Private CSV membership workbench
Choose which CSV rows to hand off.
Compare exact keys against an allow or exclude list, review every source row, then save adopted, excluded and held CSVs.
Choose two CSV files
Imports only key mapping and mode. Recheck shared columns and comparison options every time.
Matching keys
Choose one to three corresponding columns. Matching uses exact strings.
TargetCriteria
Membership and comparison
Target columns to include in recipient CSVs
Only selected target key columns are included by default. Review before adding internal notes.
Private review of every source row
| Source row ID | Partition | Reason |
|---|
Check headers, counts and formula cells before saving
Right non-key columns, source row IDs and reasons never enter recipient CSVs. Source files remain unchanged.
CSV contents, filenames and results stay in this browser and disappear when this page closes.
Matching boundaries
- 001 and 1 are different keys. Duplicate right keys are treated as a set with a warning and never multiply target rows.
- Blank target keys are held. Blank criteria keys are ignored with a warning. Similar-looking names are not matched automatically.
- Formula-like cells gain a leading apostrophe only in exported CSVs. The recipient sees that apostrophe in the value.