Bolt.new is an AI-powered development tool created by StackBlitz that allows users to build, run, and deploy full-stack web applications directly in their browser. By using natural language prompts, developers can generate UI components and application logic without needing extensive coding knowledge. Bolt.new supports popular frameworks like React, Vue, and Astro, providing a seamless experience for creating modern web applications. Its unique features include real-time code execution, debugging capabilities, and integration with various APIs, making it an efficient tool for rapid prototyping and development. Users can start for free with limited credits and choose from various subscription plans for more extensive usage.