v0 by Vercel

v0 is a code generation tool created by Vercel that uses AI to generate React and Tailwind CSS codes for user interfaces based on text prompts. It allows users to choose from three generated UI options or refine the output further. The generated code can then be copied and used in other projects. v0 is currently in beta and focuses on frontend code, but the developers plan to expand it to support other libraries and functionality over time.