AI Business Idea Prompt Builder

A free, browser-based tool. Runs entirely in your browser — no sign up, nothing stored.

100% FreeRuns in your browserbeginner

Idea details

The ideaTarget customerStageFocus on

Your prompt

Copy-ready prompt

You are a pragmatic startup advisor. Pressure-test this idea honestly — point out problems, don't just cheerlead.

Idea: [describe the idea]
Target customer: [who is it for]
Stage: Idea. Focus on: All.

Deliver: target market & main competitors, the key risks and assumptions to test first, a lean MVP scope, and pricing options. Call out the single riskiest assumption.

~86 tokens59 words370 chars

A template built from your inputs — paste it into your AI tool. Runs in your browser; nothing is uploaded.

How to use this calculator

Describe the idea and target customer, and pick the stage and focus.
Copy the prompt into your AI tool.
Use the critique to decide what to test first.

How it works

The prompt frames the AI as a pragmatic advisor told to point out problems, not cheerlead — covering market, competitors, risks, MVP scope and pricing.

It builds the prompt; the analysis is produced by your AI tool and should be sanity-checked.

Frequently asked questions

Does this use AI or send my prompt anywhere?

No. It runs entirely in your browser using rule-based checks — your prompt is never uploaded or sent to any AI model. Still, avoid pasting passwords, API keys or private data into any tool.

Related tools

Tip: Enter any known values to calculate the remaining results.

All calculations run in your browser. Your inputs are never saved or transmitted.