CSV Duplicate Remover

Keep the first occurrence, choose one or more key columns, and export a deduplicated table locally.

CSV

Key columns

Mode

—The first occurrence is kept.

How to use this CSV Duplicate Remover

Remove duplicate CSV rows by all columns or selected keys. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.