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ConvertBox

Data Cleaner

Clean and transform your data: remove duplicates, trim whitespace, handle empty values, and more.

🧹

Upload Data File

Upload a CSV or Excel file to clean

Max file size: 50MB

or drag and drop · press Enter to browse

How to Use

  1. Upload a CSV or Excel file
  2. Select cleaning options (remove duplicates, trim, etc.)
  3. Choose columns to delete if needed
  4. Preview the cleaned data
  5. Download the cleaned file as CSV or Excel

All processing is done in your browser, and files are never sent to a server.

Frequently Asked Questions

No, all cleaning is done locally in your browser. Your data never leaves your device.
CSV, TSV, XLS, and XLSX files are supported.
Changes are applied as a preview. Your original file is never modified. Simply adjust the options to change the result.
Rows that are completely identical across all columns are removed, keeping the first occurrence.
Files up to 50MB are supported. Performance depends on your device.
Yes, use the "Delete Columns" section to select which columns to remove from the output.
No. All tools on ConvertBox are 100% free. We do not insert watermarks, limit features, or require any registration or payment.
Yes. Once the page and its local library dependencies are loaded in your browser, the conversion logic runs completely offline without needing an active internet connection.

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