This free AI prompt generator turns a plain description of a task into four ready-to-paste prompts for ChatGPT, Claude, Gemini, Grok, Perplexity or any other chat model. Each prompt uses a different technique, and the last one combines role, context, task, constraints and output format into a single block. It is free, needs no signup, and you can generate as many sets as you like.
How to use the AI prompt generator
- Describe what you want the AI to do in a sentence or two, for example "write launch-day ad copy for a project management app aimed at agency owners".
- Choose a use case: marketing copy, SEO content, email and outreach, social media, brainstorming and strategy, coding, analysis and research, or general.
- Pick the AI model you will paste the prompt into.
- Click Generate Prompts and read the four prompts that come back.
- Copy the one that fits, or click Copy All to keep the whole set. Highlighted [placeholders] mark details you should fill in yourself.
- Paste it into your AI tool, run it, and adjust a line or two if the answer is not quite right.
The four prompts you get each time
A single generic prompt rarely fits every task, so each run gives you four versions to compare.
Chain-of-thought prompt
Asks the model to reason step by step before answering. Use it for analysis, planning, maths, debugging or any task where a rushed answer tends to be wrong.
Role-play prompt
Assigns the AI an expert role, such as a senior copywriter or a data analyst. A clear role sets vocabulary, depth and point of view, which helps most with writing and advice tasks.
Structured-output prompt
Asks for a specific format: a table, a numbered list, sections with headings. Use it when you will paste the result somewhere else and need it to arrive in a usable shape.
Refined prompt
The one to try first. It merges a role, the context, the task, explicit constraints and the output format into one paste-ready block. If you only copy one prompt, copy this one.
The prompt formula behind every result
Above the prompts the tool shows the formula it works from: Role, plus Context, plus Task, plus Format. Once you see it a few times you can write strong prompts without a generator. Most weak prompts are missing context (who the audience is, what you already have) or format (how long, in what structure). Filling those two gaps does more than any clever wording.
Model-specific tips for ChatGPT, Claude, Gemini, Grok and Perplexity
The model you pick is written into the prompts, and a short tip for that model appears under the results. For example, Claude responds well to instructions wrapped in XML-style tags, Gemini benefits from an explicit length and format, and Perplexity works best when you ask for sources and recent data. Choose "Any model" if you switch between tools; the role, context, task and format structure works everywhere.
Copy as API JSON for developers
If you call a model from code, Copy as API JSON puts the first prompt in the set into a standard chat request body with a model name and a messages array. Paste it into your request, change the model ID to the one your account uses, and send it. The tool itself does not call OpenAI, Anthropic or Google for you.
What this prompt generator is and is not built for
It is a text prompt generator for chat assistants. It does not create images or video, and it is not tuned for image prompts in Midjourney or Stable Diffusion, which use a different style of short, comma-separated descriptions. You can describe an image task and get a usable starting point for a chat model that makes images, but a dedicated image prompt tool will usually do better there.
Prompts also do not replace checking the answer. A well-built prompt improves the odds of a good result; it does not make the model's facts correct. Once you have a prompt you like, the AI sentence rewriter can polish the output and the AI email generator handles email drafts directly.
AI prompt generator FAQ
Is this AI prompt generator free?
Yes. It is free with no signup, no account and no daily cap. Generate again as often as you need.
What is the best AI prompt generator?
The best one is the one that teaches you why a prompt works, not only what to paste. This tool shows four techniques side by side and the formula behind them, so you can compare results and write your own next time.
Does it work for ChatGPT and Claude?
Yes. Pick ChatGPT, Claude, Gemini, Grok or Perplexity and the prompts and tip are written for that model. The Any model option produces prompts that work across all of them.
What makes a good AI prompt?
A clear role, the context the model cannot guess, one specific task, and the output format you want. Add constraints such as length, audience and what to avoid. The refined prompt in each set follows exactly that pattern.
Can it generate image prompts for Midjourney?
It is designed for chat models, not image generators. You will get a reasonable text description, but image tools respond better to short, keyword-style prompts written for them.
Do I need to know prompt engineering to use it?
No. Describe the task in plain words. The tool adds the structure, and reading the four versions is a quick way to learn the basics.