Outlook Duplicate Items Cleaner
PST Duplicates Remover Software
PST Duplicates Remover finds repeated emails, contacts, calendars, tasks, notes and journals in PST, OST and BAK files and cleans them in one pass. Choose the fields that define a duplicate and decide what happens to the extra copies.
- Six Outlook item types in one scan
- Within folder and across folder search
- Delete, move, flag or mark as expired
- Works on Windows 11, Windows 10 and Mac
- Free DemoTest before you buy
- 30 Day RefundDemo test comes first
- Card or PayPalHosted store checkout
- Fast License KeySent by email
- 24x7 SupportChat and email
1Is this my case?
Which Cases Need a Duplicate Cleanup?
Find your case below. RecoveryTools software cleans repeated Outlook items without the manual work.
- Same Email Appears TwiceOutlook shows two or three copies of one message and the folder grows for no reason.
- Merged PST Files Doubled EverythingJoining archives left repeated mail, contacts and calendar entries behind.
- Import Ran Two TimesAn interrupted or repeated import copied the same items again.
- Contacts and Events RepeatAddress book and calendar hold the same people and meetings more than once.
- PST File Hit the Size LimitExtra copies push the file toward the size where Outlook slows down.
- Shared Folders Hold CopiesSeveral people saved the same mail to different folders.
Six Item Types
Mail, contacts and more all go through the scan.
Three File Types
Add one file, a folder of files or search a drive.
You Choose the Action
Delete, move, flag or mark as expired. Keep one copy or none.
Copy the PST file to a safe folder before you apply a permanent delete action.
Moving duplicates to Deleted Items or to a folder you select leaves a way back if the criteria were too wide.
2What changes?
What Changes After the Cleanup?
Before
- Same item stored many times
- PST file grows without reason
- Manual search eats hours
After
- One copy of every item stays
- PST file shrinks to real size
- Cleanup finishes in one session
3What can it do?
Which Features Come With the Duplicates Remover?
Set the files, the criteria and the action from one window.
Six Item Types
Cover notes, tasks, journals, calendars, contacts and emails in a single scan.
Two Search Modes
Look for copies within one folder or across all selected folders.
Custom Duplicate Criteria
Tick the fields that make two items duplicates, 14 fields for mail alone.
Five Actions
Delete permanently, move to Deleted Items, move to a folder, flag or mark as expired.
Bulk File Support
Add many files together, protected or not, ANSI or Unicode.
Date Filter
Check items from a chosen start date to an end date.
Split Output PST
Cut the cleaned PST file into parts from 10 MB to 200 GB.
No Admin Rights
Use a standard user account without Outlook installed.
CSV or TXT Report
Save a record of every item that was removed.
4Is it easy?
How to Try the Cleanup in 4 Steps
Test the cleanup on a copy of your PST file in the free demo. Buy the license once the result looks right.
- 1Download
Install the Demo
Download the 21.7 MB Windows installer or the 61.9 MB Mac installer and open the software.
- 2Add
Add Your PST Files
Click Add File(s), Add Folder or Search Files. Choose Within Folder(s) or Across Folder(s) and click Next.
- 3Set
Choose Items and Criteria
Tick the item types on the Filter tab and click Specify Duplicate Criteria. Add a date range and choose the action.
- 4Clean
Start the Cleanup
Click Dedupe to process the files. Demo mode stops at 15 items in every folder and a license removes that limit.
Screenshots of every step sit in the duplicate removal guide.
5What will I see?
Which Screens Does the Duplicates Remover Show?
Follow the path from adding files to the final action.
Add Files or Folders
Load PST files from the Add tab.
Choose Within or Across Folders
Decide where the software looks for copies and click Next.
Set the Duplicate Criteria
Tick the mail fields that must match and click Save.
Choose the Action
Select what happens to duplicates and keep one copy or none.
6Demo or full?
Free Demo vs Full Version
See where the free demo stops and what a license adds.
| Feature | Free Demo | Full Version |
|---|---|---|
| Six item types | Yes | Yes |
| Within and across folder search | Yes | Yes |
| Custom duplicate criteria | Yes | Yes |
| Date filter | Yes | Yes |
| Report in CSV or TXT | Yes | Yes |
| Items cleaned per folder | 15 | All |
| Price | Free | From $49 |
7Will it fit my system?
System Requirements for the PST Duplicates Remover
| Product Version | 6.0 |
|---|---|
| Download Size | 21.7 MB for Windows and 61.9 MB for Mac |
| Product Type | Desktop software that removes duplicate items from Outlook data files |
| Input Files | PST, OST and BAK files, protected files included, ANSI and Unicode |
| Item Types | Emails, contacts, calendars, journals, tasks and notes |
| Windows | Windows 11 (64 bit), Windows 10, Windows 8, Windows 7 and Windows Server 2019, 2016, 2012 R2 and 2008 |
| Mac | Intel and Apple Silicon Macs, with OLM and Mac PST support |
| Outlook | Works with Outlook 2000 to 2024 files and does not need Outlook installed |
| RAM and Disk Space | 4 GB RAM and 100 MB of free disk space |
| Pre Requisite | Microsoft .NET Framework 4.5 on Windows |
| User Rights | Standard user account, no admin rights needed |
| Demo Limit | 15 items per folder |
8What is the price?
