Data Tools
CSV Cleaner
Remove empty rows, trim whitespace, and fix common CSV issues — free, browser-based, no signup.
No uploadsInstant clean
Cleaning Options
CSV Input
How to clean a CSV file
- Paste your CSV data into the input box or upload a .csv file.
- Select which cleaning operations to apply from the options above.
- Click Clean CSV to process your data.
- Review the stats summary, then download your cleaned file.
Privacy — your data stays local
All cleaning is done in your browser using JavaScript. Your CSV data is never sent to a server.
Frequently Asked Questions
What does "trim whitespace" do?
It removes leading and trailing spaces from every cell. For example, " Alice " becomes "Alice".
Does removing duplicates keep the header row?
Yes. The first row is always kept and is not considered for duplicate detection.
Can it handle CSV files with special characters?
Yes, including quoted fields with commas, newlines, and escaped double-quotes.
Is there a file size limit?
No hard limit beyond your browser's memory. Files up to 100 MB work well in most browsers.