How to Remove Duplicates
- 1Upload your CSV file with duplicate rows
- 2Tool automatically scans and removes exact duplicates
- 3Download your cleaned CSV with only unique rows
Remove Duplicate Rows from CSV - Free Deduplication Tool
Remove duplicate rows from CSV files instantly. Free online deduplicator. Keeps unique rows only. No upload limits. 100% private client-side processing.
Back to Tools
Remove Duplicates
Upload a list and instantly delete duplicate rows.
Upload your files
Drag & drop or click to browse
Max 1 file(s).csv
Why Use This Tool?
- ✓Exact Duplicate Detection - Finds rows that match 100%
- ✓Preserves First Occurrence - Keeps the first instance of each unique row
- ✓Fast Processing - Handles thousands of rows per second
- ✓Memory Efficient - Uses streaming for large files
- ✓No Data Upload - Everything processed in your browser
Frequently Asked Questions
How does duplicate detection work?
The tool compares every row completely. If two rows have identical values in all columns, the duplicate is removed, keeping only the first occurrence.
Can it find similar (fuzzy) duplicates?
Currently, only exact duplicates are detected. For fuzzy matching (similar but not identical), this feature is planned for future updates.
What if I have headers?
Headers are automatically preserved and not considered for duplication. Only data rows are deduplicated.