I built a free Nano Banana visual prompt generator! One input → full JSON 🍌

I’ve been experimenting a lot with Nano and Banana lately — and the JSON format can be a bit time-consuming to craft every time, especially if you want perfect structure, lighting, lens type, aspect ratio, etc.

So I built a free tool where you just type your topic (e.g. “neon futuristic sneakers”, “luxury perfume product shot”, “fantasy crystal sword”) and it generates a fully structured Banana-compatible visual prompt JSON.

Try it here → https://www.promptil.com/nano-banana-pro