SysTools
CSV Duplicates Remover for Windows & Mac

SysTools CSV Duplicates Remover is an offline desktop software for Windows and Mac that finds and removes duplicate rows within a single CSV file or across multiple CSV files. It runs entirely on a local computer so user data like customer lists, CRM exports and business data are never uploaded to any server.

  • Works 100% Offline No Upload, No Browser and No Sign-up Needed
  • Bulk Import Option to Add Single CSV Files or Entire Folders
  • Match on Entire Rows or Selected Columns (Email, Customer ID, Phone)
  • Use Dual Scan Mode to Find Duplicate Rows Within Single or Across CSV File
  • Remove Duplicates or Export Them to a Separate CSV For Review
  • Supports Common CSV Delimiters and UTF-8 Encoded Data
  • CSV Duplicates Remover Work on Windows 11/10 and macOS

Free Trial - Demo version of the CSV Duplicates Remover Software removes 10 records per file and comes with 30-days money-back guarantee.

SysTools CSV Duplicates Remover Software

(Average Rating 4.9 Based on 838 Reviews)

For Win

Screens

Video

Guide

For Mac

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Video

Guide

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Reliable CSV Duplicate Removal for Clean and Accurate Data

Known by leading technologists and professionals for accurately identifying and removing duplicate CSV entries while maintaining data integrity which making it a reliable choice for cleaning large data.

Remove Duplicates From CSV File On Windows and Mac Without Uploading Files

Online vs. SysTools CSV Duplicates Removal

Compare how your CSV files are handled

Feature Online CSV Tools SysTools Offline
Data leaves your computer Yes (or runs in browser memory) No
File size limit Usually a cap (MB / rows) No file size limit
Multiple files and folders Rarely Yes
Across file duplicate check No Yes
Works without internet No Yes
Source file safety Copy uploaded Safe/Read-only Mode
Suitable for confidential data Risky Yes

Offline CSV Duplicate Remover

Windows & Mac

Most free CSV duplicate removers are web tools and users need to upload their file, wait for it to process and download the result. That is fine for a test file but a CSV export generally holds customer names, email addresses, phone numbers or transaction data. Uploading this to a third-party site creates privacy, compliance and file-size problems.

SysTools CSV Duplicates Remover Software works differently as it is installed on your Windows or Mac computer and processes files locally.

Process CSV Files Locally

How SysTools CSV Duplicates Remover Works (Watch Video)

Explore our video tutorial to know secure Methods to Remove Duplicates from CSV Files easily without using Excel. You will explore and learn about detailed software features and how you can use these features for CSV duplicate file cleaning also which option is best to choose as per your data.

Find and Remove Duplicate Rows from CSV by Full Row or Selected Columns

When removing duplicate rows from CSV files then CSV Duplicate Finder identifies repeated records based on selected matching criteria. SysTools CSV Duplicates Remover can compare the entire row or selected columns to identify duplicate records.

Entire Row Matching

A record is treated as a duplicate when all values across the row match another record.

Selected Column Matching

Only the columns pick (for example Email or Email + Phone) decide whether a row is a duplicate and other columns can differ.

Multiple Column Matching

Users can select more than one column such as Email + Phone, when a combination of fields should be used to identify duplicate records.

Case and Spacing

[email protected] and [email protected] are treated as the same email using the CSV Duplicate Remover Software features.

CSV Duplicate Example

The CSV deduplication software identifies duplicate records based on the selected matching criteria.

Email Name City
[email protected] Anna Roy New York
[email protected] Anna R. New York
[email protected] John Smith Houston
[email protected] John S. Houston

Features of SysTools CSV Duplicates Remover Tool

Remove Duplicates from Large CSV Files Accurately

Dual Mode to Add CSV Files

Add CSV Files or Entire Folders

Users can simply add one file, many files or a whole folder as per their need and clean everything in one run. No need to open files one by one.

Smart Header Based Detection

Keep the Original Structure

Header row is detected automatically whereas the column order and structure of the CSV file are preserved in the output. This helps users to maintain consistent formatting when they are performing CSV duplicate removal on structured data.

Find Duplicates Within & Across Files

Find Duplicates Within or Across Multiple CSV Files

This CSV deduplication software provides two flexible modes to detect the duplicate records in a csv data file.

