Excel data cleanup, input and CSV

Separate rules for future input from cleanup of existing data. Changing how a cell appears differs from deleting values or rows, so plan how to reverse the operation.

Before choosing a task

  1. Save a working copy and check headers, blank rows and merged cells.
  2. Use dropdowns to constrain input, or freeze panes to keep headings visible.
  3. When importing CSV, check leading zeros and automatic date conversion as well as character encoding.

Browser-local checking tools

  • CSV inspector and UTF-8 export →

    Check CSV rows and columns, rows with a mismatched column count, leading zeros and formula candidates in your browser, then save the values as UTF-8 CSV.

Follow the steps

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