Quick answer: Upload the sheet, map columns, and read the validation report — phone normalization, duplicate flags, error rows — before anything is written. Apply commits it; one-click rollback undoes it. Files cap at 5,000 rows; split larger rosters.
How it works
Validation is a dry run: the directory is untouched until you approve the report.
+880 normalization reconciles the three phone formats every real spreadsheet contains.
Rollback reverses an entire import as one action — bad mapping is a re-do, not a catastrophe.
Frequently asked questions
What about 8,000 members?
Two files. The 5,000-row cap keeps validation fast and reviewable.
Are updates supported, not just creates?
Yes — matching rows update existing members; the report shows create vs update counts.