Excel and CSV data cleanup

I will turn messy spreadsheet or structured data into a clean, documented deliverable.

The starting package includes:

• up to 10,000 rows or 5 input files
• duplicate removal and consistent column formatting
• date, number and text normalization
• checks for missing or invalid values
• clean Excel/CSV export and a short results summary
• one revision after delivery

When useful, I can also provide a repeatable Python script for the agreed file structure. You receive the cleaned files, source code if included, and clear setup or usage notes.

Before starting, please send sample files with private data removed and describe the required output. Larger datasets, dashboards, scraping and custom integrations are quoted separately. I do not need passwords, wallet keys or account access.