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CSV DEDUPLICATE · DISTINCT

Remove Duplicate Rows from a CSV

Detect duplicates using all columns or selected columns and keep the first matching row. Your CSV never leaves your browser.

Open this toolSpecifications & limits

CSV processing stays in your browserYour files are not uploaded to a server.

Remove duplicate CSV rows

Compare all or selected columns, keep the first row, and exclude later matches.

How it works

  1. Choose a CSV and review the key columns.
  2. Compare all columns or selected columns.
  3. Run, then review excluded rows and the preview.

Before you start

  • Case can be ignored, but surrounding spaces and full-width forms remain distinct.
  • The first row is kept. Sort first to keep the newest or highest-priority row.
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