CSV Dedupe
Remove duplicate rows from CSV files
Drop your file here or click to upload
Supports CSV, TSV, TXT files up to 100MB
How to Use
- Upload your CSV
- Select columns to check for duplicates
- Choose which occurrence to keep
- Download deduplicated CSV
Features
- Select columns to check
- Keep first/last occurrence
- Preview duplicates
- Show duplicate count
Use Cases
- Clean up contact lists
- Remove repeated entries
- Ensure data uniqueness
Frequently Asked Questions
Is CSV Dedupe free to use?
Yes, completely free with no limits. No signup or download required.
Is my data private when using CSV Dedupe?
Absolutely. All processing happens in your browser. Your data never leaves your device.
How are duplicates detected?
Rows are compared across all columns or selected columns. The first occurrence is kept and subsequent duplicates are removed.