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Free Tool

CSV Data Quality Checker

A CSV looks fine in a spreadsheet right up until it breaks your pipeline. Mixed types in one column, a comma inside an unquoted field, a column that's 30% empty — these are the issues that quietly corrupt an analysis or an AI project. Drop your file below and get a plain-English quality report in seconds.

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100% client-side. Your file is analyzed in your browser and never uploaded.

What it checks in your CSV

  • Inconsistent column types and malformed rows
  • Encoding errors, stray whitespace, and broken delimiters
  • Missing values and the fields where they hide
  • Duplicate and near-duplicate records
  • Outliers and suspicious distributions
  • Per-field statistics: cardinality, range, and variance

Want to fix what it finds? Read Data Hygiene: The Hard Truth About Your Data for the four most common data killers, or grab the free AI Data Readiness Checklist to audit a dataset end to end.