Add Australian address autocomplete to your checkout in 10 minutes

11 July 2026 · 5 min read

Manual address entry is one of the quietest killers of checkout conversion: typos, wrong postcodes, and failed deliveries all start at the address field. Autocomplete fixes it — and with WattleAddr you get it without routing your customers’ keystrokes through an offshore ad platform.

1. Get your keys

In the console, create a workspace and copy two keys: a publishable key for the browser and a secret key for your backend. Lock the publishable key to your checkout domain so it can’t be used anywhere else.

2. Drop in the widget

Include the script and attach it to your existing address input. That’s the whole integration:

const wa = new WattleAddr('waddr_pk_live_…');
wa.attach('#shipping-address', {
  state: 'NSW',
  onSelect: (addr) => {
    form.suburb.value  = addr.components.locality;
    form.state.value   = addr.components.state;
    form.postcode.value = addr.components.postcode;
  },
});

3. Autofill the rest of the form

When a customer picks a suggestion, you get a fully structured record — unit, street number, street, locality, state and postcode — so you can populate every field at once and skip three inputs entirely.

Why session billing matters here

Checkout autocomplete fires a request on every keystroke. WattleAddr bills per session, not per keystroke: the whole “find one address” interaction counts as a single lookup, so a busy checkout stays affordable.

• Fewer failed deliveries from bad addresses
• Shorter forms, higher conversion
• No customer data sent overseas