{"id":3236,"date":"2026-05-06T12:51:01","date_gmt":"2026-05-06T12:51:01","guid":{"rendered":"https:\/\/www.macsonik.com\/blog\/?p=3236"},"modified":"2026-05-12T10:31:33","modified_gmt":"2026-05-12T10:31:33","slug":"remove-duplicates-from-csv-file","status":"publish","type":"post","link":"https:\/\/www.macsonik.com\/blog\/remove-duplicates-from-csv-file\/","title":{"rendered":"How to Remove Duplicates from CSV File \u2013 Step-by-Step Guide"},"content":{"rendered":"\n\n
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User-Query:<\/strong><\/p>\n

“How can I quickly remove duplicate records from a very large CSV file (around 200,000 rows) that contains customer name, number, and city columns?”<\/span><\/em><\/p>\n

— Posted by<\/span><\/em> “Peter”<\/em><\/strong><\/p>\n<\/div>\n

Introduction: <\/strong>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<\/strong><\/a> Software to remove duplicates from CSV and deliver accurate results.<\/p>\n

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