Text utilities

Remove Duplicate CSV Rows

Remove repeated data rows from CSV while keeping the header and first occurrence.

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Data workspace
Data workspace

Check delimiters and structure before downloading the output.

See the method

Your source data

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Your transformed data

Your result

Let’s calculate.

Use the Calculate button to see your result.

Your content is processed locally.

How to use this tool

  1. Enter csv with a header row.
  2. Select Update result to view the result.
  3. Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

InputFormat and unitsSample
CSV with a header rowKeep the structure and separators shown in the sample. Line breaks are retained in this input.name,score Ava,20 Ben,30 Ava,20

Result for these sample inputs

name,score
Ava,20
Ben,30

Processed locally. Review the output before using it.

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

The method, explained

Compare complete parsed rows exactly, including capitalization and spaces. Keep the first occurrence.

A WORKED EXAMPLE

The repeated Ava,20 row is removed while Ben,30 remains.

What to keep in mind

Only whole-row duplicates are removed. Different whitespace counts as different content.

Common questions

How does this tool handle my input?

Processing happens in your browser. Your pasted content is not uploaded, included in URLs or stored as a calculation history.

What input should I use?

CSV with a header row: use the example already shown, then replace it with your own content. Only whole-row duplicates are removed. Different whitespace counts as different content.

Methodology maintained by ClarityKit. How these tools are built and checked.