Phase.art

Phase.art is free to start, with free credits for new users, though everything you generate draws from those credits, so heavy use may run into a ceiling.

Phase.art is an AI image generator that turns text prompts into images in about 4 seconds, which makes trying many variations of a prompt quick.

The tool offers a variety of Flux models, each producing a different look, plus advanced settings for adjusting results.

It also covers AI inpainting for editing parts of an image.

One catch: the differences between the Flux models are not explained clearly, so you will likely learn which one suits your idea by testing them.

If you want a fast text to image tool to experiment with before paying anything, Phase.art is a low-risk place to start.