# plenz

> Open-source browser extension that refines AI prompts in real time. Keep prompt text local and improve every instruction before you send.

## Docs

- [plenz | Rewrite AI Prompts Before You Send Them](https://plenz.siddsingh.dev/): Overview of plenz, an open-source browser extension that acts like Grammarly for AI prompts, offering real-time refinement across major AI chat platforms.
- [Getting Started | plenz](https://plenz.siddsingh.dev/getting-started): Step-by-step guide to installing plenz, configuring your AI provider (OpenAI, Anthropic, Gemini, etc.), and adding an API key.

## Key Facts

- Core feature: Inline prompt rewrite suggestions before sending a message
- Privacy: Local-first architecture (API keys and prompt text stay in browser storage)
- Supported platforms: ChatGPT, Claude, Gemini, Mistral, OpenRouter, Custom AI surfaces
- Supported providers: OpenAI, Anthropic, Google Gemini, Mistral, Groq, OpenRouter, Custom local and self-hosted models
- Pricing: Bring Your Own Key (usage billed directly by your chosen model vendor)

## Contact

- Website: https://plenz.siddsingh.dev
- GitHub: https://github.com/i-see-pixels/plenz
- Chrome Web Store: https://chromewebstore.google.com/detail/plenz/fdbjbkomedpokmfkmacjnbdnghkejihl