Vite is a modern JavaScript build tool that offers lightning-fast performance and out-of-the-box support for modern JavaScript features. It uses native ES modules and provides instant server-side rendering, zero configuration, and automatic static optimization. Vite is built on top of the popular Rollup bundler but is much faster due to its use of native ES modules and its ability to skip unnecessary builds. It also provides hot module replacement (HMR) and supports modern JavaScript features such as TypeScript, JSX, and CSS pre-processors.