#227 · Compare Audit & Reconcile Tool

Three Way Spreadsheet Comparison

Compare three spreadsheet versions cell by cell and separate unanimous values, two-against-one differences, and three-way conflicts.

Office File Tool

Choose exactly three files
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How to use this office tool

  1. Select the required spreadsheet files.
  2. Choose the worksheet and adjust the available options.
  3. Select Compare three files and inspect the bounded preview.
  4. Download the newly generated result file.

What this tool does

Compare three spreadsheet versions cell by cell and separate unanimous values, two-against-one differences, and three-way conflicts.

For each used cell, values from files A, B, and C are compared as displayed text. The CSV report classifies agreement, one-version differences, and conflicts.

Files remain on this device. Keep a backup of the source file and review generated reports before acting on them.

Supported formats

Requires exactly three XLSX, XLS, CSV, or TSV files. The first worksheet in each file is compared; formulas are reported as stored values unless preservation is selected.

FormatSupport
XLSX / XLSBrowser parsing with SheetJS CE
CSV / TSVDelimited table input
OutputNew XLSX, CSV, JSON, or YAML report

Tips for better results

  • Use a clear header row and unique column names.
  • Keep identifiers such as postal codes stored as text.
  • Check dates, large integers, and formula results in the preview.
  • For sensitive workbooks, close the tab after downloading the result.

FAQ

Does the three way comparison upload my file?

No. The selected file is read and processed locally by JavaScript in your browser. This page does not send its contents to a processing server.

What happens to formulas and formatting in this three way comparison?

Requires exactly three XLSX, XLS, CSV, or TSV files. The first worksheet in each file is compared; formulas are reported as stored values unless preservation is selected.

How large a file can I process with the three way comparison?

The page enforces a 50 MB per-file and 1,000,000-cell safety limit. Practical capacity also depends on your device memory and browser.

Can I review the three way comparison result before downloading?

Yes. A bounded preview and summary statistics appear after processing. The full newly generated result is available from the Download button.

Why might the three way comparison result differ from Excel?

Browser libraries read stored workbook data but do not reproduce the complete Microsoft Excel calculation and rendering engine, VBA, Power Query, or every advanced workbook object.

Processing notes

AreaBehavior
PrivacyLocal browser processing
PreviewLimited rows and columns
SafetyCSV formula-prefix protection option

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