  • Within File: This option is best for those who just want to remove repeated rows inside each CSV.
  • Across Files: finds records that appear in more than one CSV as it is useful after merging exports from different systems.

Remove Duplicates by Rows or Columns

Remove Duplicates by Entire Row or Selected Columns

Users can simply choose Email, Customer ID, Phone, Company Name or any combination they need. Perfect for remove duplicate emails from CSV and customer-ID cleanup. One can also Compare two CSV Files or complete rows if needed.

Advance User Action Mode

Remove or Export Duplicates

The CSV Duplicates Remover Tool offers “Choose Action” mode where users can remove duplicate records from the output CSV file or export the removed duplicate records to a separate file for review and audit.

Maintain Data Integrity

Delimiters and Encoding

Supports comma, semicolon, tab, and pipe-delimited CSV files with UTF-8 data and special characters too. This makes the CSV duplicate cleaner tool much suitable for processing CSV files with different data formats.

Live Status With Detailed Report

Live Status With Detailed Report

SysTools CSV Duplicates Remover Tool is designed for complete user satisfaction and allows users to see live progress status and thereafter they can see complete detailed reports of the file. Users can get details of all the files and progress bar shows the details like the total number of duplicates count, how many failed or total number of success count.

Supports Windows and Mac Versions

Supports Windows and MacOS

The CSV Duplicates Remover supports Windows 11, Windows 10 (64-bit), Windows Server 2025, and macOS 11 (Big Sur) to macOS 15 (Sequoia) on Intel and Apple Silicon. Download CSV Duplicate Remover Tool and Install it on your system to safely remove duplicate data from CSV files.

Key Specifications of CSV Duplicates Remover

Check advanced key features of this CSV duplicate finder tool, designed for fast data cleaning.

SysTools CSV Duplicates Remover

(Windows OS)

Name: SysTools CSV Duplicates Remover
Version: 3.0
Size: 76.22 MB
MD5: e6e70b899acdbb34ea70f1b2eb5e8a49
Delivery: Free via Email
Free Version: Download for Windows

(Mac OS)

SysTools Mac CSV Duplicates Remover
3.0
25.72 MB
72cf0e0420aca0376d06b99e74403b96
Free via Email
Download for Mac

Trial Limitations:		 (Windows)

Free trial version of SysTools CSV Duplicates Remover Tool will remove 10 Records/File.		 (Mac)

Demo version of this Mac CSV Duplicates Remover tool is capable of removing 10 Records/File.
(Windows) (Mac)
Hard Disk Space: 100 MB of free hard disk space required 100 MB of free hard disk space required
RAM: 4GB of RAM (4 GB is recommended) 4GB of RAM (4 GB is recommended)
Processor: Intel® Core™ 2 Duo CPU E4600 @ 2.40GHz Mac Computer with Intel Processor
Mac Computer with Apple Silicon (Apple M1)

Platforms:		 (Windows)

Windows 11 (64 bit), Windows 10 (64 bit), Windows Server 2025		 (Mac)

MAC OS X 11.0 (Big Sur), MAC OS X 12.0 (Monterey), MAC OS X 13.0 (Ventura), MAC OS X 14 (Sonoma), MAC OS X 15.0 Sequoia and above editions.

Application Pre-Requisites:

(Windows)

  • Microsoft .NET 8 or above should be installed.

(Mac)

Product Guide:

(Windows)

(Mac)

User Control

CSV Duplicates Remover

FAQs

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For Different Data Cleanup

CSV Duplicate Remover for Different Data Cleanup Needs

Duplicate records can appear in many types of business and personal datasets. Using a dedicated CSV cleanup tool can help you when repeated records complicate the analysis, import or maintenance of a file.

Clean CRM Exports

Use SysTools CSV Duplicates Remover CRM data cleanup - CRM systems generally create repeated customer or contact records across the different exports. Now removing duplicates will help you create a cleaner list before importing data again.

Remove Duplicate Email Contacts

Marketing and contact lists can contain the same email address multiple times. So you can use the selected column matching option to remove duplicate emails from CSV data based on the Email column.

Clean Merged CSV Files

Combining data from multiple sources simply introduce repeated records. Across file duplicate detection can help you easily identify records that occur in more than one CSV file.

