DATA · CSV CLEANER
CSV cleaner
Clean messy CSVs: blanks, duplicate rows, and column order in one place.
Trim whitespace, remove blank rows, deduplicate, sort, select columns, and reorder them before exporting CSV or TSV.
Local only · file selection processes automaticallyLimits and safety
- No type inference is performed, so leading zeros stay intact.
- Spreadsheet-safe export is enabled by default for cells beginning with =, +, -, or @.
- Column selectors accept header names or 1-based column indexes. Ambiguous duplicate names must use indexes.
- Input limit: 1,000,000 characters or 2 MiB file; 20,000 rows and 200 columns.
Frequently asked questions
How do I use it?
Paste or choose a file, then pick cleanup actions.
Is anything uploaded?
Everything runs locally in your browser and is not uploaded.
How is this different?
CSV↔JSON converts formats; this cleans content.