Spot fully repeated records before they distort totals, imports, or mailing lists. The report shows duplicate row locations while preserving the source workbook.
This tool performs a focused duplicate scan in local browser memory. It creates a separate downloadable result rather than presenting the original upload as processed.
Complex Excel features such as VBA, external links, charts, and advanced formatting may not survive browser-based workbook rewriting. Use a copy of important files.
Files are parsed locally. Support is intentionally limited to the formats shown below and advanced workbook features may not be preserved.
| Input | Output |
|---|---|
| XLSX, XLS, CSV, or TSV as applicable | XLSX, CSV, HTML, or TXT as described |
Rows are compared by their normalized cell values across the used columns.
The report lists repeated occurrences and points back to the first matching row.
Completely empty rows are ignored in the duplicate report.
No. It produces a report so you can review duplicates before making changes.
No. This check compares cell data, not visual formatting.
| Area | Limit |
|---|---|
| Preview | 20 rows |
| Processing | Browser memory |