Compare two Excel files and see what changed
Monthly replay · coming soon
Set it up once. Run it again every month.
Same workbook every month? Save the comparison: key column, compared columns, header row, date order. Next month, drop the two new files and get the answer with the same rules.
- Key
- SKU
- Compared
- Description, Unit Price, Effective Date
- Dates
- Month/Day (US)
- Header row
- 1
Same result · verifiable privacy
One pair of workbooks, one result
Formatted cells, currency signs and thousands separators are read as the values they hold: a cell shown as 1,200.00 with its currency sign matches 1200 in the other file.
- Your files never leave your browser
- Same files, same result, every time
- Replay the same comparison next month (coming soon)
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The same result, every time
The same two files always give the same comparison, with the same rules. No AI touches your data.
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Privacy you can verify
All the work happens in your browser. Open the network panel while you compare: no file is sent anywhere.
Verify what leaves your browser
What you get
Every change between the two workbooks, row by row
Rows are matched on a key column such as a SKU or an ID, not on their position: a sorted or filtered sheet changes nothing.
| Change | SKU | Description | Unit price | Effective date |
|---|---|---|---|---|
| Unchanged | TX-0205 | Cable tray 2 m | 1,200.00 = 1200 in file B, not a change | 2026-10-01 |
| Added | TX-1042 | Steel bracket 40 mm | 12.50 | 2026-11-01 |
| Removed | Wall anchor, pack of 50 | 8.90 | 2026-09-01 | |
| Modified | TX-0311 | Hex bolt M8 | 2026-10-01 |
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No false differences
Currency signs, thousands separators, formatted XLSX against raw CSV: not counted as changes.
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Duplicate keys are flagged
A key that appears twice is reported and its rows set aside, not silently matched to the wrong row.
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Ambiguous dates? It asks.
When a date could be US or UK order, Tabulys shows the doubt and lets you decide. Nothing is settled behind your back.