Prompt Mirror: Learn AI While You Use It

See your prompt score live as you type in ChatGPT, Claude or Gemini and learn to write better ones. Free, 100% local.

Get better answers from AI by writing better prompts. Prompt Mirror shows a live score from 0 to 100 while you type in the prompt box of ChatGPT, Claude and Gemini, and tells you what is missing: a clear task, context, format, limits, a role, an example, the audience. Watch the checklist light up as you improve your prompt. WHAT YOU GET • Live prompt score right where you write • A checklist of the 7 ingredients of a good prompt • 3 interactive lessons of about 60 seconds: vague vs precise, which prompt wins, fix this prompt • A daily streak to build the habit • A shareable score card: "I scored 34/100, can you beat me?" • Works in English, Italian and Spanish PRIVATE BY DESIGN • 100% local: your prompts never leave your browser • No account, no tracking, no network requests • Only works on the four AI chat sites it lists; the only permission is local storage Works with ChatGPT, Claude and Gemini. Not affiliated with or endorsed by OpenAI, Anthropic or Google.