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CSV Column Cleaner

Paste CSV, choose a header and clean that column without uploading the table anywhere.

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Trim, normalize and case-clean one CSV column.

When to use this tool

Use it when CSV, JSON or small table data needs a quick cleanup before import, review or handoff.

  1. Clean pasted spreadsheet data before importing it.
  2. Remove duplicate rows or normalize columns.
  3. Prepare a small data sample without uploading the file.
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FAQ

Questions

Questions

Does the CSV cleaner upload my spreadsheet?

No. The CSV is parsed and cleaned in your browser.

How do I select a column?

Enter the exact header name from the first CSV row. Matching ignores extra spaces and letter case.

Are quoted commas preserved?

Yes. The cleaner supports quoted CSV cells, escaped quotes and commas inside quoted values.