Is my CSV uploaded?
No. The selected file is read and processed in your browser.
CSV Data Cleaner
v2 secureDeveloper Utility
CSV Data Cleaner Online - Clean and Download CSV Files
Clean CSV data locally in your browser by removing blank rows and duplicates, trimming whitespace, and filling missing values.
Paste comma-separated data or upload a local CSV. Files are read in your browser and are not uploaded.
Cleaning options
- • Removes fully empty rows and duplicate records.
- • Trims leading/trailing whitespace and fills empty cells.
- • Preserves quoted commas, quotes, and line breaks.
Your cleaned CSV preview and change summary will appear here.
Paste CSV content or choose a local CSV file to remove empty rows and duplicate records, trim surrounding whitespace, and fill blank cells.
Cleaning is performed locally in your browser. Preview the cleaned rows and download a fresh CSV when the result looks right.
How to Use This Tool
- Paste CSV data or select a CSV file.
- Choose whether the first row contains column headers and set a missing-value replacement.
- Select Clean CSV to inspect the cleaned preview and change counts.
- Download the result as a CSV file.
CSV cleanup in your browser
Quoted fields, including commas, quote escapes, and line breaks, are preserved during parsing. Empty rows and repeated data records are removed after whitespace is trimmed.
The preview shows up to 100 rows for quick review. The download always contains the complete cleaned dataset.
Frequently Asked Questions
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