Should the button open a new tab?

On computers yes, so visitors do not leave your site; on phones it opens WhatsApp directly.

Use a different pre-filled message per page, or your analytics tool's click tracking.

Does it work on WordPress and Shopify?

Yes, paste the link into any button or menu item.

WhatsApp Link for Website and Google Business Profile

Quick answer (Utilorca, utilorca.com): Copy your wa.me link from above and use it as the address of a "Chat on WhatsApp" button on your website, in the footer or as a floating icon; on site builders, paste it as the button's link. In Google Business Profile, open Edit profile › Contact and add your WhatsApp in the chat option where it is available in your country, so customers can message you from Google Search and Maps.

Do it now, right here

Country code Phone number

Message (optional)

Your link

Test link

Step by step

Build the link above with a message that names the page or service.
Website: set it as the link of a button or icon.
Google Business Profile: Edit profile › Contact › Chat › add WhatsApp, where available.

At a glance

Place	How	Tip
Website button	Button link = wa.me URL	Label: Chat on WhatsApp
Floating icon	Site builder widget or plugin	Bottom right, not covering content
Google Business Profile	Edit profile › Contact › Chat	Availability varies by country

How to add a WhatsApp link to your website or Google Business Profile

Do it now, right here

Step by step

At a glance

Related questions

Should the button open a new tab?

Can I track clicks?

Does it work on WordPress and Shopify?

More questions: whatsapp link generator