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Analyze LLM prompts for efficiency, cost, and energy impact. Zero AI tokens used — all analysis is rule-based. Analyze your AI prompts for efficiency, cost, energy use, and CO2 impact. Works on ChatGPT, Claude, Gemini, Perplexity & more. **What it does:** Promptlee analyzes the text in your AI chat input box and gives you an instant efficiency score (0-100) with a letter grade. It estimates token count, cost, energy consumption (Wh), CO2 emissions (g), and water usage (mL) for every prompt. **Key features:** - Instant prompt scoring with detailed issue breakdown - Token count estimation with cost, energy, CO2, and water metrics - Auto-analyze on send — get feedback without extra clicks - Cumulative session stats with score trends over time - Cross-site comparison — see which AI tool gets your best prompts - Prompt templates library for common tasks - Score threshold alerts — get warned when prompt quality drops - CSV export of your full analysis history - Light and dark theme support - Works on ChatGPT, Claude, Gemini, Perplexity, Poe, and any custom site you add