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CSV remove duplicates

Remove duplicate CSV rows while keeping the first occurrence.

Rows are compared across every column. Choose the separator used by your CSV. The first copy of each complete row is kept in its original order; selecting individual comparison columns is not supported. Include a header row. Quote cells that contain commas or new lines. Results update as you type. Up to 1,000,000 characters.

Your result

How to use CSV remove duplicates

  1. Enter csv in the input field.
  2. The result updates as you type. Adjust the available settings if needed.
  3. Review the result, then use Copy result or a download link when available.

Useful next steps

CSV viewer

Preview CSV rows and columns in a readable table.

CSV column selector

Keep selected CSV columns in the order you choose.

Remove duplicate lines

Remove repeated lines while keeping their first occurrence.

What to expect

Remove duplicate CSV rows while keeping the first occurrence. Rows are compared across every column. Choose the separator used by your CSV. The first copy of each complete row is kept in its original order; selecting individual comparison columns is not supported.