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Find missing rows in two CSV files
Compare exports by a shared ID, SKU, email or name. See records found in only one file and flag duplicate or blank keys for review. Your files stay on your device: the comparison runs entirely in your browser.
1. Choose two CSV files
Limits: up to 500 data rows and 1 MiB per file. UTF-8 CSV with a single header row and comma delimiters. This tool compares key presence, not differences in every column. Names are not guaranteed to uniquely identify people.
Choose files to begin.
Try with fictional examples: CSV A · CSV B. Select the sku column in both files.
2. Review the differences
| Status | File | Row | Matching key |
|---|
Duplicate or empty matching keys are excluded from automatic “missing” conclusions and listed for manual review. Downloaded CSV uses spreadsheet-formula protection for safety.
Need a reviewed report with changed quantities?
The free tool checks key presence. For a documented reconciliation of two stock/order exports, changed fields, ambiguous matches and a clear audit trail, see our CSV Inventory Reconciliation from £19 for a small pilot. Final scope and price are agreed in writing before payment; no payment is collected by this tool.
Request a reviewed CSV quote by email · Pilot and standard service details from £19