PromptOptimizr

PromptOptimizr is a Chrome extension and web-based tool designed to refine and enhance AI prompts for a range of large language models, including ChatGPT, Claude, Gemini, Cursor, and Claude Code. Aimed at developers, content creators, researchers, and AI power users, it addresses the challenge of crafting effective prompts tailored to the unique requirements of different AI model architectures.

The platform allows users to input a rough or initial prompt and receive a version optimized for their chosen AI model. It supports multi-model optimization, ensuring that prompts are adapted to the specific formatting and constraints of each supported model. PromptOptimizr offers three selectable output styles—Concise, Detailed, and Step-by-Step—enabling users to match the tone and structure of the optimized prompt to their specific use case or audience. Users can export the refined prompt with a single click or use the extension to optimize prompts directly within the chat interfaces of ChatGPT, Claude, and Gemini through inline injection.

PromptOptimizr features a workspace editor for pasting and editing raw prompts, a control panel for selecting the target model and output style, and a live preview to see the results in real time. The Chrome extension includes a popup for style selection and tracks usage with a built-in progress bar, displaying the number of prompts optimized in a given month. The tool also provides insight into how different models handle prompts, outlining the unique formatting and key techniques used by each.

A free version of PromptOptimizr is available, as indicated by references to starting for free and usage tracking with monthly limits. The service is positioned as a solution for precise prompt engineering within the modern AI workflow.