CSV Duplicate & Blank Row Cleaner
Local ProcessingFind or remove duplicate CSV rows, check duplicates in one column, and drop blank rows.
How It Works & Processing Standards
Find or remove duplicate CSV rows, check duplicates in one column, and drop blank rows.
Tool processing runs in your browser. If you create a calculator or conversion share link, its values are included in the URL. See the privacy policy for account, analytics and advertising data.
Current Limits
- Desktop max file size: 50MB
- Mobile max file size: 20MB
Choose remove duplicates, find duplicates, check a column or remove blank rows under "Task". Useful after merging sign-up lists or order exports.
What You Can Do
- Remove or find duplicates
- Keep the first of identical rows, or list them.
- Column duplicate check
- Counts repeated values in columns like email or ID.
- Remove blank rows
- Deletes rows where every cell is empty.
How to Use CSV Duplicate & Blank Row Cleaner
- 1Choose a taskPick the clean-up.
- 2Enter CSVPaste CSV and name a column if needed.
- 3Get the resultSee the cleaned CSV or the check.
Examples
Remove duplicate rows
Input: a,b
1,2
1,2
3,4
Result: a,b
1,2
3,4
Email duplicate check
Input: 이메일,이름
a@x.com,민수
b@x.com,지영
a@x.com,철수
Result: 1 duplicate value, 2 duplicate rows — a@x.com (2)
Common Use Cases
- Removing people listed twice after merging lists
- Checking that IDs or emails are unique
Frequently Asked Questions (FAQ)
Are rows differing only by case or spaces duplicates?
No. Every cell must match exactly. Normalise spaces and case first with the CSV cell clean-up tool.