01 / Cross-format comparison
Use any supported format pair
Compare Excel (XLS, XLSX, XLSM, XLSB, and their templates), OpenDocument (ODS), and Apple Numbers workbooks in any pairing, such as XLSX against ODS or Numbers against XLSX. A CSV or TSV export can be compared with one sheet of a workbook too: the first sheet by default, or the one you choose under Compare with sheet.
Sheets, rows, and stored values provide the shared model, so unrelated workbook container structures do not become the result.
02 / Cross-format comparison
Review stored values in context
Choose a sheet and scan matched rows side by side with their row number in each workbook. Rows are matched by their content, so an inserted row is one added row and the rows after it still match.
When rows were sorted differently, choose an ID column under Match rows by, or type several under Key columns. Rows with the same key are then compared wherever they are.
03 / Cross-format comparison
Keep the comparison boundary explicit
Across formats, Diff Anything compares stored cell values. Formulas are compared only between two workbooks of the same format, so they are not part of a cross-format result. Formatting, charts, macros, and workbook layout are not compared.
A clean value comparison is useful evidence for a data handoff, but it does not prove that calculation logic, styling, automation, print setup, or editing behavior survived the format change.