csv-toolkit

Paste your CSV and pick a job: (1) full quality report — inferred column types, missing values, duplicates, casing and structural issues with concrete fixes; (2) clean — trim whitespace, fix duplicate headers, drop empty/duplicate rows, returns the cleaned file; (3) validate — check against your expected column list and completeness; (4) diff — compare two exports by ID key: added, removed, and field-level changes. Deterministic, exact, instant. No hallucinations — what's in the report is provably in your file.