Data & CSV Tools• Deduplication
CSV Duplicate Row Remover
Clean up email lists, customer databases, and product inventories by stripping duplicate rows while preserving original column ordering.
Processed 100% locally in browser memory.
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How to Use CSV Duplicate Row Remover
1
Upload CSV
Select your spreadsheet file.
2
Choose Match Strategy
Deduplicate by entire row or select specific key columns (e.g. 'Email' or 'User_ID').
3
Download Unique Rows
Inspect removed count and download the clean dataset.
About CSV Duplicate Row Remover
Constructs hash-set keys from specified column combinations, filtering subsequent duplicate occurrences in O(N) linear time.
Supported Formats
CSVTSV
Operational Limits
- •Case sensitivity can be toggled on or off
Key Features
- Deduplicate by all columns or specific key column
- Keeps first or last duplicate occurrence
- Displays exact number of duplicates removed
- Preserves header row intact
Frequently Asked Questions
Yes! Select 'Email' as the key column to ensure every email appears only once, even if other columns differ.
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