Prepare CSV Data for Analysis

Repeated records can affect counts, reports and also other data analysis tasks. So cleaning duplicate entries using secured CSV Duplicates Remover before analysis can help you produce a more consistent dataset.

Remove Duplicates in CSV - Excel vs SysTools CSV Duplicates Remover

Excel's "Remove Duplicates" function is effective only for small files as it has limitations. A worksheet can contain a maximum of 1,048,576 rows and it handles only one file at a time. Furthermore it cannot find duplicates across separate files and exporting the removed rows requires additional manual steps.

Capability SysTools Excel
Remove duplicate rows Yes Yes
Match selected columns Yes Yes
Row limit No Limit 1,048,576 per sheet
Process multiple CSV files at once Yes No
Process a whole folder Yes No
Find duplicates across files Yes Manual using formulas/Power Query
Export removed duplicates separately Yes Manual
Works without opening files in a spreadsheet Yes No

CSV Duplicate Removal Screens and Working

How To Use Software to Remove CSV Duplicates

The CSV duplicate removal software follows a simple Procedure to find and process duplicate records.

Step 1 Add CSV Files or Folder

Step 1: Add CSV Files or Folder

Add one or multiple CSV files or select a folder containing the CSV data you want to process.

Step 2 Choose Within File or Across Files

Step 2: Choose mode Within or Across Files

You can select Within File to find duplicates inside the same CSV or Across Files to identify duplicate records between multiple CSV files.

Step 3 Select Entire Row or Specific Columns

Step 3: Choose Match Method Entire Row or Specific Columns

Select whether duplicate detection should consider the entire row or only selected columns such as email, customer ID or phone number.

Step 4 Remove or Export Duplicates

Step 4: Choose action and output location

Now select the required action. You can remove duplicate records or export them separately for review.

Step 5 Start Duplicate Removal

Step 5: Click Remove Duplicates

Start the process and allow the software to scan the selected CSV data according to your chosen settings.

Full Comparison – Free vs Pro Version

Comparison of CSV Duplicate Data Remover Features - Free vs Paid Version

Features Free Edition Pro Edition
Bulk Add CSV Files
Add Entire Folder
Select smart removal filter (within & Across files)
Select Duplicate Action (Remove or Move to Separate File)
Maintain Data Structure
Records Removal Limit 10 Records/File Unlimited
Cost FREE $29

Frequently Asked Questions

Commonly Asked Queries on SysTools CSV Duplicates Remover Tool

Q1. Is my data uploaded anywhere when I use this tool?

No. SysTools CSV Duplicates Remover is a completely offline desktop application so your CSV files are processed on your own computer and your data will not be uploaded to any server.

Q2. Can I remove duplicate rows from a CSV file without Excel?

Yes. SysTools CSV Duplicates Remover Tool is particularly designed to identify and remove duplicate records from CSV files without requiring Excel.

Q3. Can I remove duplicate rows from multiple CSV files at once?

Yes. You can add multiple CSV files or simply process a folder and use the Across Files option to identify duplicate records between files.

Q4. How do I remove duplicate emails from a CSV file?

You need to add your CSV next choose Selected Columns, tick the Email column and start the process. Rows with the same email are treated as duplicates.

Q5. Can I remove duplicates based on one column?

Yes easily. You need to select a specific column or set of columns for duplicate matching rather than comparing every field in the row.

Q6. What is the difference between Within File and Across Files?

These are the two features of our software which you can use “Within File” simply identifies duplicates inside the same CSV file. “Across Files” identifies matching duplicate records between multiple CSV files.

Q7. Can I export duplicate records instead of deleting them?

Yes. You can export identified duplicate records separately when you want to review or retain them before completing your csv duplicate data cleanup.

Q8. Can I use the CSV Duplicate Remover on Mac?

Yes. A compatible macOS version is available you can download and install in your macOS system to remove duplicate CSV rows on a Mac.

Q9. Does the software change my original CSV file?

No. The source CSV file is read in read-only mode. The cleaned data is saved as a new file in the chosen location so that the original remains unchanged.

Words of Our Happy Customers

Genuine Feedback For Our CSV Duplicates Remover Software

4.9
838 Ratings
5 Star
87.7%
4 Star
10.6%
3 Star
1.6%
2 Star
0.0%
1 Star
0.1%
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