AI Prompt Generator – Free ChatGPT & Midjourney Prompt Builder

Writing a good AI prompt takes more than just typing a question — the best results come from giving the AI clear context, format, and style. This free prompt generator does that for you. Pick ChatGPT to build a structured prompt with role, task, tone, and constraints, or pick Midjourney to build an image prompt with style, lighting, and aspect ratio — then copy it straight into the AI tool of your choice.

How to use:

1. Choose the ChatGPT prompt or Midjourney prompt tab.
2. Fill in the fields — for ChatGPT, describe the task, context, and tone; for Midjourney, describe the subject, style, and lighting.
3. Watch the prompt build itself in the box below as you type.
4. Click Copy prompt and paste it into ChatGPT or Midjourney.

FAQs:

• Is this free to use? Yes, there’s no sign-up or cost.
• Do I need an OpenAI or Midjourney account? No — this tool only builds the prompt text. You paste it into ChatGPT or Midjourney yourself.
• What’s the –ar and –v at the end of the Midjourney prompt? --ar sets the image’s aspect ratio (like 16:9) and --v sets which Midjourney model version to use.
• Can I edit the prompt after it’s generated? Yes — the copied text is plain text, so you can tweak it in ChatGPT or Midjourney before running it.