Remove Duplicates from CSV
Identify and remove duplicate rows from your CSV files. Choose which columns to check and which duplicates to keep.
Drag & drop your CSV file here
or
How to Remove Duplicates
Step-by-Step Guide
- Upload your CSV file or use sample data
- Select which columns to check for duplicates
- Choose whether to keep first or last occurrence
- Review the duplicates found
- Download the cleaned CSV file
Pro Tips
- • Select all columns for exact duplicate detection
- • Use specific columns to find partial duplicates
- • Case-sensitive option affects text comparison
- • Preview both cleaned data and removed duplicates
- • All processing happens in your browser
Frequently Asked Questions
What defines a duplicate row?
Rows are considered duplicates if all selected columns have matching values.
Is my data secure?
Yes! All processing happens in your browser. Your files never leave your computer.
Can I undo the removal?
You can always re-upload your original file or download the duplicates separately for review.