Compare two lists
Quick help
Compare the selected columns from two CSV files. Each unique key appears once, with Both, First only or Second only. Case-sensitive mode keeps whitespace. Ignore mode trims edges and ignores case. This is a set comparison, not a duplicate count or fuzzy match.
- Paste or load your data and choose the options.
- Prepare the result and review the preview.
- Download results or print. Export a draft before closing.
What it does not do: No uploads, cloud sync or automatic storage. No Excel workbooks. No guessing dates or address verification.
Compare the selected columns from two CSV files. Each unique key appears once, with Both, First only or Second only. Case-sensitive mode keeps whitespace. Ignore mode trims edges and ignores case. This is a set comparison, not a duplicate count or fuzzy match.
Limits: 1 MB per input file, 10,000 data rows, 100 columns. Mail merge: 500 recipients. Preview tables show the first 100 rows. Downloads include all rows.
CSV downloads prefix cells that could be spreadsheet formulas with an apostrophe, including negative numbers. Check types when importing. JSON and draft exports preserve the original text. UTF-8 and comma-separated CSV only.
Import is kept in this page's memory. The original profile file is unchanged.
Preview / results
Enter your details on the left to prepare your result.