How to use this office tool
- Select a compatible source file.
- Review the header or column setting and preview limit.
- Choose Clean characters, inspect the bounded preview, and download the newly generated result.
#089 · Spreadsheet Cleanup Tool
Remove Nonprinting Characters from Excel
Remove ASCII control characters from spreadsheet text cells and download a cleaned workbook with a change count.
Office File Tool
Local browser processingrow
rows
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What this tool does
Walks every string cell in the workbook, removes control characters except tab and line breaks, and writes a new XLSX copy. Formulas are retained where supported.
Walks every string cell in the workbook, removes control characters except tab and line breaks, and writes a new XLSX copy. Formulas are retained where supported.
Keep the original file until you have checked the downloaded result in your spreadsheet application.
Supported formats
Accepts XLSX, XLS, CSV, and TSV. Output fidelity depends on features supported by SheetJS CE.
| Format | Use |
|---|---|
| XLSX / XLS | Workbook data input where applicable |
| CSV / TSV / XML | Plain structured-data input where applicable |
| Output | A newly generated XLSX or CSV file |
Tips for better results
- Keep a backup before processing.
- Use a clear header row and consistent column types.
- Review IDs, dates, formulas, and leading zeros in the preview.
- For sensitive files, close the tab after downloading the result.
FAQ
Which nonprinting characters are removed from Excel cells?
ASCII control codes are removed except tab, carriage return, and line feed.
Are spaces and line breaks removed?
No. Normal spaces, tabs, and line breaks are intentionally retained.
Does cleanup apply to formulas?
The cleanup targets string cell values and does not edit formula expressions.
How can I see how much was changed?
The result card reports scanned cells, changed cells, and removed character count.
Will every Excel feature survive the cleaned export?
No. Advanced objects and some formatting may not be fully preserved by a browser-generated workbook.
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Processing summary
| Stage | Behavior |
|---|---|
| Read | Local browser memory |
| Transform | Walks every string cell in the workbook, removes control characters except tab and line breaks, and writes a new XLSX copy. Formulas are retained where supported. |
| Export | New downloadable file |
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