Uploads a sheet of numbers, checks which are on WhatsApp, and gives you a clean list. Nothing is ever messaged.
Add up to 5 sheets (.xlsx, .csv or .txt). Columns that mean the same thing — like “name” & “full name”, or “mobile” & “phone number” — are detected automatically and combined into one sheet with all the data. Drag the rows to reorder — column order follows the top sheet.
Bigger bursts + shorter rests = faster, but a little riskier for your number. Longer rests = safest.