Remove Duplicates from CSV
Remove duplicate rows and empty lines from a CSV online, trim spaces and tidy headers. Free, in your browser, nothing is uploaded.
How to use the Remove Duplicates from CSV
Validate, beautify and clean JSON, CSV, XML and YAML.
- Paste or upload your data
- Choose the options
- Copy or download the result
Tips
- Invalid JSON shows the exact line and column. “Auto-fix” repairs comments, trailing commas and single quotes.
- Numbers and key order are kept exactly as written – nothing is rounded.
- CSV: any delimiter is detected automatically; pick the one you want for the output.
- YAML: comments are kept, and you can convert YAML → JSON or paste JSON to get YAML.
Example
Input: id,name
1,Ada
1,Ada
Output: id,name
1,Ada
Frequently asked questions
How do I remove duplicate rows from a CSV?
Upload the file, tick Remove duplicate rows and download the clean CSV.
Are rows compared on every column?
Yes. A row is a duplicate only when all its values match another row.
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