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.
Named rules change rows. Chatbots do not.
Drop CSV or Excel here
Tap to choose a file. Parsing stays on this device.
Parsing stays on this device. Optional: drop a .cleanmysheet.json recipe with it.
Steps
- Try the sample dataset
- Toggle a recipe step off
- Undo with Ctrl+Z
- 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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