Data Tools
Remove Duplicate Rows
Find and remove duplicate rows from any CSV file in seconds — free, browser-based, no signup.
No uploadsInstant dedup
CSV Input
How to remove duplicate rows from a CSV
- Paste your CSV into the input area or upload a .csv file.
- Choose whether comparison should be case-sensitive.
- Click Remove Duplicates to process.
- Review the stats, then download the cleaned file.
Privacy — your data stays local
Deduplication runs entirely in your browser. Your data is never sent to any server.
Frequently Asked Questions
Is the header row protected from removal?
Yes. The first row is always kept and is never treated as a duplicate, regardless of its content.
What does case-sensitive mean here?
With case-sensitive on, "Alice" and "alice" are considered different values. With it off, they are treated as duplicates.
Does it deduplicate across all columns or just one?
Across all columns — a row is considered a duplicate only if every cell in it matches another row exactly.
Can I deduplicate by a single column only?
Not in this version. For column-level deduplication, try the CSV Cleaner or export to a spreadsheet tool.