- Removes later rows only when every cell exactly matches an earlier data row.
- Keeps the first occurrence and preserves the order of all remaining rows.
- Creates a new UTF-8 CSV download.
CLEAN TOOL · 03
Remove Duplicate Rows From CSV
Keep the first exact copy of every row.
Count and remove completely identical data rows while preserving the header, row order, and first occurrence.
✓ Free✓ No signup✓ Runs in your browser
Upload a CSV file to clean it
Your data never leaves your browser
Drop a CSV file here
Choose a fileCSV, TSV or text · up to 50 MB
THE PROBLEM
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.
- The header row is excluded from duplicate comparison.
- Near matches, capitalization differences, extra spaces, and different IDs are not treated as duplicates.
- No columns or values are edited.
HOW IT WORKS
Clear changes, no hidden guesses
Exact means exact
Every cell in a row must match. Similar names, different capitalization, or extra spaces remain separate.
Header and order stay put
The heading row is retained and the first copy remains in its original position.
No fuzzy matching
The tool avoids guessing whether two customers or products represent the same thing.