CSV Cleaner
Trim whitespace, remove duplicate or empty rows, and normalise line endings in CSV.
Quick answer: Trim whitespace, remove duplicate or empty rows, and normalise line endings in CSV.
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Frequently asked questions
- How do I clean a messy CSV?
- Paste the CSV, toggle the cleanups you want, and download or copy the cleaned result.
- What does Trim whitespace do?
- Removes leading and trailing spaces and tabs from every cell so values match correctly downstream.
- How does duplicate detection work?
- Two rows are duplicates if every cell matches after trimming. The first occurrence is kept.
- Why drop empty rows?
- CSV exports often include blank trailing rows that break downstream tools — this option removes them.
- What does Normalise line endings do?
- Replaces every \r\n or \r with \n so the file works on every platform.
- Is my CSV sent to a server?
- No. Cleaning runs entirely in your browser.
- Will it preserve quoted fields?
- Yes — we re-quote any cell containing the delimiter, quotes or newlines per RFC 4180.
- Can I clean huge files?
- Yes — the practical limit is your device's memory. Tens of MB clean in under a second.
- Does it sort the rows?
- No — order is preserved (other than removed duplicates). Sorting can damage data with implicit row ordering.
- Is this CSV cleaner free?
- Yes — free, no signup, no limits.