CSV Duplicate Finder
Find duplicate rows in CSV data. Choose which columns to compare, view duplicates, and export unique rows.
CSV Input
Results
Compare by:
💡 Definition
Duplicate Detection
- Finding duplicates in CSV identifies rows with identical values across selected columns.
- This helps clean datasets, find data entry errors, and ensure uniqueness.
📖 How to use
Step by Step
- Paste CSV data — columns appear as buttons
- Select which columns to compare for duplicates
- See duplicate count and unique row output
- Copy the deduplicated CSV
🎯 Use cases
When to use
- Cleaning customer/email lists
- Validating data imports
- Finding duplicate transactions
- Quality assurance on datasets
Frequently Asked Questions
Can I check specific columns only?▾
Yes. Click column buttons to select which columns to compare. Only selected columns are used for duplicate detection.
What counts as a duplicate?▾
Two rows are duplicates if ALL selected column values match exactly (case-insensitive).