What it does
A prompt is the instruction you type into an AI tool. Prompt Optimizer helps you improve those instructions with one click, over several rounds, so the AI gives more accurate and useful answers.
You can compare and score results to see whether a new prompt really is better, save good prompts with their history, and use it for image-generation prompts too. It connects to many AI services, including OpenAI, Gemini, DeepSeek and Grok.
It comes as a website, a desktop app, a Chrome extension or a self-hosted version. Its makers say your data goes straight to the AI provider rather than through their servers.
Who it's for
Anyone who uses AI chatbots or image generators and wants better results from their prompts.
Can I use it without coding?
Yes. Use the website, desktop app or Chrome extension; you'll need your own key for an AI service. New to this? Start here.
Can I run it?
- Cost
- Free, but needs an AI accountThe software is free, but it uses an online AI service (like OpenAI or Anthropic), which usually charges for use.
- Runs on
- Web browser, Windows, Mac, Linux, Server
- Computer
- An ordinary computer is fine
- Privacy
- Your choice: run it on your device or use an online service
- API key
- Not needed
Try it
- Open the online version in your browser, or download the desktop app from the releases page.
- Connect one working text model from an AI provider in the Model Manager.
- Paste your prompt, optimise it, and compare the results side by side.
Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?
Before you install
- Only download from the official GitHub page or the official download page above. Copies with similar names exist for many popular projects.
- No standard license listed. Check the GitHub page before using it for business.
- More on staying safe