Free tool · Runs in your browser

Stella's Prompt Builder

AI only knows what you tell it. Fill in the three things it can't guess, and I'll write the prompt for you. Then copy it into any AI.

Nothing you type leaves this page. No sign-up, nothing saved.

Start from an example:

1 Who should the AI be?

2 The task

What do you want it to do? One or two sentences is plenty.

3 What good looks like

Length

Tone

4 What it can't see

Context, audience, constraints. Who is it for? What do they already know? Anything to avoid? Paste notes here too.

Ask me up to 3 questions if anything important is missing

Your prompt

Your prompt appears here as you fill in the form.

Opens in a new tab. Paste your prompt and hit enter. Never paste passwords, ID numbers or bank details into any AI.

Why it works

Who it is, what good looks like, and what it can't see. Those three lines fix most "AI is useless" moments.