ryzhartlab.

FEWER DUPLICATES. MORE CLARITY.

Clean CSV.

Give every row its place. Remove repeated rows
and keep your data just the way you need it.

All tools

Clean a CSV file

  1. 1Upload file
  2. 2Clean
  3. 3Download

A SPACE OF YOUR OWN

Good work starts here.

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Your file is used for this cleanup. We do not keep a permanent copy.

IN CASE YOU WERE WONDERING

A little more
clarity.

What counts as a duplicate row?

Two rows are duplicates when every field contains exactly the same value. “Ava”, “ava”, and “ Ava” are different. We keep the first occurrence and the original order. Headers are not compared with data rows.

How do I prepare a CSV in Excel?

Save or export your worksheet as “CSV UTF-8 (Comma delimited)”. Include column names in the first row and keep the file within 5 MiB. If your regional settings use semicolons, export with commas before uploading.

What happens to my file afterward?

Your file is sent to the server when you click “Remove duplicates”. The upload is closed after reading, and we do not keep a permanent CSV copy. We retain only operation metadata, such as size, counts, and status. The result stays available in your browser for download. Read our privacy information.

Do accents, numbers, or columns change?

Values stay as text, and columns stay in their original order. Downloads use UTF-8 with a BOM to make opening them in Excel easier. CSV quoting and line endings are normalized, and blank lines are skipped.