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CSV Duplicate Remover

Paste CSV data, choose how duplicate rows are matched and keep the first or last copy locally in your browser.

✓ Tool inputs are processed in your browser✓ No account
Deduplicate CSV rows locally.

When to use this CSV duplicate remover

Use it when a CSV export has repeated rows and you want to clean it before import, sharing or review.

  1. Remove repeated contacts before uploading a list.
  2. Deduplicate exports by email, ID or another key column.
  3. Keep the first or latest matching row while cleaning a spreadsheet.
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Remove repeated lines while keeping order.

FAQ

Questions

Questions

Does the CSV duplicate remover upload my file?

No. Parsing and deduplication run in your browser.

Can it match duplicates by one column?

Yes. Choose selected columns and enter header names such as email or ID.

Does it support quoted CSV values?

Yes. The parser supports quoted delimiters and escaped quotes for common CSV files.