Prompt Natus

Prompt Natus is a browser extension that rewrites AI prompts into a more structured form for use with chat tools such as ChatGPT, Gemini, Claude, Perplexity, Mistral, DeepSeek, and Copilot. It is described as a free AI prompt optimizer and says it transforms prompts in one click.

The extension adds an Optimize button in the browser and uses AI to refine a prompt after the user writes it in a supported tool. Example prompts on the page include writing a marketing email, debugging code, and summarizing Hamlet themes. The result is presented as an optimized prompt intended to produce better responses from AI platforms. The page also describes the process as three steps: write a prompt, click Optimize, and receive the optimized version.

Prompt Natus says it stores the user's API key and prompts locally in the browser's storage. It states that the data never touches its servers and that the optimization happens directly between the browser and Google servers using the user's own API key obtained through Google AI Studio. The page also says the extension is free forever, with no ads or premium tiers, and calls it 100% free and private.

It is presented as a Chrome extension, and the page describes it as an independent project that is not affiliated with the AI platforms it mentions.