Prompt Natus - Free Prompt Optimizer

One-click prompt optimization for ChatGPT, Claude, Gemini & more. Use your own API key. Always free and simple to use.

Prompt Natus turns your simple messages into clear, well-structured prompts that help AI chatbots give you better, more accurate answers. It works beside your chat window and improves your prompts with one click. 👇Why choose Prompt Natus? 1️⃣ 100% free and unlimited Use your own Google API key instead of subscriptions or limited free plans. This keeps it free and nearly unlimited (up to 1000 requests per day), with no accounts, data collection, or costs. Everything runs in your browser, keeping your key private and your data local. 2️⃣ Better prompts, better results Automatically improves your prompt structure using prompt engineering best practices. You get more relevant outputs with fewer retries. 3️⃣ Simple and private After setup, a small blue button appears next to the chatbot's text box. Click to optimize, edit if needed, and send. Your prompts and history stay on your device (up to 500 entries stored locally). No tracking, no external storage, and the code is open-source. 🔑How to get my Google API Key? Getting your Google API key is simple, fast, and completely free. There are no hidden fees or automatic payments, and you can remove or replace your key anytime in the extension settings. • Go to https://aistudio.google.com • Click "Get started" at the top right and sign in with your Google account. • In the left sidebar, click "Get API key." • Click "Create an API key." • Copy the key that appears. • Then, open the Prompt Natus extension settings by clicking its icon in your browser toolbar, and paste your key into the settings panel. That's it—your setup is complete. Your key stays fully private and is stored only on your device.