AI prompt builder

Describe what you want in plain words. Get a complete, well-structured prompt for the AI model of your choice: clear, concise, and never padded with things you didn’t ask for.

Already have a prompt, just messy or rough? Use Prompt Optimizer to restructure it. Prompt Builder is for writing a prompt from scratch, starting from just an idea.
Build Settings
0 / 4,000 characters
IdeaYour IdeaJust an Idea
“Review my pull request for bugs and unclear naming”
BuiltGenerated Prompt+ Ready to Use
Role: Senior code reviewer.

Task: Review the attached PR diff for bugs, unclear variable/function names, and style issues.

Output format: Inline comments grouped by file, each tagged [Critical] or [Minor].

Constraints: Do not suggest unrelated refactors outside the diff.
Use this outside the website

Call it as an MCP tool from Claude Desktop, Claude Code, Cursor, Copilot, Gemini CLI, Antigravity, and more — POST /api/mcp

Setup guide

Prompt builder by AI model

Pick the AI you are writing for and open the builder tuned for it.

From Idea to Prompt

Stop Staring at a Blank Prompt Box

Most people know what they want from ChatGPT, Claude or Gemini but not how to phrase it. Vague requests get vague answers. Prompt Builder takes your rough idea and writes the prompt for you: the task, the context that matters, sensible constraints and the output format.

It follows one rule: better, not longer. Your intent stays exactly as you stated it, nothing is invented, and details only you know are left as clear placeholders.

How It Works

1. Describe your idea

A sentence or a few lines is enough. Say what you want the AI to do, not how to prompt it.

2. Pick the model

Choose the AI you'll use, a use case and how detailed the prompt should be. The structure adapts to how that model reads best.

3. Copy a lean prompt

Get a ready-to-paste prompt with no filler. Fill in any [placeholders], then run it — or refine it with the other tools.

What the Prompt Builder does

The AI prompt builder turns a plain-language idea into a complete, ready-to-paste prompt. You describe what you want, choose which AI you are writing for and what kind of task it is, and the builder produces a finished prompt with the context, instructions and output format already filled in.

It is for the moment before you have a prompt at all. If you already have a draft that is not working, the prompt optimizer or prompt debugger is the better start. Writing for one assistant in particular? Open the Claude prompt generator, the Gemini prompt generator or the Grok prompt generator, which are this builder with that model already selected.

How to use the Prompt Builder

  1. 1

    Describe your idea

    Say what you want in everyday words: the task, who it is for and anything you care about.

  2. 2

    Pick a target model

    Choose Any AI model, ChatGPT, Claude, Gemini, Grok, DeepSeek, Cursor or Windsurf, or GitHub Copilot so the wording suits that tool.

  3. 3

    Choose the use case and detail level

    A use case focuses the prompt on writing, coding, analysis and so on. A detail level controls how thorough it is.

  4. 4

    Build, edit and copy

    Review the result, edit anything that is not quite right, then copy it or take it further with another tool.

Example: before and after

Before

I need a weekly update email to my team about the project

After

You are a project lead writing a weekly status email to a cross-functional team.

Write an email under 200 words with these sections: Progress this week, Blockers, Next week's priorities, Help needed.

Tone: clear, upbeat, no jargon. Use short bullet points. If I have not given a detail, ask me for it instead of inventing it.

Project details: [paste your notes here]

The idea had no format, tone or length. The built prompt supplies them and leaves one clear place to paste your own notes.

Who the Prompt Builder is for

  • Beginners

    Skip the blank page and start from a prompt that already has the right parts.

  • Busy professionals

    Go from an idea to something you can paste into the AI in under a minute.

  • Developers using AI editors

    Build prompts tuned for Cursor, Windsurf or GitHub Copilot.

  • Teams

    Produce consistent prompts instead of everyone writing their own from scratch.

Prompt Builder FAQ

What is an AI prompt builder?

An AI prompt builder turns a rough idea ("help me write a launch email") into a complete prompt an AI model can act on well: a clear task, the context that matters, sensible constraints and an output format. You describe the goal; it does the prompt engineering.

What is a metaprompt?

A metaprompt is a prompt that writes another prompt. The Prompt Builder works this way: it gives an AI model your idea together with instructions for turning it into a finished prompt for the model, use case and detail level you chose, then returns the result for you to copy. It does not run the finished prompt for you.

Will it add details I didn't ask for?

No. The builder keeps your intent and never invents requirements, audiences or technologies. When a detail is missing but would change the result, it leaves a short [PLACEHOLDER] for you to fill in instead of guessing.

