HeyPhoto is a free AI photo editor that uses artificial intelligence to make various changes to photos. Users can modify faces by making them smile, changing hairstyles, adding emotions, makeup, and even edit age. The service is available online and can be accessed with just a few clicks.

To use HeyPhoto, simply visit the website and upload a photo. The AI will automatically detect faces in the photo. Users can then choose from a range of editing tools to make desired changes to the faces. The service is intuitive and requires no special skills. Once the desired changes are made, users can save or download the edited photo.