AI Explained · Tool

Prompt Optimizer

Paste a prompt. Prompt Doc scores it, finds what's missing, and hands back a stronger, structured version, instantly, in your browser. No account, no key required.

Meet Prompt Doc, the Prompt Optimizer. Paste a prompt and get an instant checkup: a health score, the missing pieces, and a restructured version you can copy. All client-side, nothing leaves your browser.
Your prompt
Advanced: let AI rewrite it for youbring your own key

Optional and off by default. The free tool above already optimizes your prompt with no key. This step calls a real model to rewrite it, using your API key, kept in your browser and sent straight to your provider, never to KB Cafe.

What Prompt Doc checks

A strong prompt isn’t about magic words, it’s about giving the model the pieces it needs to stop guessing. Prompt Doc looks for eight of them, scores what’s there, and flags what’s missing:

  • Goal and output format, what you want and how it should look.
  • Audience, role, and tone, who it’s for and who the model should be.
  • Context, constraints, and examples, the background and the guardrails.

The score is a transparent rubric, every point is shown and tied to a piece that’s present or missing. No black box. Then it restructures your prompt into a template you can copy and fill.

One tool, built from many

Prompt Doc is the all-in-one. If you’d rather learn each piece on its own, the focused tools it’s built from are still here: the Prompt Builder, Linter, X-Ray, Diff, and good vs bad examples. New to prompting? Start with the Learn Prompting course.

FAQ

Does it send my prompt anywhere?

No. The scoring and restructuring run entirely in your browser. Nothing is uploaded. The only exception is the optional “Rewrite with AI” step, which goes straight from your browser to your provider with your own key, never through KB Cafe.

Do I need an API key?

No. The score, the missing-elements checklist, and the structured rewrite all work with no key and no account. The key only unlocks the optional AI rewrite if you want it.

How is the score calculated?

It’s a fixed rubric: each of the eight prompt elements is worth a set number of points, shown next to it. Detected elements earn their points; the total is the sum. Deterministic and fully visible, not an opaque “AI rating.”

Related

Estimate what a prompt costs with the Token Counter, or browse AI Explained.