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UK Address Finder Find and validate UK addresses in real-time Setup address autofill in moments with our autocomplete plugins and address lookup APIs

  • Try it Yourself

Maximum of 15 searches per day

Integrate Address Autocomplete on any website with our Autocomplete Plugin

Or use our Address Autocomplete JSON API directly

See Postcode Lookup for our postcode based address finder tool

Why Use Address Autocomplete?

Rapid Address Entry

Receive address suggestions as you type. Median response time less than 100ms

Fuzzy Search

Handles spelling mistakes, handy if you are unsure how an address is spelt

Word Abbreviations

Accepts abbreviations like rd (Road), st (Street) and wy (Way)

Transposed Letters

Handles accidental switching of letters like Liecester (Leicester)


Limit your address suggestions against a whitelist of any attribute, like post town, outward code or country

Geo Filtering

Limit your address suggestions to a bounding geospatial box defined by you

Why Ideal Postcodes?

Flexible Pricing

Flexible Pricing

Choose between a flexible range of price tiers and licences. No tie-ins, no commitments. Contact us to find a licence that works better for you, or try our API for free

Simple Integration

Simple Integration

Drop in autocomplete functionality on your web pages, CRM, POS tools & ERP systems. We offer free developer support and additional resources to help you get started


Robust Software

We provide high quality and heavily tested software. It can be deployed anywhere and is readily customisable


High Data Quality

Our data is updated daily using Royal Mail's PAF dataset. Get access to the UK's most accurate and reliable address database


Built for Accessibility

Our Address Finder plugin has accessibility standards (WAI-ARIA 1.0, 1.1) and other enhancements built in to cater to visually impaired users

Low latency

Low Latency

Our Address Finder API is designed from the ground up to be fast with median and 99th percentile response times under 20ms and 90ms respectively

Flexible Licensing

As Royal Mail Postcode Address File specialists we provide niche licensing options


Public Sector

Make full use of address data with cost-effective licensing for public sector organisations


Implement tools in your app or client projects. Register and monitor your client’s usage through modern and simple licensing options


Small charities can benefit from cost-effective plans to increase website donations, gift aid registration and to speed up in-person collection

Staff Usage

You can easily integrate our solutions to your internal data tools such as a CRM, Point of Sale system or custom application

Trusted by Many

We work with developers across small businesses and startups through to public and FTSE 100 organisations

Client Logos

Or call our Address Search API directly

Start searching addresses in moments with our ready made libraries

const { Client } = require("@ideal-postcodes/core-node");

const client = new Client({ api_key: "iddqd" });

const response = await client.autocomplete.list({ 
    query: {
        query: "221b bake",
        api_key: "iddqd"