Qinsio — for finance & accounting teams
Remove duplicate rows. Find mismatches. In seconds.
Works entirely on your computer. No upload, no login, no account.
| Invoice | Vendor | Amount |
|---|---|---|
| INV-1042 | Acme Co. | $1,200.00 |
| INV-1042← duplicate | Acme Co. | $1,200.00 |
| INV-1043 | Beacon Ltd | $860.00 |
| INV-1044 | Corda Inc | $540.00 |
| Invoice | Vendor | Amount |
|---|---|---|
| INV-1042 | Acme Co. | $1,200.00 |
| INV-1043 | Beacon Ltd | $860.00 |
| INV-1044 | Corda Inc | $540.00 |
You know the drill.
It's the week before close. You've got the vendor list from AP and the payment run from the bank, and they don't match. So you open both in Excel, sort them, and start scrolling.
An hour in, you find a duplicate invoice that got paid twice. Another hour, and you're squinting at two rows that look identical except one has a trailing space in the vendor name.
There's no reason this should take a whole afternoon.
How it works
Drop your files
CSV or XLSX. Drop them into the browser — nothing is sent anywhere.
Every row is checked
Exact duplicate detection and row-by-row comparison between the two sheets. No sampling, no approximation.
Download a clean file and a report
A cleaned spreadsheet plus a plain list of every duplicate and mismatch found.
Your files never leave your computer.
Everything runs in your browser. There is no server upload, no cloud storage, no database, no account.
You could disconnect from the internet after the page loads and it would still work. When you close the tab, the file is gone — from us, because we never had it.
What it catches
The kinds of errors you'd only catch by scrolling through two files and comparing rows by hand.
Duplicate invoice, paid twice
Same invoice number, same vendor, same amount — entered on two different dates.
| INV-2231 | Northwind Supply | $3,420.00 | |
| INV-2231 | Northwind Supply | $3,420.00 | ← duplicate |
Near-match with a trailing space
"Northwind Supply " and "Northwind Supply" look identical. Excel treats them as different vendors.
| V-118 | Northwind Supply | $980.00 | |
| V-118 | Northwind Supply | $980.00 | ← mismatch |
Amount off by a rounding penny
Bank export says $1,204.99. Your ledger says $1,205.00. Flagged, not silently ignored.
| Bank | Corda Inc | $1,204.99 | |
| Ledger | Corda Inc | $1,205.00 | ← 0.01 diff |
Row in one sheet, missing in the other
Vendor payment appears in the bank export but not in the AP register — or vice versa.
| Bank | Vertex LLC | $720.00 | |
| Ledger | — | — | ← missing |
What it currently supports
Worth saying out loud so there are no surprises.
- File types
- CSV and XLSX
- Worksheets
- One sheet per file
- Row limit
- Up to 50,000 rows per file
- Browser
- Any modern desktop browser
If your file is bigger than that, or lives in Google Sheets, this probably isn't the right tool for you yet.
Clean a spreadsheet in the next minute.
No signup. Nothing to install. Your file stays on your machine.