LOCAL ROW CHECK 1.3.0 · offline edition

Compare two CSV exports.
Keep the files on your device.

Find missing keys, review duplicates and blanks, and check the values you choose. No upload, account or Python installation.

1. Choose your files

Left CSVNo file selected Right CSVNo file selected

Both files useUTF-8 CSV · up to 2 MiB and 50,000 data records per file

Export Excel or Google Sheets workbooks as UTF-8 CSV first. Headers must be unique and nonempty.

2. Choose what to compare

Key columns, present in both files

Use one stable identifier, or combine columns such as SKU + Warehouse. Keys are exact, case-sensitive text; spaces are preserved. Shared keys alone do not establish identity.

Values to compare (optional)

Choose a key to see the available columns.

Only unique shared keys are paired. A blank component or duplicated combination goes to review. Values use exact text: 20.00 and 20.0 differ.

Choose two CSV files, or try the example.

Your comparison

For each file: input = only in this file + unique shared keys + rows for review.

File	Input rows	Only here	Shared	Review

Preview

Preview shows up to 20 data rows. The ZIP contains every report row and a manifest with input/output hashes. Reports contain your data; keep them private.

Input hashes and CSV output notes

Output CSVs are UTF-8 with BOM. Formula-like cells receive an apostrophe prefix to reduce spreadsheet execution risk. This changes their CSV text; your original files remain authoritative.