Free AI Image Prompt Generator
Build a detailed AI image prompt in seconds. Choose a subject, a style, the lighting, the framing and an aspect ratio, pick the model you use, and copy a ready-to-paste prompt. It is a simple template tool that runs in your browser — no AI API, no account, no limit. The building blocks come from what consistently works in our tested AI photo prompts.
Your prompt
How to get a better prompt
- 01Describe one clear subject first, then add details. Models weigh the start of a prompt more heavily.
- 02Pick lighting before style: lighting changes realism more than any other word.
- 03Use a lens or framing term (85mm, overhead, wide shot) instead of vague words like “nice angle”.
- 04Keep the negative prompt short — three to five things you really want to avoid.
- 05Generate two or three images, then change one option at a time to learn what moves the result.
FAQ
What is the best free AI image prompt generator?
The best free generator is one that gives you a complete, structured prompt you can edit. Ours assembles subject, style, lighting, framing, aspect ratio and a negative prompt, then formats it for the model you use. It runs in your browser, needs no account and has no usage limit.
Is there a free prompt generator?
Yes. This prompt builder is completely free and requires no sign-up. It does not call any AI service: it combines proven building blocks from our tested prompts into one optimized prompt. Copy the result into Gemini, ChatGPT, Grok, Midjourney or Flux and adjust the details to taste.
Does this AI photo prompt generator work for Gemini and ChatGPT?
Yes. Choose Gemini (Nano Banana) or ChatGPT as the target model and the builder writes the prompt as full sentences, which those chat-based image models follow best. For Midjourney it switches to comma-separated keywords and adds --ar and --no parameters automatically, so the same idea works everywhere.
Why does the builder not use AI to write prompts?
Because a predictable template beats a random rewrite when you want control. Every option maps to wording that consistently changes the image, like 'soft window light' or '85mm lens'. You see exactly what each choice adds, can edit any part, and nothing you type is sent to a server.
Want to learn the structure behind it? Read our guide on how to write AI image prompts, or browse Gemini photo prompts and ChatGPT image prompts.