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Prompt Analyzer

Score a prompt on the parts that change the answer, and see what is missing.

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Nothing is sent anywhere. The score comes from rules you can read below, not from a model, so you can argue with it — which is rather the point.

Quick Tool Overview

The Prompt Analyzer scores a prompt out of 100 on eight visible checks — task, output format, context, role, length, examples, constraints and audience — and lists the vague words worth replacing, so you know exactly what to add before you send it.

What it does
Grades a prompt and explains what is missing
You give it
Any prompt for ChatGPT, Claude, Gemini or an API
You get back
A score, a checklist and a list of vague words
Best for
Improving prompts before they reach production
AI Tools Free, unlimited use No sign-up Runs in your browser

About the Prompt Analyzer

Paste a prompt and get a score out of 100, built from eight checks that each map to something you can see in the text: is there a task with a verb, is the output format named, is there context the model could not infer, a role, a concrete length, an example, constraints and an audience.

The checks are weighted by how much a missing part usually costs. A prompt without a clear task or output format produces a different shape of answer every run, so those two carry the most weight; a missing tone note is a small loss. Every failed check tells you what to add, and the words that promise a quality without defining it — good, engaging, detailed, professional — are listed so you can replace them with a number or an example.

Nothing here calls a model, which is deliberate. The score is reproducible, it is the same every time for the same text, and you can read exactly why it is what it is — which makes it something to argue with and improve against rather than a verdict from a black box.

Key features of the Prompt Analyzer

Reproducible score

Rule-based checks give the same score for the same text every time, so improvements are measurable.

Weighted by impact

A missing task or output format costs far more than a missing tone note, and the score reflects that.

Fix instructions for every gap

Each failed check explains what to add and why it changes the answer.

Vague word finder

Adjectives such as detailed, engaging and professional are listed so you can make them measurable.

Contradiction warnings

Asking for something brief and comprehensive at once is flagged.

How to use the Prompt Analyzer

  1. 1

    Paste your prompt

    Any prompt for ChatGPT, Claude, Gemini or an API call. The score updates as you edit.

  2. 2

    Read the checklist

    Each failed check explains what is missing and why it matters.

  3. 3

    Replace the vague words

    Swap adjectives like "detailed" for something measurable, such as a word count or three named items.

  4. 4

    Fix in order

    Task first, then format, then an example. The score rises fastest that way.

Frequently asked questions

Eight rule-based checks, each with a weight: a clear task (25), a named output format (18), context (15), a role (10), a concrete length (10), an example (8), constraints (8) and an audience or tone (6). The score is the sum of the checks that pass.

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