Free Gemini prompt generator

Describe what you want in plain words and get a complete prompt written for Gemini. It is the Cuelara Prompt Builder with Gemini already selected.

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

Setup guide

Other models

The same builder, tuned for a different assistant.

A Gemini prompt generator that writes the structure for you

This Gemini prompt generator turns a rough idea into a finished prompt written for Gemini. Describe what you want in everyday words, and the builder returns a prompt you can paste into Gemini, with the task, constraints and output format spelled out.

It is the Prompt Builder with Gemini preselected as the target. You can change the target on the main prompt builder page, and the Claude and Grok prompt generators have their own pages below.

For Gemini the builder asks for clear Markdown sections, concrete constraints and an explicit output format, and puts the most important instruction first. It keeps your intent as you stated it and never invents requirements, audiences or numbers. Anything it cannot know becomes a short placeholder for you to fill in.

What the builder does for Gemini

  • Most important instruction first

    The prompt opens with the instruction that matters most, so it is not buried under background.

  • Clear Markdown sections

    Headings and bullet lists separate the task, context and requirements, which keeps long prompts easy to scan and to edit.

  • Concrete constraints

    The builder turns vague wishes into specific, checkable limits, such as length, format and what to leave out, but only when your idea states or clearly implies them.

  • An explicit output format

    The prompt says what the answer should look like: a table, a list, a short email. This is the part people most often leave out.

Example: an idea built into a Gemini prompt

Your idea

Plan a three-day trip to Lisbon for two people who like food and walking

Built for Gemini

## Task
Plan a three-day trip to Lisbon for two people who enjoy food and walking.

## Requirements
- Group each day into morning, afternoon and evening.
- Keep walking between stops under [MAX WALKING TIME PER LEG].

## Constraints
- Do not include anything that needs advance booking unless you flag it.

## Output format
A table per day: Time | Place | What to do.

Illustrative output. The idea did not say how far you like to walk, so the prompt leaves a placeholder instead of choosing a number for you.

Who this Gemini prompt generator is for

  • Gemini chat users

    Skip the trial and error on the first prompt.

  • People using Gemini for planning and research

    Get the output format spelled out so the answer comes back usable.

  • Students and writers

    Turn a loose request into a prompt with clear constraints.

Gemini prompt generator FAQ

What is a Gemini prompt generator?

A Gemini prompt generator writes a ready-to-use prompt for Gemini from a rough idea. Cuelara's version asks for clear Markdown sections, concrete constraints and an explicit output format, with the most important instruction first.

How is a Gemini prompt different from a Claude prompt here?

When you pick Gemini the builder uses Markdown sections and puts the most important instruction first. When you pick Claude it wraps sections in XML tags instead. The idea and your intent stay the same.

Will the builder add details I did not ask for?

No. It keeps your intent and does not invent requirements, audiences or numbers. When a missing detail would change the result, it leaves a [PLACEHOLDER] for you to fill in.

Can I use the prompt in the Gemini app or the API?

Yes. The output is plain text, so you can paste it into the Gemini app or send it through the API after filling in any placeholders.

Is the Gemini prompt generator 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.

Already have a prompt? Rewrite it with the prompt optimizer, find what is wrong with it using the prompt debugger, or grade it with the AI prompt checker.