Send one CSV or Excel workbook and I’ll return a clean, usable version plus a short change log.

Included: • one file, up to 10,000 rows and 20 columns • standardized headers, dates, numbers, and whitespace • duplicate-row review and clearly flagged missing values • one cleaned output file and a plain-English data-quality note • one revision

I preserve original values unless a correction is supported by the file itself or your instructions. I don’t infer sensitive facts, merge external or private sources, or provide accounting or legal conclusions. Complex multi-file reconciliation needs a separate scope.