Question: Looking for a free AI image generation tool with optional credits for advanced features.

If you want a free AI image generation tool with credits for premium features, getimg.ai is a good option. The service offers an AI Generator for creating images from text prompts, Image to Video conversion, and a Real-Time AI Generator for fast image generation. It also has features like ControlNet for guided AI generation, API access and support for more than 80 community-trained AI models. Getimg.ai charges in credits, with different levels depending on your needs, and you can buy credits in bulk.

Another option is starryai, an AI art generation tool that can turn your prompts into images. It's got a big library of styles and the ability to upscale and refine images. You can generate up to 25 images a day for free with no watermark, and you can use the images for personal and commercial purposes. The service also has a powerful API for developers and lots of options for customization, so it's good for both casual and serious users.

For those who want to generate high-resolution images quickly with no fuss, ImgGen is a free online AI image generator. It can generate images up to 4096 x 4096 pixels from text prompts without requiring you to sign up or add a watermark. ImgGen also has a collection of photo editing tools, including AI headshots generation, background removal and color correction, so it's good for creative and professional use.

Last, Artimator is a free AI art generator that uses multiple AI models to create images from text prompts. It's got advanced controls for fine tuning prompts and turning photos into different styles. You can generate images for free with no limit on the number, and you can download high-resolution images. Artimator is good for beginners and pros. You can also pay for premium features with a one-time payment in coins, so it's a good option if you want to pay for what you use.