How to quickly remove duplicate rows in CSV, Excel and Markdown tables?

If you use CSV, Excel, or Markdown spreadsheets, you may encounter duplicate rows. This can happen if you manually entered the same data or imported duplicates from other sources. Whatever the reason, removing duplicate rows is an important part of data cleansing. In this article, we will share several ways to quickly remove duplicate rows from CSV, Excel, and Markdown spreadsheets.

1. Online Spreadsheet Tool (Recommended)

You can use an online tool called “TableConvert” to remove duplicate rows. With this tool, you can easily check and remove duplicate rows in your CSV, Excel and Markdown tables. Just open your browser and follow the link https://tableconvert.com/excel-to-excelpaste or upload your data and click the “Deduplicate” button in the spreadsheet editor. It's quick and easy. Look at the image below:

2. Removing duplicate rows in Excel

Removing duplicate rows in Excel is very simple. First, open the Excel file and select the column in which you want to check for duplicate rows. Then click on the Data menu and select Remove Duplicates. Excel will display a dialog box in which you need to select the columns to remove duplicates. Click OK and Excel will remove all duplicate rows.

3. Remove Duplicate Rows in CSV Using Python

If your data is saved in a CSV file, you can use Python to remove duplicate rows. First, install the library pandasThen use the following code to read the CSV file, remove duplicate rows, and save the clean data back to the file:

import pandas as pd

data = pd.read_csv("your_file.csv")
data = data.drop_duplicates()
data.to_csv("your_file.csv", index=False)

This code reads a CSV file, removes duplicate rows, and writes the clean data back to the original file.