Prompy
Draft. Sharpen. Send.
Free - Free to use in-browser; no account, no API key, no credit card. Option to bring your own API key or run locally.
About Prompy
Prompy is an AI prompt optimizer that rewrites your rough drafts into clear, well-structured prompts directly as you type in web LLMs (ChatGPT, Claude, Gemini and more). It runs on-device via Chrome's built-in AI (no account or API key required), with options to bring your own API key or run fully local. Prompy streams suggestions into a card beside your cursor, offers multiple improvement styles (Detailed, Concise, Professional, Coding), and lets you replace text with one click. Keys stay on your device, encrypted at rest.
Key Features
- On-device prompt rewriting using Chrome's built-in AI (no API key required)
- Supports ChatGPT, Claude, Gemini and other web LLMs; streams suggestions beside the cursor
- Optional bring-your-own-key or fully local operation; keys encrypted at rest
- Multiple improvement styles: Detailed, Concise, Professional, Coding
- One-click replace, copy variations, and quick three-keystroke workflow
Who is this for?
Users of web-based AI chat tools (ChatGPT/Claude/Gemini) — writers, developers, prompt engineers and creators who want clearer, more effective prompts.
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FreeFree to use in-browser; no account, no API key, no credit card. Option to bring your own API key or run locally.
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