Address autocomplete is the fastest way to capture an accurate UK address. As the customer types, your form suggests matching, verified addresses — they tap once, and you store clean structured data with no typos and no missing fields.
Why autocomplete wins at checkout
- Cuts the address block from 5+ fields to a single search
- Dramatically faster on mobile, where most carts are abandoned
- Verified PAF data means deliverable addresses every time
- Consistent formatting for shipping labels and your CRM
Measurable impact on conversion
Reducing form friction is one of the highest-leverage checkout optimisations available. See our guide on how postcode lookup improves conversion rates for the numbers behind it.
Part of the postcode lookup hub
Explore the full postcode lookup API hub, including the address lookup API and address validation.
Frequently asked questions
What is address autocomplete?
Address autocomplete suggests complete, verified addresses as a user types, so they can select rather than fill out every field. AutoPostcode's suggestions come from Royal Mail PAF data.
Does autocomplete improve conversion?
Yes — fewer fields and keystrokes reduce friction and cart abandonment, especially on mobile where typing a full address is slow.
Will it work with my checkout?
Yes. Use the WooCommerce/WordPress plugin for a no-code setup, or wire the REST API into any custom checkout.
Ready to get started?
Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.