CSV Cleaner & Deduplicator
Clean up a CSV file — trim spaces, remove empty rows and duplicate rows (or duplicates by one column), and fix ragged rows — all in your browser.
How to use
- 1Paste your CSV (the first row should be headers).
- 2Choose the clean-up options and copy or download the result.
Frequently asked questions
Can I remove duplicates by email only?
Yes — enter the column name (e.g. email) in 'Duplicate key column'. The first row for each value is kept.
Is matching case-sensitive?
Not when 'Ignore case' is on — so Alice@x.com and alice@x.com count as duplicates.
Is my data uploaded?
No — the cleaning runs entirely in your browser.