AI Prompt Optimizer - Rewrite weak AI prompts into structured ones - free, no API

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Most bad AI outputs are a prompt problem, not a model problem. This tool scores your prompt across 7 dimensions, flags what's missing, and rewrites it into a clear Role/Task/Context/Constraints/Format structure — instantly. Fully rule-based, zero API calls, so nothing you paste ever gets sent to a third-party model. Free, no signup.

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Built this after noticing I rewrote the same kind of vague prompt into the same better structure, over and over, every day. Made it rule-based on purpose — most "prompt improvers" just pipe your text through another AI, which means paying to have a black box guess what you meant. This one shows you exactly why it changed what it changed. Would love feedback, especially on prompts it doesn't handle well yet.