Back-in-stock alerts on WhatsApp for Shopify: how they work and how to set them up
How to send back-in-stock notifications on WhatsApp from Shopify: the shopper's request, how it is recorded per variant, when the alert sends, and setup steps.
Available nowPro plan
One product button. Two smart actions.
The Smart Product WhatsApp Button sits on your product page and follows the variant the shopper selects. If the variant is available it reads Order via WhatsApp. If it is sold out it reads Notify me when back in stock. Either way, one tap opens WhatsApp with the product details already written.
How it behaves
The button uses the variant's real availability in Shopify, not a raw inventory number, so it stays correct for products that continue selling when out of stock.
| Selected variant | Button | What opens in WhatsApp |
|---|---|---|
| Available | Order via WhatsApp | An order message with the product, variant, price, SKU and link |
| Unavailable | Notify me when back in stock | A back-in-stock request for that variant with a request reference |
No forms for the shopper
The shopper does not fill in a form or create an account. The message already names the product and the variant they chose, so the conversation starts with everything you need to answer.
Set up from the Theme Editor
- Open your product template in Shopify Theme Editor.
- Add the WhatsApp Product Order Button app block where you want it, usually under Add to cart.
- Edit the two button texts and the two opening messages, in your store's language.
- Adjust colors, size, alignment and which devices show it, then save.
Made for every screen and language
- Responsive on mobile and desktop, with a setting to show it on one or both.
- Button texts and messages are yours to write, so they match your store language. The default unavailable text in Arabic is أخبرني عندما يتوفر المنتج.
- Optional display hours, in the visitor's local time.
- Uses your store's WhatsApp number, or a different number for product orders.
What you can configure
- Button texts
- Order via WhatsApp and Notify me when back in stock, both editable
- Opening messages
- One for orders, one for back-in-stock requests
- Style
- Colors, radius, height, padding, icon, font size and weight, alignment
- Visibility
- Desktop, mobile or both, with optional display hours
Requirements
- Pro plan
- Online Store 2.0 theme (app blocks)
- Your WhatsApp number saved in the app
- WhatsApp connected to receive back-in-stock requests
What your customers receive
Order message (variant available)
Hi, I would like to order this product:
Classic Hoodie
Variant: Black / Large
Price: 49.00 USD
SKU: HD-BLK-L
https://example-store.com/products/classic-hoodie10:42 ✓✓
Back-in-stock request (variant unavailable)
Hi, please notify me when this product is back in stock:
Classic Hoodie
Variant: Black / Large
https://example-store.com/products/classic-hoodie
Request code: KT4210:42 ✓✓
Frequently asked questions
How does the WhatsApp product button work?
It is an app block on the product page. It reads the selected variant's availability and shows Order via WhatsApp or Notify me when back in stock. Tapping it opens WhatsApp with the product details filled in.
Is the product button included in the Free plan?
No. The Smart Product WhatsApp Button is a Pro feature. The Free plan includes the floating WhatsApp widget.
Does the shopper place a Shopify order by tapping it?
No. It starts a WhatsApp conversation with the order request. You complete the sale with the customer in the chat or send them to checkout.
Does it work with variants?
Yes. The button changes as the shopper switches variants, and the message names the exact variant.
Can I change the button text and colors?
Yes, from the Theme Editor: both button texts, both messages, colors, size, alignment and device visibility.
Related guides
Order via WhatsApp on Shopify product pages: the smart product button explained
How a product-page WhatsApp button works on Shopify: Order via WhatsApp for available variants, Notify me when back in stock for sold-out ones, and how to add it.
Shopify product demand tracking: using back-in-stock requests to decide what to restock
Use back-in-stock requests as a demand signal on Shopify: waiting requests per product and variant, how to read them, and how to prioritise restocking.
WhatsApp button code for Shopify themes: Dawn, Sense, Refresh, Craft, Studio and Ride
Two ways to add a floating WhatsApp chat button to Dawn, Sense, Refresh, Craft, Studio or Ride: a no-code app embed, or a copy-paste HTML and CSS snippet with your phone number.
Related features
- Back-in-stock WhatsApp alerts — Shoppers request an alert on WhatsApp for a sold-out variant and get a message when it returns.
- Product Demand analytics — See which products and variants customers are waiting for, before you restock.
- Floating WhatsApp chat widget — A customizable WhatsApp button for your storefront: the homepage on Free, every page on Pro.
Ready to put WhatsApp to work on your store?
Start with the free widget. Upgrade to Pro for order messages, cart recovery, the smart product button, back-in-stock alerts and Product Demand.