Nine fields — goal, role, context, audience, format, length, tone, guardrails, example — and it assembles a well-formed prompt as you type. It is the Prompt Improver run forwards: instead of diagnosing a prompt you wrote, it stops you writing a bad one.
One sentence, as concrete as you can make it.
Your prompt
Nothing leaves your browser. Your context and examples stay on this device.
How it works
- Fill what you know and skip what you do not. Empty fields are left out rather than filled with filler.
- Guardrails are one-click: no preamble, no restating, no AI clichés, no em-dashes, think first, ask first.
- Switch between headed sections, XML tags for Claude, or a single compact paragraph.
- The example field is optional and does more than all the others combined.
What it does not do
Every tool on this site says this plainly, because a tool that pretends to do more than it does costs you more than it saves.
- It arranges what you give it. It cannot supply the context, the audience or the example — those are the parts only you have.
- A prompt built here is a starting point. Run it, see what comes back, then adjust.
Nothing you type here leaves your browser
There is no account, no server and no logging. The whole tool is JavaScript running on your own machine — close the tab and it is gone. You can check: open your browser’s network tab and use it.
Questions people ask
The example. One short worked example of the output you want beats three paragraphs describing it, on every model we have tested.What is the most important field?
XML tags if you are using Claude and the prompt is long. Headed sections for everything else. Compact only when you are pasting into something with a tight input box.Which format should I pick?
Prompts that go with this
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Fundamentals
The handful of things that account for most of the difference.
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Blog & Articles
Articles that say something, in a structure that earns the reader’s next paragraph.
7 prompts