Remove Duplicate Rows from CSV

Paste CSV data and deduplicate by entire row or a specific column. Copy the deduplicated output.

How to use

  1. Paste your CSV data in the input box.
  2. Choose to dedupe by all columns or a specific column.
  3. Copy the deduplicated output.

Frequently asked questions

How does deduplication work?

Keeps the first occurrence of each unique row or column value and removes subsequent duplicates.

Can I dedupe by a single column?

Yes. Select a column index to deduplicate based on that column only.

Is the header row preserved?

Yes. The first row is treated as a header and is never removed.

Is my CSV sent to a server?

No. Deduplication happens entirely in your browser.

Last updated

Powered by maratool