PromptScore — Free AI prompt quality scorer

Paste any prompt into PromptScore and get an instant 0–100 NovaScore across five dimensions of prompt quality — plus a senior-level rewrite you can copy and use immediately in ChatGPT, Claude, Gemini, or any other AI assistant. Free, no signup.

What PromptScore checks

• Clarity: is your instruction unambiguous?
• Specificity: are constraints and success criteria concrete?
• Context: does the prompt give the model what it needs to answer well?
• Output format: is the shape of the response defined?
• Role & audience: is the model's role and reader clear?

Frequently asked questions

Is PromptScore free?

Yes. No signup, no email required.

How long does it take?

Roughly 15 seconds. It runs in your browser.

Which AI models does it work for?

The upgraded prompt works across ChatGPT, Claude, Gemini, and every mainstream LLM.

Do you store my prompts?

Prompts are processed for scoring and rewriting. We do not sell data.