1. Choose your files
Use UTF-8 CSV, TSV or XLSX. Select the worksheet and check whether the first row contains unique column names.
Compare CSV & Excel files
Choose two tables, match a column, then inspect the differences.
Files stay in your browserTable A — before
This worksheet includes cached formula values. They are compared as displayed; formulas are not recalculated.
Table B — after
This worksheet includes cached formula values. They are compared as displayed; formulas are not recalculated.
Comparison settings
These options apply to matching keys and cell values.
Choose a file or load the example to begin.
Comparison results
Choose a file or load the example to begin.
Remove duplicate keys
Duplicate keys are listed separately. Choose which row to keep, download a cleaned table, then import it to compare again.
CSV export contains values only. Cells starting with spreadsheet formula symbols receive a leading apostrophe. Original files are not changed.
File contents stay on your device. Download results before closing this page.
How to compare two tables
2. Select the same identifier
Choose a customer ID, product code or other unique key in each table. Column names can differ for the selected key.
3. Inspect and export
Filter additions, removals, changes or common rows. Inspect duplicate keys separately and export the selected view.
What is compared
Columns are matched by their names. The selected key identifies rows; keys must be non-empty. Excel displayed values are compared, including cached formula results. Formulas are never calculated here; formatting, charts and macros are not compared.