Marketplace CSV Data Cleaner Skill

Skill Automation Workflows

CSV Data Cleaner Skill

Fixes messy CSV exports, duplicate rows, and malformed values, then reports exactly what changed.

4.8 (96 reviews) 3,110 downloads v1.4.0 Updated Jul 2, 2026

About this skill

Drop in a messy CSV export and get back a clean one: duplicate rows removed, inconsistent date and currency formats normalized, and blank or malformed cells flagged instead of silently dropped. A change log comes back alongside the file so nothing happens to your data without a paper trail.

Key features

  • Detects and merges duplicate rows by fuzzy match, not just exact match
  • Normalizes dates, currency, and phone formats to one standard
  • Flags cells it is unsure about instead of guessing silently
  • Outputs a plain-English change log next to the cleaned file

What's included

  • SKILL.md definition
  • Example before/after CSV
  • Column-mapping reference

Requirements

  • Claude AI with Skills enabled

Built for

Claude AI