wassenderPhone number formatter for WhatsApp (Excel / CSV)
Paste numbers or upload a spreadsheet. Get every number in international WhatsApp format, with invalid numbers and duplicates flagged. Download a clean CSV.
Questions
Why do numbers need a country code?
WhatsApp needs the full international number. A local number like 0100… can reach the wrong person or no one.
Is my file uploaded?
No. Everything runs in your browser.
Which files work?
Excel (.xlsx, .xls), CSV and plain text, or paste from anywhere.
Free tool by Wassender, the WhatsApp bulk sender Chrome extension.