CSV Duplicate Row Remover
Remove duplicate rows from a CSV in your browser, with optional case-insensitive and whitespace-trimmed matching.
Pure browser JavaScript. CSV parsing by PapaParse (MIT), self-hosted.
How to use this tool
- Paste CSV or upload a .csv file with a header row.
- Optionally enable Ignore case or Trim whitespace for looser matching.
- Click Remove duplicates, then Copy or Download.
Remove duplicate rows from a CSV in your browser, with optional case-insensitive and whitespace-trimmed matching.
Frequently asked questions
- What counts as a duplicate?
- A row is a duplicate when all of its column values match an earlier row (after optional trim/case folding). The first occurrence is kept.
- Is anything uploaded?
- No — deduplication runs locally in your browser via PapaParse.