Free AI prompt builders

Each image model reads prompts differently. Midjourney wants short comma-separated layers with parameters at the end, Stable Diffusion wants keywords plus a negative prompt, and ChatGPT's GPT Image 2 wants a complete sentence. These three builders put your choices — subject, style, lighting, framing, palette and aspect ratio — into the right grammar for each model, so you can copy a working first draft in seconds. They run entirely in your browser: no login, no limits, nothing sent to us. Every style option links back to the matching hub in the prompt library, and any library prompt can be opened in its builder with Remix in builder.

• Midjourney Prompt Builder

  Subject first, parameters last — assembles comma-separated layers with correct --ar and --stylize syntax for Midjourney v7.

• Stable Diffusion Prompt Builder

  Keyword-style SDXL prompts plus a baseline negative prompt and suggested steps, CFG and sampler to start from.

• ChatGPT (DALL·E) Prompt Builder

  Turns your choices into the full-sentence brief GPT Image 2 reads best, with orientation and a no-text guard built in.

Builder or library?

A builder gets you a correctly structured first draft for any subject. A library prompt gets you a finished one: written for a specific model, with its exact settings, an example image, usage notes and variations. Start from the Midjourney, Stable Diffusion or ChatGPT (DALL·E) library when one is close to what you want, then remix it here and change one layer at a time.