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PromptifyLab

Image Prompt Builder

Subject, detail, setting, medium, style, lighting, shot, lens, palette, mood and aspect ratio — filled in once, then emitted in the correct syntax for Midjourney, ChatGPT/DALL·E, Stable Diffusion or Flux, or Firefly. Each model gets its own formatting, because a prompt that is not model-specific works properly nowhere.

The one thing the picture is of. Be concrete: "a ceramic pour-over cone", not "coffee gear".

Prompt



      

      

    

  


  
Nothing leaves your browser. No images are generated here — this writes the prompt, you take it to the model.







How it works


    

  • Midjourney gets subject-first ordering with --ar, --s and --no parameters.
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  • ChatGPT and Firefly get full sentences, which survive their internal prompt rewriting better than comma lists.
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  • Stable Diffusion and Flux get weighted comma tags plus a separate negative prompt.
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  • Notes under the output tell you what each model does differently.
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What it does not do


Every tool on this site says this plainly, because a tool that pretends to do more than it does costs you more than it saves.


    

  • It writes prompts. It does not generate images — take the prompt to your model.
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  • Style by artist name is deliberately not offered. Describe the qualities instead.
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  • No model handles precise counts or long text in images reliably yet.
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Nothing you type here leaves your browser


There is no account, no server and no logging. The whole tool is JavaScript running on your own machine — close the tab and it is gone. You can check: open your browser’s network tab and use it.




Questions people ask




Why do my AI images look generic?
Because the prompt specified only the subject, so the model chose lighting, framing, medium and mood — and its choices are the average of its training data.




Do I need a different prompt for each model?
Yes, and that is what this does. The same words produce meaningfully different images across Midjourney, GPT Image and Stable Diffusion.




What is a negative prompt?
A list of what to keep out, supported by Stable Diffusion and Flux. Midjourney uses --no instead; ChatGPT and Firefly have no equivalent.







    

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    Image Generation
    

    Subject, light, framing and style — in the order each model actually reads.
    

        7 prompts
  
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    Product Photography
    

    Lifestyle scenes and backgrounds, and where the honesty line sits.
    

        7 prompts
  
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Free, no sign-up. Last updated 18 September 2026.