Promptlee — Prompt Efficiency Analyzer

by Ishdeep · Education

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Analyze LLM prompts for efficiency, cost, and energy impact. Zero AI tokens used — all analysis is rule-based.

Users

−2 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#94K

#79K among extensions

Version

1.0.0

updated 16 Mar 2026

Users

monthly, 7 months

Latest, 15 Oct 2026: 72 usersMove the mouse over the chart for any month

Ratings count

monthly, 7 months

Latest, 15 Oct 2026: 2 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Promptlee — Prompt Efficiency Analyzer

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