Free AI Prompt Builder for ChatGPT, Claude and Gemini

Build a clear, structured prompt in a minute. Fill in what you know, leave the rest empty, then copy the result into ChatGPT, Claude, Gemini or Copilot. Everything runs in your browser; nothing is sent or saved.

1. Who should the AI act as? Example: an experienced Etsy seller, a patient math tutor, a UK accountant. 2. What exactly do you want? Start with a verb: write, summarize, compare, plan, fix, explain. 3. Background it needs to know Facts, your situation, what you've tried, text to work from.

4. Audience

5. Tone

6. Output format

7. Length

8. Rules and limits What to avoid or always include. One per line. Ask me questions first if anything important is missing Show your reasoning as short steps, then the final answer

Your prompt will appear here as you type.

Why this structure works

AI assistants answer the question you actually typed, not the one in your head. Most weak answers come from missing context: the model doesn't know who the result is for, what format you need or what to avoid, so it guesses. Giving it a role, a specific task, the background facts, the audience and the output format removes most of that guessing. The help pages from OpenAI and Anthropic give the same advice: be specific, give context, and say what the output should look like.

Tips

Paste real material. Your notes, a draft or a product spec in the "Background" box beat any clever wording.
Iterate. Treat the first answer as a draft. Reply with what to change ("shorter", "more specific to my audience", "drop the second idea").
Check facts. AI can state wrong prices, dates and rules confidently. Verify anything important on the official source.
Keep private data out. Don't paste passwords, card numbers or other people's personal details.

Want the full method with examples? Read How to Write ChatGPT Prompts That Get the Best Results.