Parcel

Parcel is a zero-configuration build tool for web applications that handles development and production workflows without requiring setup files. It starts with an HTML file and works out of the box with languages and file types including HTML, CSS, JavaScript, TypeScript, SASS, images, fonts, and videos, automatically installing plugins for file types not included by default.

Parcel includes a development server with hot reloading, HTTPS support, an API proxy, and lazy dev builds that defer building files until requested. It features diagnostics with syntax-highlighted code frames, parallel builds using worker threads, and caching that tracks files, configuration, and dependencies for granular invalidation. Production builds include tree-shaking for ES modules and CommonJS, minification for JavaScript, CSS, HTML, and SVG, image resizing and optimization, Gzip and Brotli compression, code splitting, and content hashing. Transpilation targets browsers via browserslist, with differential bundling for module and nomodule scripts. The JavaScript, CSS, HTML, and SVG compilers are written in Rust, with the JavaScript compiler built on SWC.

Parcel is intended for developers building web applications who want a build tool without configuration overhead. It is open source and available as a command-line tool; no pricing, editions, or usage-based plans are indicated.