Every row accounted for.

Source: contacts.csv

6 input rows = 4 retained + 1 duplicates + 1 needing review.

Before importing

Review every “same key, different values” entry in duplicates.csv. The first record is retained, not necessarily the most correct record. Blank-key rows are in review.csv.

Machine CSVs preserve cell values after your chosen cleanup. For spreadsheet viewing, use spreadsheet-*.csv copies, which prefix formula-like values with an apostrophe. Spreadsheet import behavior varies; import columns as text when in doubt.

Blank cells

Repeat this cleanup

Reuse recipe.json with the next export. Source files are never modified.

Source fingerprint

Processed locally. No network requests, account or API key.