How to Remove Duplicates from CSV File – Step-by-Step Guide

Introduction: CSV files are used for storing and managing structured data across various industries and platforms. As a dataset grows, the presence of duplicate records becomes common, and it occurs due to data import and system migration. Moreover, clean and accurate data is required to make sure a reliable analysis, reports, and decision-making process. Duplicate entries within a CSV file can compromise data integrity and lead to inaccurate outcomes. This guide walks through a manual method and professional MacSonik CSV Duplicate Remover Software to remove duplicates from CSV and deliver accurate results.

What is the CSV File Format?

The CSV (stands for comma-separated values file) is a plain text format that doesn’t save formulas, columns, rows, and cells. Therefore, it is suggested for contacts, phone numbers, and many more. Well, it resembles the spreadsheet (MS Excel) because it saves its data in tabular format. These data are saved in a file with a .csv extension. Furthermore, this Format works well on most of the spreadsheets, including MS Excel and Google Spreadsheets.

Why do users prefer to Remove Duplicate Rows in CSV File?

There are some common reasons discussed why user remove duplicate rows from their CSV file:

1. Accurate analysis starts with clean data, and duplicate rows are one of the first things worth addressing before diving into any dataset. 
2. For businesses working with large volumes of data, having a duplicate-free CSV file is simply part of keeping records structured and trustworthy. 
3. On a practical level, eliminating extra rows also brings the file size down, making it quicker to store, transfer, and work with. 
4. Data pulled in from several platforms at once tends to bring repeated entries along with it, and sorting those out early keeps everything far more organized. 
5. A clean CSV file also means faster processing across the board, and every system or tool reading that file will deliver results you can actually rely on.

Quick Solutions to Remove Duplicates from CSV

Now, we will walk through the best solution that accomplishes the elimination of duplicate files from CSV.

• Microsoft Excel (Manual Method)

• Enterprise-Grade Solution

Method 01: Manual Method to Remove Duplicate Rows from CSV

Microsoft Excel is one of the best solutions to remove duplicates, as it has a built-in duplicate removal option.

Step 01: Open the CSV File

1. First, open Microsoft Excel on your system.
2. After that, click on File from the top menu and then Open.
3. Now, browse and select your CSV file (data load to worksheet).
4. Next, click anywhere inside your dataset or press CTRL + A (for select all).
5. Then, go to the Data tab from the top menu and look for Data Tools.
6. Afterward, click on Remove Duplicates, and a dialog box will appear.

Step 02: Choose Column & Confirm

1. Check or uncheck the column based on where you want to find duplicates.
2. Meanwhile, click OK, and after that, Excel will process the data.
3. Finally, click on File >> Save As option.
4. At last, choose CSV format again and save your cleaned dataset.

Drawbacks of the Manual Method

• It will consume lots of time, especially when you want to remove a large file.
• No guarantee you might lose your data during the process. 
• There is a possibility that you might not get the expected output. In other words, you can lose a piece or all of your data.
• Nevertheless, it’s also an effective process and shows results. 

Method 02: Enterprise-Grade Software to Remove Duplicates from CSV 

MacSonik CSV Duplicate Remover is a top-notch & secure tool that helps you to eliminate the drawbacks of manual duplicate removal. With support for both individual and bulk file processing, the tool helps you to clean duplicates from one or multiple files at once. Moreover, it provides a smooth & efficient experience, even when you work with your large datasets. Likewise, it preserves data integrity & even supports duplicate removal from CSV as well as VCF (vCard) files. 

Steps to Remove Duplicate Contacts from CSV

1. To initiate the process, download the MacSonik CSV Duplicate Remover Software.
   

 

2. After that, click on the option remove duplicates from the CSV files.
   

 

3. Now, click on Add File/Folder and add the duplicate files, and then click Open.
   

 

4. Next, preview the loaded files in a tree structure and click on Next.
   

 

5. Thereafter, click on Output Path to save the resultant files and then click Next.
   

 

6. In the end, a pop-up window will appear that says Process has been completed successfully.
   

Read More: If you want to remove duplicates from Google Drive, then read our detailed guide on Find and Remove Duplicates in Google Drive

Conclusion

To summarize, we have discussed all the aspects of why users Remove Duplicates from CSV. While the manual method is free, it has limitations. Thereafter, we recommended using professional software to easily remove your duplicate data and keep your Excel files clean and structured.

Frequently Asked Questions

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