Open a browser on your phone or computer
Type `https://wa.me/` followed by the full phone number with country code, without spaces or symbols
Example: `https://wa.me/15551234567`
Press enter
Tap or click Continue to Chat
The WhatsApp chat will open without saving the number
Use the WhatsApp Click to Chat format
Type `https://api.whatsapp.com/send?phone=` followed by the full phone number with country code
Example: `https://api.whatsapp.com/send?phone=15551234567`
Open the link to start the chat
On iPhone, use Siri Shortcuts or a browser link to open a chat without saving the contact
On Android, use a browser link or a third-party dialer/chat shortcut app that opens WhatsApp directly
If the number is already in a group with you, open the group chat and tap the number to message them directly
If you need to message the number often, create a browser bookmark for the chat link instead of saving the contact