Bolt.new is an AI-powered full-stack web application builder developed by StackBlitz. It runs an entire development environment directly in the browser using WebContainer technology, requiring no local setup. Users describe their application idea in natural language, and Bolt generates a complete working application with frontend, backend, and database integration. The platform supports Claude Agent mode powered by Claude 4.5 for production-quality code generation with fewer errors. Bolt automatically provisions a database for every new project and supports Supabase integration for advanced configurations. The Design Feedback Mode allows users to brainstorm with the AI before making changes, refining layouts and user experience collaboratively. Bolt supports one-click deployment to production and integrates with GitHub for version control. It is designed for both non-technical users building their first app and experienced developers looking to accelerate prototyping and full-stack development workflows.