Rowkite

I’m the developer of RowKite, a browser-based tool for comparing and organizing Excel files. You choose which columns identify matching records and which columns to compare. For example, match order lines by Order ID and Product Code, then compare Quantity and Amount. Rows can appear in a different order in each file. Review changed, added, and missing records, then download a complete Excel report. Files are read, compared, and exported locally in your browser. Spreadsheet contents are never uploaded to a server, and your original files stay unchanged. RowKite is currently free, with no sign-up required. Sample files are available to try it out.