Remove Duplicate Rows From CSV
Find exact duplicates by the entire row or one or more selected columns, preview groups, and keep the first or last occurrence.
Upload a CSV file to clean it
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How do I remove duplicate rows from CSV?
Repeated exports, appended reports, and copy-and-paste workflows often create identical rows. Those duplicates can inflate counts, create repeat emails, or make an import reject records that should be unique.
What this tool changes
- Matches on the entire row or the exact values in selected key columns.
- Keeps the first or last occurrence you choose and previews affected groups.
- Creates a new UTF-8 CSV download.
What it leaves alone
- The header row is excluded from duplicate comparison.
- Near matches, capitalization differences, extra spaces, and fuzzy matches are not treated as duplicates.
- No columns or values are edited.
How it works
Exact means exact. Every cell in a row must match. Similar names, different capitalization, or extra spaces remain separate.
Choose a key. Use one field such as Email or Customer ID, multiple fields such as Email + Country, or compare the entire row.
No fuzzy matching. The tool avoids guessing whether two customers or products represent the same thing.
Processed locally. The file stays on your device. Filenames, rows, cells, and worksheet names are never sent to us or analytics.