Free online csv & excel tools

Merge, compare, de-duplicate, clean and convert spreadsheets. Private, no installation, files deleted automatically.

Combine several CSV or Excel files into one, lining up columns by name.

Remove duplicate rows, by the whole row or by chosen columns such as email.

See which rows are only in the first file, only in the second, or in both.

Trim spaces, remove empty rows and columns, fix encoding and tidy text case.

Convert between CSV, Excel (.xlsx) and tab-separated, or change the delimiter.