UK Address Autocomplete & Postcode Lookup for Forms & WooCommerce
Postio is a UK address, email, and phone validation API. This plugin drops UK address autocomplete onto your existing forms — automatically — so customers fill billing, shipping, and contact addresses in two keystrokes instead of twenty. Automatic, where your builder has an address field Paste your
Postio is a UK address, email, and phone validation API. This plugin drops UK address autocomplete onto your existing forms — automatically — so customers fill billing, shipping, and contact addresses in two keystrokes instead of twenty.
Automatic, where your builder has an address field
Paste your key and these wire themselves. No classes, no snippets, no per-form setup:
- WooCommerce — both Block Checkout (the new Cart / Checkout block) and the classic shortcode checkout, plus My Account → Addresses.
- Gravity Forms — every Address field on every form.
- Fluent Forms — Address field, multi-form-safe.
- Forminator — Address field with all sub-inputs.
- WPForms — Address field across every form. (The Address field is part of WPForms Pro; on WPForms Lite, use the two-minute route below.)
Two-minute setup, everywhere else
Some builders have no address field at all — there’s nothing for us to detect, because there’s nothing there. You tell us which of your fields are which by adding a class to each one, and it works exactly the same from then on:
- Contact Form 7
- Ninja Forms
- Elementor Forms (part of Elementor Pro)
You don’t have to go hunting for the classes. Settings → Postio detects which of these you have installed and prints the exact snippet for your builder on the screen, ready to copy.
Anything else
Custom mappings at Settings → Postio bind any search box to any set of output fields by CSS selector. That covers page builders, bespoke themes and hand-written forms — anything that renders ordinary HTML inputs.
Plus a block ( Postio Address Finder ) that drops onto any page in the block editor for one-off address pickers.
Why Postio
- Royal Mail PAF + Ordnance Survey — the same dataset every UK address vendor uses, served from edge workers in two regions for sub-50ms typeahead.
- No accuracy compromise — you get the same dataset whether you spend £20 a month or £2,000.
