Compare Two Spreadsheets
Compare two Excel or CSV files and see exactly what changed: which rows were added, which were removed, and which cells differ between them. Match rows by position, or by a key column so reordered and inserted rows still line up.
A spreadsheet compare tool shows exactly what changed between two files: rows added, rows removed, and the individual cells that differ. Drop in the original and the new version, match rows by position or by a key column like an ID, and review the diff, so it works to compare two Excel files or diff two CSVs. Reordered rows still line up when you match on a key, so a row that only moved is not flagged as both added and removed. Both files are read on your own device.
Read the guide: How to Compare Two Excel FilesOriginal (left)
Compared (right)
Everything runs on your device. Files never leave your browser.
How it works
- 1
Add both files
Drop in the original file and the one you want to compare it against.
- 2
Choose how rows are matched
Line rows up by position, or pick a key column so each record is matched by its ID regardless of order.
- 3
Review the differences
See added, removed and changed rows, with the exact cells that differ highlighted.
Instant & 100% private — nothing is uploaded
Everything runs locally in your browser. Your files are processed on your own device and are never sent to a server, so there are no upload waits, no size limits from us, and nothing is ever stored or logged.
Frequently asked questions
- How are rows matched between the two files?
- By default they are matched by position: row 2 against row 2, and so on. If rows have been reordered or inserted, choose a key column, such as an ID or email, and each record is matched by that value instead, so a row that simply moved is not reported as both removed and added.
- Does it show which cells changed, not just which rows?
- Yes. For a row that exists in both files but differs, the specific cells that changed are marked, so you can see at a glance whether a price, a status or a name was updated rather than scanning the whole row.
- Can it compare an Excel file against a CSV?
- Yes. Each file is read into a simple table first, so you can compare two CSVs, two workbooks, or one of each. For workbooks with several sheets, you pick which sheet to compare.
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