If you're looking for a free online tool to generate photorealistic human faces in seconds, Face Studio is a good choice. The AI-powered tool lets you pick gender, age and ethnicity, and you can also use batch generation and an API for building face generation abilities into your apps. Face Studio offers a free tier with 300 requests per day, so it's good for small-scale use.
Another good option is Lucidpic, which can generate hyper-realistic images for avatars, stock photos and custom characters. It comes with tools like an AI Photostudio and custom controls so you can fine-tune the look of the images you generate. Lucidpic offers a free tier for generating up to three images, and paid subscription plans for heavier use.
If you want something more personal, ImagineMe generates images based on text prompts using private AI models trained on your photos. The service requires a set of photos to get started, but subsequent generations take just seconds. ImagineMe offers a range of styles, including photorealistic, anime and comic book-inspired art, so it's good for custom headshots or unique social media profiles.