v0 is an AI-powered development platform by Vercel that transforms natural language prompts into production-ready React components and full-stack Next.js applications. Originally launched as a UI generation tool, v0 has evolved into a comprehensive agentic development assistant capable of planning, coding, and deploying entire web applications. Users describe what they want to build through a chat interface, and v0 generates high-fidelity code using React, Next.js, Tailwind CSS, and shadcn/ui components. In 2025-2026, v0 expanded significantly with full-stack capabilities including API route generation, database setup, server-side logic, and autonomous terminal access for running scripts and installing dependencies within a secure sandbox. Key features include Figma-to-code conversion for transforming designs into functional components, intelligent autofixers that detect and repair JSX and TypeScript errors in real-time, Design Mode for visual editing, and one-click deployment to Vercel's infrastructure. The platform uses a credit-based pricing model tied to token usage, with credits consumed based on prompt length, image uploads, and code generation complexity. v0 has become a leading tool in the 'vibe coding' movement, enabling both developers and non-developers to build professional web applications through conversational AI.