the Outlook Duplicate Remover Tool supports single as well as multiple PST files simultaneously. You can select either single or multiple PST files at a time. This tool also allows you to search the PST files in your computer system if you choose multiple files selection option.

Does the software alter or modify the original Outlook PST files?

The tool provides you with an option that will allow you to remove the duplicate items from the original selected PST files or you can save the output into a new PST file at user-defined location. If you save the data into a new file, the original selected PST file(s) will remain intact or unchanged.

My Outlook PST files are saved in ANSI format. Can I use this tool?

No matter what format your PST files are saved, i.e. either ANSI or Unicode, this tool supports Outlook PST files of both formats (ANSI and Unicode) which are created in any version of MS Outlook, i.e. from MS Outlook 97 to MS Outlook 2010 & 2016.

What is the difference between the demo version and licensed version of the software?

The difference between the demo and licensed version of this tool is that the demo copy of Outlook duplicate removal tool will allows you to remove duplicates items from the initial 25 email items of each folder of specific selected PST files. You can purchase the licensed version of PST Duplicate Remover Tool To overcome this limitation.

Is there any need for MS Outlook to be installed in the machine if I execute this software?

Yes, you need to install MS-Outlook on your system to execute PST Duplicate Removal Tool.

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Client Reviews

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After converting my large OST files into PST, I found the duplicate data in the PST files. I tried to remove the duplicate data manually, but due to the large number of PST files, it was difficult to remove all of them. After all my efforts, I decided to use a duplicate remover and found this unique solution. I am very happy to use it, thanks!

- Janet James, Italy

It is an easy and fast way to remove duplicate data from Outlook. Also, I am fully satisfied with the SysInfoTools efforts and customer support.

- Jimmy Powell, China

I was very confused to find the duplicate data because I have 1000+ files in my Outlook. However, with SysInfoTools' Duplicate Remover, I could select and delete the duplicate data. Thanks guys for this solution.

- Carolyn Allen, Moscow

SysInfoTools' Outlook Duplicate Remover provided many unique features at a cheaper price and that's why I've selected this from all others. Selection of comparison criteria, displays file's information in a single pane, and data range attracts me more. Rated - 5 stars!

- Henry Clark, Paris

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