Turn a messy spreadsheet into a clean, documented, analysis-ready deliverable. I can: • Clean and standardize Excel, CSV, or TSV files • Merge compatible tables and preserve source traceability • Validate dates, numbers, required fields, and agreed formats • Flag conflicts, missing values, and uncertain duplicate matches • Deliver clean CSV files, an Excel workbook, and review reports Every delivery includes a change log, QA summary, exception report, and source-to-output reconciliation. I use automated tests and independent checks rather than relying on visual inspection alone. The starting price covers one small, clearly scoped dataset. Before accepting the work, I confirm the row count, required fields, cleaning rules, output format, and acceptance criteria from a representative sample.