Claude Prompt Quality Checklist: Free Prompt Scorer
Before submitting a prompt to Claude, a few structural qualities consistently produce better results. This free, browser-based tool analyzes your prompt against eight quality dimensions — from task clarity to privacy safety — and returns a Weak, Decent, or Strong score with specific suggestions. No data is sent anywhere; analysis runs entirely in your browser.
Free Browser Tool
Paste your Claude prompt and get an instant score across eight quality dimensions: task clarity, context depth, output format, constraints, audience/tone, examples, self-review instruction, and privacy safety. Analysis runs entirely in your browser — no data is sent anywhere.
What Does the Checklist Check?
The checklist evaluates eight structural dimensions of your prompt. Each dimension corresponds to a known factor in how well Claude (or any large language model) interprets and responds to a request.
| Dimension | What it checks | Example fix |
|---|---|---|
| Clear task verb | Does the prompt open with an action word that tells Claude exactly what to do? | Add “Write a…” or “Analyze the…” at the start |
| Sufficient context | Is there enough background for Claude to interpret the task correctly? | Add “for a marketing team” or “based on this article” |
| Desired output format | Does the prompt specify how the response should be structured? | Add “as a bullet list” or “in 3 paragraphs” |
| Constraints or boundaries | Are there limits on scope, length, or content to keep the answer focused? | Add “under 200 words” or “avoid technical jargon” |
| Audience or tone | Does the prompt say who the output is for or what voice to use? | Add “for a non-technical audience” or “professional tone” |
| Example or reference | Is there an example of what good output looks like for this task? | Add “for example:” followed by a short sample |
| Review instruction | Does the prompt ask Claude to check its own answer for errors? | Add “After answering, review your response for errors” |
| No sensitive data | Does the prompt contain patterns that look like emails, phone numbers, or credentials? | Remove or anonymize any personal data before pasting |
How to Use the Checklist
- Write your prompt in your usual editor or text document.
- Paste it into the input field above and click Analyze Prompt.
- Review which dimensions passed and which failed.
- Use the suggestions to revise your prompt.
- Re-analyze the revised version until you reach a Strong score.
- Test the final prompt in Claude and refine based on the actual response.
A high checklist score is a useful starting point, not a guarantee. The quality of Claude’s output also depends on your task complexity, model choice, and whether your prompt logic is internally consistent. For structuring prompts from scratch, try the Claude Prompt Generator.
Quick Prompt Quality Tips
- Start with the verb. Claude responds better to prompts that lead with a direct instruction (Write, Analyze, Compare, Summarize) rather than indirect framing.
- Context reduces guessing. Every assumption Claude has to make about your intent is a potential source of a misaligned response.
- Format instructions save editing time. If you need a table, say so. If you need bullet points, say so. Otherwise Claude picks the format that seems natural, which may not be what you wanted.
- Constraints make output usable. Word limits, exclusion rules, and focus requirements narrow the response to what you actually need.
- Privacy matters. Large language models are not appropriate for real personal data, API keys, passwords, or confidential business information. Use anonymized or synthetic data when testing prompts.
Frequently Asked Questions
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