WhatsApp number formatter
Messy list in, clean E.164 numbers out: one per line, ready for WhatsApp, CSV imports and CRM campaigns. Nothing is uploaded.
One number per line, as exported from your CRM, phone or spreadsheet. Spaces, dots, dashes and parentheses are fine.
Numbers starting with 0 get it. Numbers already international (+, 00 or full code) pass through untouched.
E.164 format, one per line: paste it into a spreadsheet, a CSV import or your campaign tool.
Why WhatsApp needs E.164 numbers
WhatsApp identifies every account by its full international number in E.164 format: country code plus number, digits only, like 33612345678. A wa.me link or an API call with a local number (06 12 34 56 78) simply fails.
Real-world lists are never clean: leading zeros, 00 prefixes, spaces, dots, parentheses, a mix of local and international entries. This tool normalizes all of it, line by line, and tells you which entries were too short to be real numbers, before a single message is sent.
A clean list is step one of a reactivation campaign. Step two is the conversation: re-engaging dormant CRM leads on WhatsApp is where response rates of 32 to 60% live, and WhatSetter imports exactly this kind of list by CSV or Google Sheets and runs the conversations for you.
Frequently asked questions
Is my list uploaded anywhere?
No. Formatting runs entirely in your browser: your numbers never touch our servers or anyone else's.
What happens to numbers starting with 0?
The leading 0 is a national prefix. The tool replaces it with your default country code: 06 12 34 56 78 with code 33 becomes +33612345678.
What about numbers that already have a country code?
Entries starting with +, 00 or an international code pass through with only the formatting cleaned. The default code is never forced on them.
Do landlines work on WhatsApp?
A landline can hold a WhatsApp Business account activated by voice call, but most landlines are not on WhatsApp. Formatting them is still useful for other channels.
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