Use WhatsApp’s click-to-chat link: `https://wa.me/` followed by the full phone number with country code, no plus sign, spaces, or dashes
Example: `https://wa.me/15551234567`
Open the link in your browser
Tap or click Continue to Chat
Send your message without saving the number
On WhatsApp mobile, open the chat tab and use the search bar if the number is already in a recent chat or group
On Android, you can also use the dialer or browser to open a `wa.me` link directly
On iPhone, paste the `wa.me` link into Safari and open it
Use third-party “click to chat” tools only if you trust them