Add a WhatsApp Button to Your Site in 2 Minutes (Free HTML Generator!)

Add a WhatsApp Button to Your Site in 2 Minutes (Free HTML Generator!)
1 WhatsApp Number
? Put the number with the country code (55 for Brazil) and the area code.
Example: +55(41)99526-6655
2 Widget Header
? Put the number with the country code (55 for Brazil) and the area code.
Example: +55(41)99526-6655
3 Message
?The message you want pre-filled (leave it blank for none)
4Code:
Cabeçalho da Conversa
Mensagem da conversa!
Cabeçalho da mensagem
Texto da mensagem!

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How does it work?

It's just some simple CSS using media queries to show two different links: one that opens WhatsApp Web on bigger screens, and one that uses the WhatsApp API on phones.

Wordpress:

I'm going to make a plugin that adds this automatically very soon (I'd say in a week or two.)

For now, you can paste the code into your site's footer:

Appearance > Editor

Editor de Aparência

Go to the footer.php file and paste it at the very top.

Don't change anything else in the file. Don't delete or replace anything unless you know what you're doing.

Editando footer Wordpress

Don't forget to hit update on the file.