To create a link with your phone number, use this link: https://wa.me/number and replace the word "number" with your full phone number in international format. Do not include parentheses or dashes.
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​https://wa.me/5591122334455 ✅
​https://wa.me/+055-(9)1122334455 ❌
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You can also create a link with a predetermined message which will automatically appear as an option for the customer. That way your clients can save time when messaging you. 

Here's how:
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​https://wa.me/number?text=message
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Replace "number" with your full WhatsApp phone number, and replace "message" with your predermined message. Use %20 between words to include a space.

Example:
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​https://api.whatsapp.com/send?phone=5591122334455text=Hi,%20I%20saw%20an%20ad%20on%20Facebook%20and%20I'd%20like%20to%20learn%20more%20about%20your%20products

So far, we have told you how to create the link manually. To do it automatically with a tool and simplify the process, we recommend our WhatsApp link generator that you can use for free.

You can also use this or this other generator to create a QR Code.