CSV Diff & Exception Review

Compare two CSV exports locally and review added, removed, and changed rows.

Compare recurring CSV exports without formulas, scripts, or uploads. CSV Diff & Exception Review helps you quickly understand what changed between a previous CSV file and a current one. Choose the column that uniquely identifies each row, run the comparison, and review only the items that need attention. Find: • Added rows • Removed rows • Changed field values with clear before/after values • Duplicate IDs • Missing IDs • Unchanged rows when you need them Download the comparison as a review CSV for further analysis, reporting, or record keeping. 100% LOCAL & PRIVATE Your CSV contents are processed entirely inside your browser and are never uploaded by the extension. No account connection, OAuth, Google API access, browsing-history access, or host permissions are required. Useful for recurring: • Supplier and inventory exports • Product catalogs • CRM exports • Operational reports • Agency/client datasets • Spreadsheet exports • Other CSV-based workflows Simple workflow: 1. Choose the previous CSV. 2. Choose the current CSV. 3. Select the unique ID column, such as SKU, product ID, email, or order ID. 4. Compare. 5. Review the exceptions and export the results. Current version supports CSV files and one unique ID column.