Why choose a target model?

The builder changes how it structures the prompt. For Claude it wraps sections in XML tags. For ChatGPT, Gemini and Grok it uses Markdown sections with an explicit output format. For Cursor, Windsurf and GitHub Copilot it states the goal, scope and acceptance criteria. Pick Any AI model for a prompt that reads well anywhere. There are pages for the Claude prompt generator, the Gemini prompt generator and the Grok prompt generator.

What is the difference between the Prompt Builder and the Prompt Optimizer?

The Builder starts from an idea and writes a prompt. The prompt optimizer starts from a prompt you already wrote and improves it. Build first, then refine or check the result with the optimizer, the debugger or the Intelligence Score.

Is the AI prompt builder free?

Yes. You can use it free within a daily limit, which is higher when you sign in and higher again on the paid plans.

Can I use the Prompt Builder inside my AI chat?

Yes. The Cuelara browser extension adds a Build option to the chat box on ChatGPT, Claude, Gemini and other AI sites.

Prompts to try it on

Browse the Prompt Cookbook
React Prompt Recipes

AI Prompt to Build an Accessible React Modal Component

This prompt generates an accessible React modal component , built for frontend developers who need a dialog that actually works with keyboar…

ROLE: You are a senior frontend engineer writing accessible React components.

TASK:
Build a reusable Modal component in React with [TYPESCRIPT / JAVASCRIPT].

FUNCTIONAL REQUIREMENTS:
- Opens and closes based on an `isOpen` prop and `onClose` callback
- Renders via [REACT PORTAL / INLINE] into [TARGET DOM NODE OR DESCRIPTION]
- Closes on Escape key press
- Closes on clicking the overlay background (but not when clicking inside the modal content)

ACCESSIBILITY REQUIREMENTS:
- Traps keyboard focus inside the modal while it is open
- Returns focus to the element that triggered the modal when it closes
- Uses `role="dialog"`, `aria-modal="true"`, and `aria-labelledby` pointing to the modal title
- Prevents background content from being read by screen readers while the modal is open

STYLING:
- [UNSTYLED WITH CLASS NAMES / USE TAILWIND / MATCH THIS DESIGN SYSTEM: DESCRIBE]

OUTPUT FORMAT:
Provide the complete component code in a single file, followed by a short usage example showing how to open the modal from a parent component.

Make this prompt yours

Code Generation & Software Engineering

Prompt to Generate Unit Tests From a Function

This prompt turns an existing function into a set of unit tests covering its normal behavior, edge cases, and error handling, built for deve…

You are a senior software engineer writing unit tests.

Function to test:
[PASTE THE FUNCTION CODE]

Language and test framework: [E.G. TYPESCRIPT WITH VITEST, PYTHON WITH PYTEST]

Instructions:
1. Write tests covering normal, expected inputs.
2. Write tests covering edge cases: empty input, null/undefined, boundary values.
3. Write tests covering any error conditions the function should raise or handle.
4. Use clear, descriptive test names that state what is being verified.
5. Return only the test code, in a single code block, ready to run.

Output format: one fenced code block containing the complete test file.

Make this prompt yours

React Prompt Recipes

ChatGPT Prompt to Build a Reusable React Form Component with Validation

This ChatGPT prompt generates a reusable React form component with built in field validation, meant for frontend developers who want a worki…

Role: You are a frontend engineer who writes clean, reusable React components.

Context:
- Component purpose: [E.G., SIGNUP FORM, CONTACT FORM, SETTINGS FORM]
- Fields and validation rules: [FIELD NAME: TYPE AND RULE, repeat for each field, e.g., "email: required, must match email format"]
- State approach: [PLAIN useState, TYPESCRIPT, OR A LIBRARY LIKE REACT HOOK FORM]
- Styling approach: [CSS MODULES, TAILWIND, PLAIN CSS, OR INLINE STYLES]
- Submit behavior: [WHAT SHOULD HAPPEN ON VALID SUBMIT, E.G., "CALL AN onSubmit PROP WITH FORM VALUES"]

Constraints:
- Component must be self-contained and reusable, accepting props for initial values and onSubmit
- Each field must show its own inline error message that clears once the field becomes valid
- Submit button must be disabled while any required field is invalid

Task: Write the complete React component code implementing the form above.

Output format:
1. The full component code in a single fenced code block
2. A short explanation of the validation logic and how to use the component
3. Any assumptions made about props or styling

Make this prompt yours

Further reading: Docker Multi-Stage Builds for Node.js Apps