#188 · Sort Filter & Search Tool

Find Duplicate Cell Values

Scan a worksheet for repeated cell values and download a report showing each duplicate and its locations.

Office File Tool

Local browser processing
row
rows
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How to use this office tool

  1. Upload a spreadsheet and select the sheet.
  2. Set the header row if headings should be excluded.
  3. Choose whether to trim whitespace before comparison.
  4. Run the scan and download the duplicate-location report.

What this tool does

Normalizes nonblank displayed values, counts exact matches, and exports only values appearing more than once.

Normalizes nonblank displayed values, counts exact matches, and exports only values appearing more than once.

Matching is case-sensitive unless Trim cell whitespace is enabled; blank cells are ignored.

Supported formats

Reads XLSX, XLS, CSV, and TSV in the browser. The exact output format is shown in the tool controls.

FormatSupport
XLSX / XLSCell data; advanced objects may not be preserved
CSV / TSVUTF-8 delimited data; one table per file

Tips for better results

  • Decide whether capitalization should distinguish values before scanning.
  • Exclude headers so repeated labels do not pollute the report.
  • Review duplicates in context before deleting any source data.

FAQ

Does the duplicate finder compare entire rows?

No. It finds repeated individual cell values and lists their worksheet addresses.

Are blank cells reported as duplicates?

No. Empty cells are ignored.

Is duplicate matching case-sensitive?

Yes. Uppercase and lowercase values remain distinct in this version.

Can it find duplicate numbers and dates?

Yes. It compares displayed values, though different underlying formats can produce different text.

Does the report remove duplicates from Excel?

No. It creates an audit report and leaves the source workbook unchanged.

Processing notes

AreaBehavior
PrivacyLocal browser processing
SourceNever overwritten
PreviewLimited to selected rows

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