GPTPromptMaster is a free Chrome extension developed by mcfrank. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This extension allows users to create and use custom Pre and Postprompts in ChatGPT.

With GPTPromptMaster, users can enhance their ChatGPT experience by writing, storing, and utilizing Pre and Post Prompts. Pre Prompts can be used to set the initial context or provide specific instructions to the AI model before generating a response. Post Prompts, on the other hand, can be used to guide the AI model to provide more accurate and desired responses.

The extension provides a seamless integration with ChatGPT, making it easy for users to leverage the power of custom prompts. Whether it's for brainstorming ideas, writing stories, or engaging in natural language conversations, GPTPromptMaster empowers users to have greater control over the AI-generated responses.