How to use this office tool
- Choose exactly two spreadsheet files in the intended A/B order.
- Run the positional comparison of their first worksheets.
- Review changed cells and download the complete CSV difference report.
#007 · Compare Audit & Reconcile Tool
Compare Two Excel Files
Compare the first worksheet in two spreadsheet files cell by cell and download a concise CSV difference report.
Office File Tool
Exactly two filesrow
rows
Ad space
What this tool does
The comparer aligns both first worksheets by row and column position, then records cells whose displayed values are different or missing.
File A cell position ↔ File B cell position → changed values → new CSV difference report
This is a positional comparison, not a key-based database join. Sort both sources consistently before comparing records that may appear in a different order.
Supported formats
Files are processed in memory on this device. Large or structurally complex workbooks may require desktop spreadsheet software.
| Input | Support |
|---|---|
| XLSX / XLS | Parsed locally with SheetJS CE |
| CSV / TSV | Supported with delimiter-aware parsing |
| Limits | 25 MB per file, bounded preview, up to 500,000 used cells |
Tips for better results
- Sort both tables the same way before positional comparison.
- Remove decorative top rows that shift the data grid.
- Use stable IDs for a later key-based reconciliation.
FAQ
How are the two spreadsheets aligned for comparison?
Cells are aligned by worksheet row and column position in the first sheet of each selected file.
Does the comparison match rows by an ID column?
No. It is positional. Use consistent sorting first or a key-based reconciliation tool for record matching.
Are formatting differences included in the report?
No. The report compares displayed cell values rather than fonts, fills, borders, widths, or other formatting.
How are rows present in only one file reported?
Cells outside the other file's used range appear with a blank value on the missing side.
What does the downloaded comparison contain?
The CSV lists sheet position, cell address, File A value, and File B value for every detected difference.
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Processing details
| Processing detail | Behavior |
|---|---|
| Browser processing | No file upload |
| Preview | 5–100 rows |
| Output | New generated file |
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