How to use this office tool
- Choose a spreadsheet and select the sheet and header row.
- Run the conservative type cleanup.
- Review changed cells and exceptions before using the new XLSX workbook.
#246 · Spreadsheet Cleanup Tool
Mixed Data Type Cleaner
Find columns that mix numbers, text, dates, and booleans, then normalize selected values conservatively into a new workbook.
Office File Tool
One spreadsheetrow
rows
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What this tool does
The cleaner infers the dominant type of each column and converts only clear matches. Ambiguous identifiers and unrecognized values remain unchanged and are listed in a report sheet.
Column profiling → dominant type → conservative conversion + exception report
Review the exception sheet before replacing a workflow. Leading-zero values and long identifiers are preserved as text.
Supported formats
Files are processed locally. XLSX and XLS workbooks are read with SheetJS; CSV and TSV files are parsed with delimiter-aware handling. Advanced Excel features may not be preserved in generated files.
| Format | Support |
|---|---|
| XLSX / XLS | Read workbook values and formulas |
| CSV / TSV | Read delimited rows |
| Output | New downloadable file or report |
Tips for better results
- Work from a backup when the source workbook is important.
- Keep identifiers such as ZIP codes and account codes stored as text.
- Review the bounded preview and downloaded result before replacing any business workflow.
FAQ
How is the dominant data type chosen?
The cleaner profiles nonblank values in each column and selects a type only when it has a clear majority.
Will ambiguous values be overwritten?
No. Values that cannot be converted confidently remain unchanged and appear in the Exceptions sheet.
How are leading-zero values handled?
They remain text to reduce the risk of damaging account numbers, postal codes, and asset identifiers.
Does the cleaner modify the uploaded workbook?
No. It creates a new workbook containing the cleaned sheet and an exception report.
Can it fully standardize dates?
It converts clear ISO-like date text to spreadsheet dates, but locale-ambiguous dates remain unchanged.
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Processing details
| Stage | Action |
|---|---|
| Input | One spreadsheet |
| Privacy | Local browser processing |
| Result | New downloadable output |
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