CCleanMySheet

CleanMySheet guide

Why a rule-based cleaner beats ChatGPT for CSV cleanup

ChatGPT can rewrite tables but may invent cells and requires an upload. CleanMySheet applies named, reversible operations with a per-cell reason and a downloadable quality report. Use an LLM only as an optional type hint on samples, never as the row engine.

Open the cleaner

Steps

  1. Try the sample dataset
  2. Toggle a recipe step off
  3. Undo with Ctrl+Z
  4. Compare with a chatbot paste

When a model still helps

Ambiguous column types on messy headers. Turn Strict off to send ~15 sample values per unsure column to Haiku. Full rows still stay local.

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