#081 · Validation & Quality Checks Tool

Validate Phone Number Column

Check a spreadsheet phone column for blank, malformed, or suspicious values and download a row-level CSV validation report.

Office File Tool

Local browser processing
row
rows
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How to use this office tool

  1. Select a compatible source file.
  2. Review the header or column setting and preview limit.
  3. Choose Validate phone numbers, inspect the bounded preview, and download the newly generated result.

What this tool does

Reads the selected sheet, detects a likely phone column from its header, normalizes spacing and punctuation for testing, then reports each value without changing your source file.

Reads the selected sheet, detects a likely phone column from its header, normalizes spacing and punctuation for testing, then reports each value without changing your source file.

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.

FormatUse
XLSX / XLSWorkbook data input where applicable
CSV / TSV / XMLPlain structured-data input where applicable
OutputA 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

How does the phone column validator choose a column?

It looks for a header containing phone, mobile, telephone, or contact and otherwise checks the first column.

Does the report prove that a phone number is active?

No. It checks characters and a plausible digit length; it does not call or query the number.

Are international phone numbers supported?

Yes, values may begin with a plus sign and contain 7 to 15 digits, but country-specific numbering plans are not verified.

Will phone extensions pass validation?

Extensions containing letters are flagged for review because the validator focuses on the main number.

Can I download only the invalid phone rows?

The CSV includes every checked row with a Valid or Issue status, so you can filter it after download.

Processing summary

StageBehavior
ReadLocal browser memory
TransformReads the selected sheet, detects a likely phone column from its header, normalizes spacing and punctuation for testing, then reports each value without changing your source file.
ExportNew downloadable file

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