Drop in two CSV files and get a clear report of every difference - added rows, removed rows, changed values (old → new) and duplicate keys - in seconds.
Open both files, line up the columns and scroll - that is how most people compare two CSV exports, and it is exactly where mistakes hide. A moved row, a changed price, a duplicated ID: any of them is easy to miss across hundreds of lines. This tool does the matching for you and reports only what actually differs.
Upload an old file and a new file and you get a summary first - how many rows were added, removed, changed and duplicated - then the detail behind each one, including which column changed and the old and new value. No formulas, no VLOOKUP, no pivot tables.
Each row is matched on a key column (an id, SKU, account number, or the first column when there is no obvious key). A key only in the new file is Added; a key only in the old file is Removed; the same key with different values is Changed; the same key twice in one file is a Duplicate.
Yes - you can compare two files and see the full summary plus the first 15 differences free, with no signup. A subscription unlocks the full detailed report and CSV export.
No. Your data is processed to generate the report and is not retained.
They should share a key column and the fields you want compared. Extra columns are fine - the tool matches on the key and compares shared fields.
It is built for everyday exports - thousands of rows compare in seconds.
Related tools: spreadsheet diff tool · what changed between two CSV files
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