How Much Does the Duplicates Remover Cost?
Choose the license by the number of computers. Prices are in US dollars.
1 Computer
$49
- Clean files on 1 computer
- 1 year of free updates
- Unlimited 24x7 support
- Windows and Mac prices match
Up to 100 Computers
$199
- Clean files on 100 computers
- 1 year of free updates
- Unlimited 24x7 support
- Windows and Mac prices match
Up to 500 Computers
$399
- Clean files on 500 computers
- 1 year of free updates
- Unlimited 24x7 support
- Windows and Mac prices match
Need more PST tools? Get the PST Management Suite bundles PST Merge, Outlook Recovery, PST Password Remover, PST Converter, Split PST and Outlook Duplicates Remover for $99 instead of $264. Mac user? Buy the Mac edition license or download the Mac edition demo. Compare every bundle on the RecoveryTools offers page.
9Is it safe?
Can You Trust the Software With Your PST Files?
See Results First
Test the free demo on a copy of your file and check the result before you pay.
In Business Since 2007
RecoveryTools stands on a company that began in 2007 and now helps users in over 100 countries. Find more about RecoveryTools.
ISO Certified
Standards ISO 9001:2015 for quality and ISO/IEC 27001:2013 for information security back the company. See the awards and certifications page.
Terms in Plain Sight
Refund, privacy and usage terms are public before you pay. See the refund policy, privacy policy and terms of use.
10Need a hand?
Where to Get Help With Your Cleanup
Support engineers answer questions before and after you buy. Visit the RecoveryTools support center for phone numbers and more ways to get help.
Live Chat
Talk to an expert on live chat at any hour.
Email Support
Email support@systoolsgroup.com with your Windows or macOS version and the error message.
Remote Session
An expert connects to your computer and solves a hard case for you.
Step by Step Guide
Follow the user guide for the criteria and action screens.
11Still have a question?
Questions About Removing Duplicates From PST Files
Which Outlook items can the software clean?
Emails, contacts, calendars, journals, tasks and notes all qualify. Tick the item types you want on the Filter tab.
What is the difference between Within Folder and Across Folders?
Within Folder compares items inside one folder only. Across Folders compares items from every selected folder and finds copies that sit in different places.
Can I decide which fields count as a duplicate?
Yes. Click Specify Duplicate Criteria and tick the fields for every item type. Mail offers 14 fields including Subject, Mail Body, To, From, Cc, Bcc, Attachment and Sent Date. Save the settings and reuse them later.
What happens to the duplicates after the scan?
You choose the action. Permanently delete them, move them to Deleted Items, move them to a folder you select, flag them or mark them as expired. Every action works in two modes. Keep one copy of every item or treat all copies as duplicates.
Which files can I add?
PST, OST and BAK files. Password protected files and both ANSI and Unicode files are accepted. Add one file, a full folder or search a drive for files.
Do I need Outlook or admin rights?
No. Outlook is not needed and a standard user account is enough, with no admin rights.
Can I clean only a date range?
Yes. Add a start date and an end date under Apply Filters and the software checks items from that range only.
Can I split the PST file after cleaning?
Yes. Tick the split option and set a size between 10 MB and 200 GB for the output PST files.
Does it create a report?
Yes. Save the report of removed duplicates as a CSV or TXT file.
Is there a Mac edition?
Yes. Intel and Apple Silicon Macs both work with the Mac edition, which handles OLM and Mac PST files. Get the Mac edition demo or the Mac edition license.
What does the free demo include?
Demo mode removes duplicates from 15 items per folder on Windows and on Mac. License keys remove that limit.
How much does the software cost?
Personal costs $49 for 1 computer. Business costs $199 for up to 100 computers. Enterprise costs $399 for up to 500 computers.
Can I get a refund?
Yes. Refund requests are accepted for 30 days under the RecoveryTools refund policy. Software bought without a demo evaluation does not qualify. Email a signed Letter of Destruction to sales@recovery-tools.org. Bundle purchases cannot be refunded.
12Where next?
Related PST Tools and Guides
RecoveryTools Outlook PST Recovery
Repairs corrupt PST files and restores the mailbox items.
RecoveryTools PST Converter
Converts PST files to EML, MSG, PDF, MBOX and more.
RecoveryTools OST File Splitter
Cuts large OST files into smaller parts.
RecoveryTools EML to PST Converter
Saves EML files into a PST file.
RecoveryTools Upload to Office 365 Tool
Imports PST files into Microsoft 365 mailboxes in bulk.
RecoveryTools Free PST Viewer
Opens PST files without Outlook.
Outlook Guides From RecoveryTools
Clean Your PST File With the Free Demo
Download the free demo, test the criteria on a small sample and buy the license once the result looks right.