Markprompt is a tool designed for swiftly creating GPT-4 prompts tailored for Markdown documents. It simplifies the process by eliminating the requirement for configuration, hosting, or metrics collection. Compatible with Markdown, Markdoc, and MDX file formats, Markprompt supports all OpenAI completion models, including GPT-4. It provides a generous free-tier plan and offers scalability based on usage. Additionally, Markprompt includes features like feedback and analytics to identify areas for content improvement. The tool's source code is accessible on GitHub, fostering transparency and community collaboration.