Get started with the what3words API

New to what3words? Use our step by step guide to find out how to tailor what3words to your needs.

Start building

what3words API

The what3words API is a fast and simple interface that allows you to convert 3 word addresses to coordinates and vice versa. It features a powerful AutoSuggest function, which can validate user input and limit it to certain geographic areas. We offer a variety of libraries, including Java, JavaScript, Swift, Python, Node.js, PHP and more to make our API easy to integrate for your business.

Get an API KeyReference docs

Fast track API integration

Recommended API tutorials

View all tutorials


Our API is designed to work with the speech recognition technology of your current voice supplier. If your voice supplier needs help recognising 3 word addresses, don't hesitate to get in touch.
The what3words API translates 3 word addresses to GPS coordinates. It does not provide map or routing data. However, our API does provide a layer that can be used with any mapping software, meaning it can work well as part of your existing mapping, addressing and route optimisation solutions.
The what3words API has a grid-section function (learn more at: This returns grid lines for the area supplied in GeoJSON format, which can be directly added to a web map or desktop GIS such as QGIS. To add the what3words grid to a Google Map, watch this short tutorial:
View all FAQs