#135 · Privacy Export & Printing Tool

Find ID Number Patterns in Excel

Flag cells that resemble common ID-number formats and export a candidate report for human review; nothing is removed automatically.

Office File Tool

Local browser processing
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How to use this office tool

  1. Choose the source spreadsheet or text table.
  2. Select the worksheet and adjust the visible options.
  3. Click Find ID patterns, review the bounded preview, then download the new result.

What this tool does

Flag cells that resemble common ID-number formats and export a candidate report for human review; nothing is removed automatically.

Find ID patterns → validate the result → create a separate downloadable file.

The original file is never overwritten. Review the downloaded result before using it in production.

Supported formats

This tool accepts common spreadsheet and delimited-text formats within practical browser limits.

FormatSupport
XLSX / XLSRead with SheetJS; complex Excel-only features may not be preserved.
CSV / TSVParsed locally with delimiter and quoting awareness.

Tips for better results

  • Keep a backup of the original workbook.
  • Preview the result before downloading.
  • Check identifiers and dates after conversion.

FAQ

Does Find ID Number Patterns in Excel upload my workbook?

No. Processing happens in your browser. The page does not send workbook contents to a server.

Will Find ID Number Patterns in Excel overwrite the original file?

No. It creates a separate download, so your selected source file remains unchanged.

Does a match prove that a cell contains a real ID?

No. Pattern matching produces candidates and can include false positives. A person should verify every flagged cell.

Are formulas recalculated like desktop Excel?

No. Formula text can be preserved or inspected, but this browser tool is not Microsoft Excel's calculation engine.

What size workbook should I use?

For dependable browser performance, use files under 40 MB and worksheets below 750,000 cells. Split larger files first.

Processing summary

StepBehavior
InputFind ID Number Patterns in Excel
OutputNew CSV report

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