Fontjoy helps users pair fonts together by pairing a generator that uses machine learning to suggest harmonious combinations. It uses a neural network to generate combinations of fonts with a pleasing contrast while sharing an overarching theme. Users can click buttons to generate new pairings, lock fonts they like, or manually select fonts.

The tool aims to make font pairing simple through a data-driven approach. It lists many different fonts that can be used. In summary, it’s a font pairing generator that uses machine learning to suggest harmonious combinations.