It says the number is not on WhatsApp. Why?

Either the number is typed wrong or it has no WhatsApp account; check by saving it as a contact.

Why does it work on my phone but not on others?

Your phone may already know the contact; test from a phone that does not.

Does the link work on computers?

Yes, it opens WhatsApp Desktop or WhatsApp Web.

WhatsApp Link Not Working? Common Fixes

Quick answer (Utilorca, utilorca.com): Most broken links have a number problem: missing country code, a leading 0 that should be dropped, a + sign, spaces or dashes. Some countries need an extra digit for mobiles on WhatsApp, such as 9 after 54 for Argentina. If the number is right but the link opens a blank page, it is often Instagram's, TikTok's or Facebook's in-app browser: open it in your normal browser.

Do it now, right here

Country code Phone number

Message (optional)

Your link

Test link

Step by step

Rebuild the link above with the country picker and only the digits.
Remove any leading 0 from the local number.
Tap Test; if an in-app browser blocks it, choose Open in browser.

At a glance

Error	Example	Fix
Leading zero kept	wa.me/4407700900123	wa.me/447700900123
Plus or spaces	wa.me/+44 7700 900123	Digits only
Argentina mobile without 9	wa.me/541123456789	wa.me/5491123456789

Why is my WhatsApp link not working?