CSV Duplicate Row Remover
Remove duplicate rows from your CSV. Deduplicate by all columns or choose specific key columns. See exactly how many rows were removed.
📂 Drop a CSV file here or
Select the column(s) to use as deduplication keys (rows with matching values in these columns will be deduplicated):
Input CSV
Deduplicated Output
About CSV Duplicate Row Remover
The CSV Duplicate Row Remover finds and removes duplicate rows from your CSV data. You can deduplicate by exact full-row match, or choose specific key columns — useful for deduplicating by email address, ID, or any other unique identifier while keeping other column differences.
Deduplication Modes
- All columns — Two rows are duplicates only if every single cell matches exactly. Use this for a clean full-row dedup.
- Specific key columns — Two rows are duplicates if the selected key columns match. The first occurrence is kept; subsequent duplicates are removed.
FAQ
The first occurrence is always kept. All subsequent duplicate rows are removed.
When enabled, "Alice", "alice", and "ALICE" are treated as the same value during deduplication. The original casing of the kept row is preserved in the output.
No. All processing happens in your browser. Your data never leaves your device.