Get better answers from AI by giving it the details it needs. Fill in what you want, who it’s for and how it should look, and the builder creates a well-structured prompt you can copy.
- Free to use
- No sign-up needed
- Works on phone and desktop
Private by design: everything happens in your browser. Nothing you enter is sent to our server.
Works with ChatGPT, Claude, Gemini, Copilot and other AI assistants. Nothing you type here is sent anywhere – the prompt is built in your browser.
How to build a better prompt
- Describe the task in plain words.
- Choose a role, audience, tone, format and length.
- Add context and any rules or things to avoid. An example of good output helps a lot.
- Copy the prompt and paste it into your AI assistant.
What makes a strong prompt
- Be specific: “a 300-word email to existing customers about our price change” beats “write an email”.
- Give context: who you are, who it’s for and what you’ve tried.
- Show an example of the style or format you want.
- Check the output: AI can make mistakes, so fact-check anything important before you use it.
Frequently asked questions
Does this tool use AI itself?
No. It builds the prompt in your browser using a proven structure. You then paste it into the AI assistant of your choice.
What is the XML tags option?
It wraps each part of the prompt in labelled tags such as <task>. Claude in particular handles prompts laid out this way very well.
What does the prompt strength score mean?
It counts how many of the eight key ingredients you’ve included. More detail usually means better answers.