# Prompt Optimizer (open source)

> Popular open-source prompt optimizer you can use online or self-host.

- Official site: https://github.com/linshenkx/prompt-optimizer
- Category: Prompt Optimizers
- Pricing: Open Source
- Works with: OpenAI, Claude, Gemini, DeepSeek
- Tags: open source, self-host, compare
- Listed on TellPrompt: https://tellprompt.com/tool/prompt-optimizer-open-source

## About

Prompt Optimizer is an open-source project with tens of thousands of GitHub stars. It rewrites your prompt for clarity and structure and lets you compare the original and optimized versions side by side.

It runs in the browser, as a desktop app or self-hosted, and works with many model providers through your own API key.